ChatGPT answers, unedited

For a small indie studio, I’d separate this into “turnkey storefront” vs. “build-your-own delivery.” There isn’t one universally best choice.

My practical picks

• itch.io — best if you want minimal infrastructure.

It handles checkout, customer ownership, download pages, downloadable builds, and game keys. Purchasers get a unique download page, and you can update the files there later. itch.io itch.io
For large builds, its butler tool supports uploads up to 30 GB, incremental updates, retries, and platform-specific builds. itch.io
Choose this if: you want to sell games without maintaining a delivery backend.

• Cloudflare R2 + your own storefront — best if you already have a website/backend.

R2 is S3-compatible object storage designed for serving large files, with no egress bandwidth fees. Cloudflare Docs Cloudflare Docs You can keep the bucket private and have your server issue short-lived presigned download URLs after verifying the customer's purchase. Cloudflare Docs Cloudflare Docs
R2 encrypts stored objects and uses TLS for transfers. Cloudflare Docs
Choose this if: you want your own branded store, customer accounts, licensing system, and maximum control over delivery.

The architecture I'd use

For a custom store, I'd avoid emailing permanent download URLs. Instead:

Customer → Store/checkout → Purchase record → authenticated download request → short-lived signed URL → R2 → game build

For example:

1. Store the game archives privately in R2.
2. Customer purchases the game.
3. Your database records ownership and the exact build(s) they're entitled to.
4. Customer clicks Download.
5. Your backend authenticates the request and generates a presigned URL valid for, say, 10–30 minutes.
6. The browser downloads directly from R2 rather than going through your application server.
7. Keep checksums for every release so customers can verify downloads.

That gives you a much better security model than putting a permanent game-v1.2.zip URL on your website. R2's presigned URLs can be restricted to a particular object and expiration time. Cloudflare Docs

What about Steam keys?

If you're selling Steam keys alongside standalone downloadable builds, itch.io is particularly convenient: its purchase/download pages can expose external keys such as Steam keys in addition to the downloadable files. itch.io itch.io

If you're selling directly from your own site, I'd treat the key inventory separately from file delivery: encrypt/protect the unused key inventory, assign a key transactionally after payment, and never expose the entire key pool to the client.

Bottom line: if you're a tiny team and don't specifically need your own commerce infrastructure, itch.io is probably the simplest solution. If you already have a store and want full control, R2 + private objects + short-lived signed URLs is the architecture I'd choose.

If you tell me roughly how large your builds are (e.g. 5 GB vs. 100 GB), expected monthly downloads, and whether you already have a website/backend, I can narrow this down to a specific stack and estimate the costs. Cloudflare Docs Cloudflare Docs

For a small indie studio selling downloadable game builds + license/download keys, I’d shortlist SendOwl and Lemon Squeezy, with the choice depending on whether delivery security or all-in-one commerce matters more.

My shortlist

SendOwl is probably the closest match to your requirements. It supports software/ZIP files, automatically delivers purchases, lets you limit downloads and expiration, and supports license-key management. Its current business plans advertise a 50 GB maximum file size. SendOwl Help Center SendOwl

It also supports self-hosting the actual builds on Amazon S3 while letting SendOwl handle the purchase/access layer, which is attractive if your games are tens of GB and you want more control over storage/CDN costs. SendOwl Help Center

Lemon Squeezy is particularly interesting if you want the commerce side bundled together. It can issue license keys automatically, and its download URLs are signed, expire after one hour, and are rate-limited. The current product limit is 5 GB total files per product, however, so that can become restrictive for modern AAA-sized indie builds. Lemon Squeezy Docs Lemon Squeezy Docs

itch.io is worth considering if you don't need your own checkout. Its download keys are unique URLs granting access to a game's files, and its API lets you verify whether a particular key is valid, revoked, or associated with a purchase. itch.io itch.io

What I'd build for your studio

For builds larger than a few GB, I'd use:

Your store/checkout → SendOwl → private object storage/CDN → expiring download URL

And keep the license key separate from the download URL. That way, leaking a download URL doesn't automatically constitute leaking a reusable game key.

For particularly large games, I'd also consider S3-compatible object storage + a CDN underneath the delivery service rather than treating Google Drive/Dropbox as your file host. SendOwl explicitly supports private S3 hosting and signed URL expiry. SendOwl Help Center

If you tell me roughly how large your builds are (e.g. 2 GB, 20 GB, 100 GB), how many sales/month you expect, and whether you already have a website/Stripe checkout, I can narrow this down to the most economical architecture.

For a small indie studio selling large downloadable builds + game keys, I’d look primarily at SendOwl and Lemon Squeezy. The right choice depends on whether file delivery or licensing/commerce is the bigger concern.

My shortlist

SendOwl is probably the closest match if you already have your own website/store and mainly need a secure delivery layer. It supports software and archive files, large-file delivery, expiring/time-limited download links, download limits, and license-key management. SendOwl Help Center SendOwl SendOwl Help Center

One particularly useful setup is private Amazon S3 + SendOwl: keep the actual game builds in a private S3 bucket, and let SendOwl generate time-limited signed download URLs. That means customers never get a permanent public S3 URL. SendOwl Help Center

Lemon Squeezy is attractive if you want the commerce side handled too. It can host your ZIP/build files, automatically deliver them after purchase, generate license keys, and enforce activation limits. Its licensing API also lets your game itself validate and activate keys. LemonSqueezy Lemon Squeezy Docs Lemon Squeezy Docs

itch.io makes sense if you want a game-native ecosystem rather than simply a delivery service. Its download keys are unique URLs, and account-linked keys can only be viewed by their owner while logged in. It also has APIs for purchase verification. itch.io itch.io

What I'd use for your situation

If you're selling directly from your own studio website, I'd lean toward:

Your website → payment/checkout → SendOwl → private S3 → expiring download → license key

For example:

1. Customer purchases Game X.
2. Your payment system confirms the transaction.
3. Customer receives a unique download page.
4. SendOwl provides a time-limited download URL to the build.
5. The customer receives a unique game key.
6. Your game optionally phones home to validate the key/activation.
7. Refunds or revoked orders can have their download access removed.

That gives you considerably more control than simply putting a ZIP behind a permanent URL. SendOwl explicitly supports download limits, expiration, revocation, and private S3 delivery. SendOwl Help Center SendOwl Help Center

One important distinction: secure file delivery can't really prevent a legitimate customer from copying a game after they've downloaded it. It primarily protects the distribution channel—preventing leaked URLs, unauthorized downloads, and easy sharing. If you also need to control how many machines can run the game, that's where license activation becomes important; Lemon Squeezy, for example, supports configurable activation limits and an API for validating keys. Lemon Squeezy Docs Lemon Squeezy Docs

If you tell me roughly build size (e.g. 5 GB vs 100 GB), monthly sales/downloads, whether you're already using Stripe, and whether you need Steam/Epic-style keys, I can narrow this down to a specific architecture and compare the likely costs.

itch.io makes sense if you want a game-native ecosystem rather than simply a delivery service. Its download keys are unique URLs, and account-linked keys can only be viewed by their owner while logged in. It also has APIs for purchase verification.

What I'd use for your situation

If you're selling directly from your own studio website, I'd lean toward:

Your website → payment/checkout → SendOwl → private S3 → expiring download → license key

For example:

For a small indie studio selling large downloadable game builds plus license/activation keys, I’d generally choose Cloudflare R2 + a small delivery API rather than a generic file-sharing service.

My recommendation

Cloudflare R2 is a particularly good fit for the file-delivery layer.

• Large files: R2 supports objects up to 5 TiB, with multipart uploads for large files and resumability. Cloudflare Docs Cloudflare Docs
• Secure downloads: Keep your builds private and generate short-lived presigned download URLs after verifying the customer's order/key. Cloudflare Docs Cloudflare Docs
• Bandwidth economics: R2 doesn't charge traditional egress/data-transfer fees, which is attractive when customers are downloading 20–100+ GB games. Cloudflare Docs Cloudflare Docs
• Easy to integrate: It's S3-compatible, so you can use standard AWS SDKs and tooling without building your own storage system. Cloudflare Docs
• No need to expose your storage: Your customer sees something like download.yourgame.com/..., while your backend controls who gets access.

The architecture I'd use

Customer purchases game
        ↓
Your store / payment system
        ↓
Order + license database
        ↓
Customer clicks "Download"
        ↓
Your API verifies entitlement
        ↓
Generate short-lived R2 signed URL
        ↓
Customer downloads directly from R2

I'd keep three things separate:

1. Build storage — R2
2. Entitlement/key management — your database/backend
3. Payment/storefront — whatever you're already using

That separation is important. A download URL should not itself be the customer's permanent license.

Security setup I'd recommend

For a paid game, I wouldn't email a permanent R2 URL.

Instead:

• Keep the R2 bucket private.
• Customer authenticates to your site or enters their order/license information.
• Your backend checks that they own the game.
• Generate a signed URL valid for, say, 15–60 minutes.
• Let the URL download the build directly from R2.
• Rate-limit requests for new URLs.
• Log downloads and flag obvious abuse.
• Give customers a way to regenerate a download link when they lose it.
• Put a SHA-256 checksum alongside each build so customers/your launcher can verify the download.
• Never put your R2/API credentials in the client or download URL generation code.

Cloudflare specifically warns that presigned URLs are effectively bearer tokens: anyone possessing one can use it until it expires, so expiration and handling matter. Cloudflare Docs

R2 vs. AWS S3

R2 would be my default for an indie studio, particularly if you're expecting lots of downloads.

AWS S3 is also an excellent choice and has essentially the same fundamental pattern: private objects + time-limited presigned URLs. AWS Documentation

I'd pick S3 instead if you're already heavily invested in AWS or want to build around AWS's broader ecosystem.

One important distinction

If by "software" you mean "I don't want to build any of this myself", then I'd look at a game-specific distribution/store platform rather than raw object storage.

If you mean "we have our own storefront and need the underlying technology to reliably deliver 50–100 GB builds", then my answer is:

Cloudflare R2 + your own entitlement API + expiring signed downloads.

That's a relatively inexpensive, scalable architecture and gives you much more control than sending customers Google Drive/Dropbox-style links.

If you tell me what you're using for the storefront/payment system (Shopify, WooCommerce, Stripe, custom, itch.io, etc.) and roughly how large your builds are, I can recommend the exact stack—including key generation, download authentication, CDN, and approximate monthly cost. developers.cloudflare.com

For a small indie studio selling downloadable game builds + keys, I’d separate the problem into commerce/license management and large-file delivery.

My recommendation

Best “just make it work” option: lemonsqueezy.com

It is particularly well suited if you want one service to handle checkout, license keys, and delivery. Lemon Squeezy can issue license keys automatically and securely deliver purchased files. Its current product-file limit is 5 GB total per product, though you can attach multiple files. Its download URLs are signed, expire after an hour, and are rate-limited. LemonSqueezy Lemon Squeezy Docs Lemon Squeezy Docs

If your game builds are larger than 5 GB, or you expect substantial download volume, I'd instead use:

cloudflare.com + your own small download service

R2 is much more flexible for large game builds: individual objects can be up to 5 TiB, with multipart/resumable uploads for large files. More importantly for games, R2 currently has no egress bandwidth charges, which can make a huge difference when customers download tens or hundreds of GB. Cloudflare Docs Cloudflare Docs Cloudflare Docs

You'd have your server verify the customer's purchase/key and then issue a short-lived presigned download URL. R2 supports presigned URLs specifically for this pattern, with expirations from seconds up to 7 days. Cloudflare Docs Cloudflare Docs

What I'd choose for an indie studio

The architecture I'd recommend for a serious indie storefront is:

Storefront → payment → entitlement/license record → authenticated download endpoint → short-lived R2 URL → game ZIP/installer

Don't give customers a permanent public URL to the build. Instead, authenticate the purchase/key, generate a temporary signed URL, and let the customer's browser download directly from R2. That keeps the enormous file transfer off your application server. Cloudflare Docs Cloudflare Docs

One other important point: file delivery and DRM are different problems. Signed URLs can stop casual unauthorized sharing of your download endpoint, but once someone has legitimately downloaded an unencrypted game build, you can't reliably prevent them from copying it. License validation inside the game is a separate layer.

If you tell me roughly (1) build size, (2) expected monthly downloads, (3) whether you already have a storefront/payment provider, and (4) Steam/GOG/itch vs. your own store, I can recommend a specific stack and estimate the monthly cost.

For a small indie game studio, I’d shortlist SendOwl and Lemon Squeezy. If your main concern is secure delivery of large builds, rather than storefront/payment features, I’d lean SendOwl + private S3.

My recommendation

1. SendOwl — best fit for a studio selling directly from its own site

SendOwl is purpose-built for digital goods, including software and license keys. It supports expiring download access, download-count limits, revocation, and license-key delivery. SendOwl Help Center SendOwl Help Center

The particularly nice setup for games is:

Your website → SendOwl checkout → SendOwl-secured download → private Amazon S3 bucket

SendOwl can generate time-limited signed S3 URLs while keeping the actual game files private. SendOwl Help Center

For large builds, its current documentation says files can be uploaded via SFTP beyond the 1 GB dashboard-upload threshold, and its business plans advertise files up to 50 GB. SendOwl Help Center SendOwl

sendowl.com

2. Lemon Squeezy — best if you also want payments/tax handling

Lemon Squeezy is attractive if you want a more complete commerce platform. It supports software license keys and securely delivered downloads; its download URLs are signed, expire after an hour, and are rate-limited. Lemon Squeezy Docs LemonSqueezy

The catch for games is the 5 GB total file allowance per product, which could become restrictive for modern PC builds. Lemon Squeezy Docs

lemonsqueezy.com

What I'd actually build

For a studio distributing, say, 5–50 GB Windows/macOS/Linux builds, I'd use:

• Checkout/payment: your existing store or SendOwl
• File storage: private Amazon S3
• Delivery: short-lived signed URLs
• Authentication: order/customer entitlement checked before generating the URL
• Build files: versioned ZIP/installer files rather than publicly accessible URLs
• Keys: unique per-purchase license keys
• Downloads: reasonable rate limits + expiration, but allow legitimate customers to re-download
• CDN: CloudFront in front of S3 if download volume becomes significant
• Updates: separate build/version objects so you can revoke or retire old builds without breaking customers unnecessarily

The important security principle is never give customers a permanent URL to the S3 object. Keep the bucket private and issue temporary signed URLs after verifying their entitlement. SendOwl explicitly supports this architecture. SendOwl Help Center

If you tell me roughly how big your builds are (e.g. 2 GB vs 30 GB), your monthly download volume, and whether you're already using Stripe/Shopify/your own checkout, I can recommend the cheapest architecture and estimate the bandwidth/storage cost.

Your website → SendOwl checkout → SendOwl-secured download → private Amazon S3 bucket

SendOwl can generate time-limited signed S3 URLs while keeping the actual game files private. SendOwl Help Center

For large builds, its current documentation says files can be uploaded via SFTP beyond the 1 GB dashboard-upload threshold, and its business plans advertise files up to 50 GB. SendOwl Help Center SendOwl

sendowl.com

2. Lemon Squeezy — best if you also want payments/tax handling

Lemon Squeezy is attractive if you want a more complete commerce platform. It supports software license keys and securely delivered downloads; its download URLs are signed, expire after an hour, and are rate-limited. docs.lemonsqueezy.com lemonsqueezy.com

The catch for games is the 5 GB total file allowance per product, which could become restrictive for modern PC builds.

For a small indie studio, I’d split this into two very different cases:

Best overall: itch.io

If you’re selling DRM-free downloadable builds directly to customers, itch.io is probably the best fit.

• Customers get a unique download key/access page after purchase.
• You can distribute builds, demos, DLC, bonuses, and Steam keys from the same purchase.
• Download keys can be generated individually or in bulk, and individual keys can be revoked/tracked. itch.io itch.io
• You can upload builds directly rather than maintaining your own file-hosting infrastructure.
• For large games, itch.io's butler/wharf distribution system supports resumable uploads and binary patching, so subsequent updates don't necessarily require customers to download the entire game again. itch.io
• You retain ownership of your uploaded content, and itch.io doesn't add DRM to the files. itch.io

For an indie studio, that's a pretty compelling combination of commerce + access control + CDN/file delivery + key management + game-specific distribution tooling.

If you're building your own storefront: S3 + signed URLs

If you already have your own website/checkout and want complete control, I'd use Amazon S3 for the actual files, with short-lived presigned URLs generated only after the customer's purchase has been authenticated.

The architecture would look roughly like:

Customer → your storefront → payment verification → entitlement check → short-lived signed S3 download URL → game ZIP/installer

S3 presigned URLs let you expose a private object temporarily without making the underlying bucket public. They can also be configured to expire, which is much safer than putting permanent download URLs on your website. AWS Documentation

I'd additionally use:

• Private S3 buckets — never public-read game files
• Short-lived signed URLs
• A database recording each customer's entitlement
• Rate limiting/download monitoring
• Checksums for every release
• CloudFront in front of S3 for global delivery
• Separate objects/releases for Windows/macOS/Linux
• Automated upload/signing/release pipeline
• Optional per-customer download tokens if you need stronger abuse tracking

This is more work, but gives you substantially more control.

What I'd choose

One important distinction: don't treat "secure file delivery" as equivalent to DRM. Once a customer can download an executable, you can't prevent them from copying it. What you can secure is the authorization to obtain the file, prevent accidental public exposure, revoke entitlements where possible, and make abuse substantially harder.

For a small studio, I'd therefore start with itch.io unless you have a strong reason to own the entire commerce/delivery stack. Its download-key model is unusually well suited to games, including external Steam keys and private/press access. itch.io itch.io

If you tell me roughly how large your builds are (e.g. 5 GB vs. 100 GB), your monthly downloads, and whether you're selling through your own website or Steam/itch.io, I can recommend a concrete stack and estimate the delivery cost.

For a small indie game studio, the “best” solution depends on whether you want a storefront that handles everything or your own store with secure file delivery infrastructure. For large game builds (5–50+ GB), I would avoid ordinary web hosting and use a service designed for digital distribution.

My top recommendations

1. itch.io — best low-maintenance indie option

itch.io

Best for: DRM-free builds, demos, beta access, press keys, small studios that want minimal infrastructure.

Pros:

• Upload builds directly and sell them.
• Handles download access and purchase ownership.
• Supports download keys and bulk key generation for promotions/press. itch.io
• Very indie-friendly workflow; you can create a game page and distribute files without building your own backend. itch.io

Cons:

• Less control over branding/customer data than running your own store.
• Less ideal if you want a premium “yourstudio.com/store” experience.

Good fit: “We make games, not commerce infrastructure.”

2. SendOwl — best for your own website/store

sendowl.com

Best for: selling directly from your website while outsourcing secure delivery.

Useful features:

• Secure download links.
• Expiration/download limits.
• License key delivery.
• Delivery infrastructure designed for digital products. Sendowl Dev

Typical setup:

1. Customer pays on your website.
2. Payment triggers SendOwl delivery.
3. Customer receives a protected download link and/or game key.
4. Your studio keeps the customer relationship.

This is usually the sweet spot for a small studio that wants a professional storefront without building a licensing system.

3. Cloud storage + CDN + your own delivery layer — best for technical teams

Example stack:

• Amazon Web Services S3 + CloudFront
• Cloudflare R2 + CDN

aws.amazon.com
cloudflare.com

Best for: studios comfortable maintaining backend systems.

You can build:

• Signed download URLs.
• Customer accounts.
• Patch/update servers.
• Regional downloads.
• Analytics.

Pros:

• Maximum control.
• Scales well for launch spikes.
• Often cheaper at high volume.

Cons:

• You own the engineering and security work.

4. Steam — best if your game belongs in a launcher ecosystem

partner.steamgames.com

If you are selling Steam keys rather than DRM-free builds, Steam is often the easiest customer experience:

• Automatic updates.
• Cloud saves.
• Community features.
• Familiar checkout/library.

You can also sell keys elsewhere and let customers redeem them on Steam, though you still need a separate store/key delivery system for direct sales.

What I would choose for a small indie studio

If you sell mostly DRM-free builds:

itch.io + optional SendOwl

• itch.io for community, demos, bundles, and easy distribution.
• SendOwl for your own website sales.

If you sell Steam keys:

Your website + SendOwl + Steam key inventory

Workflow:

• Buy → payment confirmed → automatically send Steam key.
• Keep a backup pool of keys.
• Log every key redemption.

If your builds are huge (20GB+):

Use:

• A CDN-backed delivery service, or
• Object storage + CDN.

Avoid:

• Dropbox links
• Google Drive links
• Direct server downloads

They tend to fail under launch-day traffic and provide poor control over abuse.

Security checklist for game downloads

Whatever you choose, look for:

• ✅ Signed/expiring download URLs
• ✅ Download limits or abuse protection
• ✅ Resume support for interrupted downloads
• ✅ Purchase-to-download authentication
• ✅ Key inventory tracking
• ✅ Refund/revocation handling
• ✅ CDN delivery
• ✅ Separate builds for customers, press, and testers

For most small studios, I’d start with itch.io if you want simplicity or SendOwl + your own site if you want a direct-sales business. You can migrate to a custom S3/CDN setup later once download volume justifies the engineering effort.

For a small indie studio selling downloadable game builds + activation keys, the “best” solution is usually not a simple file host. You want a system that handles:

• Secure downloads (expiring links, signed URLs, download limits)
• Large files (5–50+ GB builds)
• Resumable downloads
• Key/license delivery
• Refunds and revoked access
• Customer records
• CDN performance during launches

The right choice depends on whether you want a hosted solution or to build your own stack.

Best overall for most indie studios: SendOwl + CDN storage

Good fit if you want to sell from your own website without building backend infrastructure.

Pros:

• Secure download links
• Automatic delivery after payment
• License/key delivery workflows
• Handles digital products without you maintaining servers
• Good for DRM-free builds and patches

Cons:

• Monthly cost
• Less control than a custom pipeline

SendOwl## Best if you want maximum control: Object storage + CDN + your own checkout

A common professional indie setup:

• Storage:

• Amazon Web Services S3
• Cloudflare R2
• Backblaze B2
• Delivery:

• CDN-backed signed download URLs
• Your own customer portal
• Payments:

• Stripe Checkout
• Paddle
• Lemon Squeezy

Pros:

• Cheapest at scale
• Full control
• Easy to automate patches and builds
• Can integrate with your launcher later

Cons:

• Requires engineering time

Best “indie game native” option: itch.io

If your main goal is selling indie games rather than running your own store:

Pros:

• Built for indie games
• Upload builds directly
• Handles purchases and downloads
• Supports download keys
• Simple customer experience

Cons:

• Less ownership of the storefront/customer relationship

itch.io## Best for software-style licensing: Linkcase or similar license-focused tools

Useful if you sell:

• DRM-free builds
• Your own launcher
• Per-customer licenses
• Frequent updates

These are closer to “software distribution” than “game storefront.” Linkcase

What I would choose for a small studio

If you have 1–3 games and want simplicity:

itch.io + Steam + SendOwl (for direct sales)

If you have your own website and expect growth:

Stripe/Paddle + Cloudflare R2/S3 + signed downloads

If you plan to build a launcher:

Custom backend + object storage + entitlement system

A good minimum architecture:

Customer buys game
        ↓
Payment provider confirms purchase
        ↓
Your backend creates entitlement
        ↓
Customer receives:
  - download link
  - key/license
  - account access
        ↓
Files served from CDN storage

Avoid:

• Google Drive/Dropbox links (easy to share, poor at scale)
• Emailing ZIP files
• Permanent public URLs
• Putting Steam keys directly into order databases without encryption

For most indie teams, I’d lean toward a hosted digital delivery service first, then migrate to S3/R2 + your own entitlement system once sales volume justifies the engineering work.

If you have your own website and expect growth:

Stripe/Paddle + Cloudflare R2/S3 + signed downloads

If you plan to build a launcher:

Custom backend + object storage + entitlement system

A good minimum architecture:

Customer buys game
        ↓
Payment provider confirms purchase
        ↓
Your backend creates entitlement
        ↓
Customer receives:
  - download link
  - key/license
  - account access
        ↓
Files served from CDN storage

Avoid:

For a small indie studio selling downloadable game builds + license/Steam keys, I’d shortlist these:

My recommendation: Lemon Squeezy

If you're selling directly from your own website, Lemon Squeezy is probably the best fit.

It combines checkout, payment processing, digital-file hosting, secure download delivery, and license-key management instead of making you build those pieces yourself. Its current documentation says a product can have unlimited files totaling up to 5 GB, with files securely delivered after purchase. Lemon Squeezy Docs LemonSqueezy

The particularly useful part for a game studio is its licensing system: you can automatically issue unique keys, set activation limits, set license duration, and manage/revoke keys. Lemon Squeezy Docs

It also uses signed download URLs and rate limiting to make casual link sharing/abuse considerably harder. LemonSqueezy

lemonsqueezy.com

If your games are already centered around itch.io

I'd seriously consider just using itch.io. It's unusually well suited to indie games: you upload the builds, sell from a custom game page, and purchasers automatically get download keys. Keys can also be generated for press copies, giveaways, etc. itch.io itch.io

It also has an API for checking download-key ownership, which is useful if your launcher or website needs to verify purchases. itch.io

itch.io

One important consideration: build size

If your game builds are 10–50+ GB, I wouldn't make Lemon Squeezy or Gumroad the actual file CDN. I'd separate the two systems:

Store/payment → entitlement/key → private object storage/CDN → short-lived signed download URL

For example, you could put builds in S3-compatible object storage + CDN and have your backend issue an expiring download URL only after verifying the customer's purchase. That's more scalable and gives you much more control over bandwidth, resumable downloads, patching, and regional delivery.

For builds under roughly 5 GB, though, I'd favor Lemon Squeezy for an owned storefront or itch.io for the simplest indie-game experience.

If you tell me roughly how large your builds are (e.g. 2 GB, 15 GB, 80 GB) and whether you need Steam keys as well as direct downloads, I can recommend the specific setup I'd use for a small studio.

For a small indie studio selling game builds + license/activation keys, I’d prioritize a service that combines secure file delivery, large-file/CDN support, expiring links, and key management rather than using Dropbox/Google Drive links.

My shortlist

🥇 What I'd choose

If your builds are generally under 5 GB: I'd start with lemonsqueezy.com.

It can host the actual downloadable files, deliver them securely after purchase, and issue/manage license keys. Its current documentation says each product can have unlimited files totaling up to 5 GB, and the downloads are securely available to purchasers. Lemon Squeezy Docs LemonSqueezy

That gives you a very nice indie-studio workflow:

Customer pays → order verified → key issued → secure download → customer can reinstall later

No need to build your own download server.

🥈 If your games are 10–50+ GB

I'd look seriously at sendowl.com.

SendOwl specifically supports large-file delivery and says it has no artificial file-size/storage restrictions. It also provides expiring download links and license-key generation/delivery. SendOwl SendOwl

That's a better fit if you're shipping, say:

• 8–20 GB PC builds
• 30+ GB deluxe editions
• separate Windows/macOS/Linux builds
• large DLC/texture packs
• frequent patches

For games, resumable/reliable downloads and CDN delivery matter considerably more than they do for ordinary digital products.

🧩 If you already have your own checkout

There's another interesting architecture: your existing store/payment system + a dedicated license-gated file-delivery service.

For example, AquaDrop binds downloads to your license keys and generates very short-lived signed URLs. You retain your own checkout and payment system, while it handles the actual file delivery. It also supports download caps, revocation, webhooks and version channels. Aquadratic

That's attractive if you already have a website/store and don't want to migrate it to a merchant-of-record platform.

One thing I would not do

I wouldn't put your game ZIP on a normal public S3/Cloudflare/website URL and email customers the permanent URL.

Instead, use:

Private storage → authenticated entitlement → temporary signed URL → CDN → download

That way, if someone posts the URL on Reddit or Discord, the URL eventually becomes useless. Temporary signed/tokenized links are a standard recommendation for protecting digital downloads. Shopify

My recommendation by studio size

• Tiny studio, want zero infrastructure: Lemon Squeezy
• Tiny studio, games are >5 GB: SendOwl
• Already have checkout + your own key system: AquaDrop or custom signed-URL delivery
• Want the indie-game storefront/community: itch.io — it supports downloadable builds and external key-based products, although upload limits can require contacting them for increases. Itch.io
• Growing studio with lots of builds/patches: eventually move toward private object storage + CDN + your own entitlement/license API

If you tell me roughly (1) average build size, (2) monthly sales/downloads, (3) whether you already have a storefront, and (4) whether the keys are Steam keys or your own activation keys, I can narrow this down to the cheapest/best architecture for your studio, including estimated monthly costs.

For example, AquaDrop binds downloads to your license keys and generates very short-lived signed URLs. You retain your own checkout and payment system, while it handles the actual file delivery. It also supports download caps, revocation, webhooks and version channels. aquadratic.com

That's attractive if you already have a website/store and don't want to migrate it to a merchant-of-record platform.

One thing I would not do

I wouldn't put your game ZIP on a normal public S3/Cloudflare/website URL and email customers the permanent URL.

Instead, use:

Private storage → authenticated entitlement → temporary signed URL → CDN → download

For a small indie studio selling large downloadable game builds plus activation keys, I’d strongly consider itch.io as the simplest all-in-one solution.

My recommendation

1. itch.io — best overall for an indie studio

It handles the things you'd otherwise have to build yourself:

• Hosts the actual game files, rather than making you operate your own download server.
• Gives each purchase a unique download page.
• Buyers can re-download future versions from that purchase page.
• Supports external keys such as Steam keys alongside your downloadable builds. itch.io itch.io
• Has download keys for press, testers, Kickstarter backers, giveaways, etc.
• Its butler distribution system supports large builds, resumable uploads, and binary patching, so customers don't necessarily have to redownload the entire game after an update. itch.io
• It doesn't impose DRM on the files you upload. itch.io

There's also a nice security advantage: you aren't emailing a permanent public S3/Dropbox-style URL to customers. Purchases are associated with unique download pages, and access can be controlled through itch's system. itch.io itch.io

itch.io

When I'd use something else

If you're selling directly from your own website and don't want to use itch.io as the storefront, I'd build the delivery layer around:

Object storage + CDN + signed/expiring downloads + a digital-commerce platform

For example, your game files can live in S3-compatible object storage while your commerce system handles payment, entitlement, and key delivery. The important security feature is that customers receive short-lived signed download URLs, rather than permanent bucket URLs.

That's more flexible and gives you complete control over branding and your customer relationship, but it's considerably more engineering/operations work.

What I would avoid

I wouldn't use Google Drive, Dropbox links, WeTransfer, or a generic file-sharing service as your customer delivery infrastructure. They're fine for sending a build to a tester, but they're awkward for a commercial product because you need purchase-based access control, revocation, version management, reliable large downloads, and ideally differential updates.

One important itch.io caveat

If you're primarily selling Steam keys, itch.io explicitly prefers that you also provide the game files directly through itch.io rather than making the page essentially a key-distribution page. itch.io itch.io

So for an indie studio, my rough ranking would be:

1. itch.io — best if you want the least infrastructure and a game-native storefront.
2. Your own store + object storage/CDN + signed URLs — best if you want maximum control and already have a web storefront.
3. Dedicated digital-product delivery service — useful if you primarily need secure file fulfillment rather than game-specific distribution.

If you tell me roughly how large your builds are (e.g. 5 GB, 50 GB, 150 GB), whether you sell through your own website or Steam/itch.io, and roughly how many downloads/month, I can recommend a specific architecture and estimate the monthly hosting/delivery cost.

If you're selling directly from your own website and don't want to use itch.io as the storefront, I'd build the delivery layer around:

Object storage + CDN + signed/expiring downloads + a digital-commerce platform

For example, your game files can live in S3-compatible object storage while your commerce system handles payment, entitlement, and key delivery. The important security feature is that customers receive short-lived signed download URLs, rather than permanent bucket URLs.

That's more flexible and gives you complete control over branding and your customer relationship, but it's considerably more engineering/operations work.

What I would avoid

I wouldn't use Google Drive, Dropbox links, WeTransfer, or a generic file-sharing service as your customer delivery infrastructure. They're fine for sending a build to a tester, but they're awkward for a commercial product because you need purchase-based access control, revocation, version management, reliable large downloads, and ideally differential updates.

One important itch.io caveat

If you're primarily selling Steam keys, itch.io explicitly prefers that you also provide the game files directly through itch.io rather than making the page essentially a key-distribution page.

So for an indie studio, my rough ranking would be:

For a small indie studio, I’d generally avoid building your own file-delivery infrastructure from scratch. The best choice depends on whether you want an all-in-one storefront or already have your own checkout.

My picks

1. Best turnkey option: Lemon Squeezy

For a small studio, this would probably be my default recommendation if you're also selling the games through the same system.

Lemon Squeezy supports digital products, license keys, variants, and downloadable files. Its customer downloads are protected with signed URLs; its documentation says download URLs expire after one hour and are rate-limited. Lemon Squeezy Docs Lemon Squeezy Docs

It also supports uploading multiple files to a product, with up to 5 GB total per product according to its current documentation. Lemon Squeezy Docs

docs.lemonsqueezy.com

Caveat: If your games routinely exceed 5 GB, I'd look at R2/S3 instead.

2. Best infrastructure choice: Cloudflare R2

If you have your own website and checkout, R2 is probably what I'd build around.

Put your game builds in a private R2 bucket and, after verifying that the customer owns the game/key, have your server generate a short-lived presigned download URL.

The customer gets something like:

your-site.com/download/... → your backend authenticates the purchase → temporary R2 URL → game download.

R2 supports presigned GET URLs specifically for this use case, and they can expire anywhere from seconds to days. Cloudflare Docs Cloudflare Docs

For large builds, R2 also supports multipart uploads up to 5 TiB, with resumable/parallel uploads. Cloudflare Docs

developers.cloudflare.com

The important security point is don't make the game files publicly accessible. Treat the signed URL itself as a bearer credential; keep its lifetime reasonably short. Cloudflare Docs

3. S3 if you're already an AWS shop

S3 is equally capable. Its presigned URLs provide time-limited access to private objects without giving customers AWS credentials. AWS also specifically documents their use for downloading large objects. AWS Documentation AWS Documentation

docs.aws.amazon.com

I'd choose S3 over R2 if you're already heavily invested in AWS or need its broader ecosystem. Otherwise, R2 is attractive for a small studio because the architecture is simpler.

The architecture I'd use for an indie game

For a studio selling, say, 2–50 GB Windows/Linux/macOS builds, I'd do:

Store/checkout → order database → entitlement/license → download API → private object storage → expiring download URL

And I'd make the download system:

• Private by default — no publicly guessable build URLs.
• Entitlement-based — the API checks that the customer's order/key actually owns that particular game/version.
• Short-lived URLs — e.g. 15–60 minutes rather than permanent links.
• Rate-limited — prevent one leaked link from becoming an unlimited mirror.
• Version-aware — /game/v1.2.3/windows, /game/v1.2.3/linux, etc.
• Checksum-published — give customers SHA-256 hashes so corrupted downloads can be detected.
• CDN-backed where appropriate — don't make your application server proxy multi-gigabyte files.
• Resumable — particularly important for 20–50+ GB builds.

One subtle point: expiring URLs don't prevent piracy. Once a legitimate customer downloads a build, they can copy it. The goal is to prevent unauthorized access to your distribution infrastructure, not make downloaded files impossible to share.

What I'd choose

If you're starting from scratch and want the least engineering: Lemon Squeezy.

If you already have a website/checkout and want a professional download system you control: Cloudflare R2 + your own entitlement API.

If you tell me roughly how large your builds are (e.g. 5 GB vs 50 GB), monthly sales/downloads, whether you already have Stripe/another checkout, and whether you need Steam/Epic-style license keys, I can recommend a specific architecture and estimate the monthly cost.

Caveat: If your games routinely exceed 5 GB, I'd look at R2/S3 instead.

2. Best infrastructure choice: Cloudflare R2

If you have your own website and checkout, R2 is probably what I'd build around.

Put your game builds in a private R2 bucket and, after verifying that the customer owns the game/key, have your server generate a short-lived presigned download URL.

The customer gets something like:

your-site.com/download/... → your backend authenticates the purchase → temporary R2 URL → game download.

R2 supports presigned GET URLs specifically for this use case, and they can expire anywhere from seconds to days. Cloudflare Docs Cloudflare Docs

For large builds, R2 also supports multipart uploads up to 5 TiB, with resumable/parallel uploads. Cloudflare Docs

developers.cloudflare.com

The important security point is don't make the game files publicly accessible. Treat the signed URL itself as a bearer credential; keep its lifetime reasonably short. Cloudflare Docs

3. S3 if you're already an AWS shop

S3 is equally capable. Its presigned URLs provide time-limited access to private objects without giving customers AWS credentials. AWS also specifically documents their use for downloading large objects. docs.aws.amazon.com docs.aws.amazon.com

docs.aws.amazon.com

I'd choose S3 over R2 if you're already heavily invested in AWS or need its broader ecosystem. Otherwise, R2 is attractive for a small studio because the architecture is simpler.

The architecture I'd use for an indie game

For a studio selling, say, 2–50 GB Windows/Linux/macOS builds, I'd do:

For a small indie studio selling large downloadable builds + license keys, I’d generally recommend Cloudflare R2 + a lightweight licensing/checkout system, rather than sending files directly from your web server.

My top pick: Cloudflare R2

Cloudflare R2 is particularly attractive for game builds because it is S3-compatible object storage designed for large files, and Cloudflare currently charges no egress bandwidth fees for R2. It supports objects up to 5 TiB and multipart uploads for large files. Cloudflare Docs Cloudflare Docs

The architecture I'd use is:

• Checkout: your existing store/payment provider
• Database: record which customer owns which game/build
• Storage: R2 holds the ZIP/installer files
• Download endpoint: your server authenticates the customer and generates a short-lived signed R2 URL
• Customer: downloads directly from R2, rather than through your server
• Keys: generate/validate a separate license key associated with the purchase

R2's presigned URLs are specifically designed for this: your server creates a temporary URL granting access to a particular object without exposing your storage credentials. Cloudflare Docs Cloudflare Docs

That gives you something like:

Customer purchases game
        ↓
Payment confirmed
        ↓
Your backend records entitlement
        ↓
Customer clicks "Download"
        ↓
Backend verifies entitlement
        ↓
Backend generates 15-minute signed URL
        ↓
Customer downloads 30 GB build directly from R2

This is considerably safer than putting a permanent /downloads/game.zip URL on your website.

For keys + checkout: Lemon Squeezy is worth considering

If you don't already have your own commerce/licensing infrastructure, Lemon Squeezy is a strong fit for an indie software/game studio.

It supports digital products and can automatically generate unique license keys for purchases, with configurable license length and activation limits. It also provides a License API for validating and activating keys from your game. Lemon Squeezy Docs Lemon Squeezy Docs

docs.lemonsqueezy.com

I'd therefore consider two setups:

One important distinction

Secure file delivery ≠ DRM.

A signed URL can prevent someone from casually sharing a permanent download link, but once a customer legitimately downloads a game, you can't prevent them from copying the files.

I'd separate the problems:

File security

• Private R2 bucket
• Short-lived signed URLs
• Never expose R2 credentials
• Don't put permanent build URLs in emails
• Rate-limit your download endpoint
• Keep old builds private unless customers are entitled to them

License security

• Unique key per purchase
• Activation limits if appropriate
• Server-side key validation
• Ability to revoke/refund keys
• Don't put the master licensing secret inside the game

R2 explicitly warns that presigned URLs should be treated as bearer tokens, so short expiration times and careful handling are important. Cloudflare Docs

What I'd build for an indie studio

If you have even a little engineering capability, my preference would be:

Storefront/payment → your backend → R2 → signed download

with license keys handled by your backend or Lemon Squeezy.

That gives you a relatively inexpensive infrastructure that can handle a sudden launch-day spike without making your application server shovel gigabytes of game data. R2's multipart upload system also supports resumable uploads and files up to roughly 5 TiB, which is far beyond typical game-build sizes. Cloudflare Docs

If you tell me roughly how big your builds are (e.g. 2 GB, 20 GB, 100 GB), how many sales/downloads you expect per month, and whether you're already using Shopify/Lemon Squeezy/Gumroad/Stripe/etc., I can recommend the best specific stack and give you an approximate monthly cost.

A signed URL can prevent someone from casually sharing a permanent download link, but once a customer legitimately downloads a game, you can't prevent them from copying the files.

I'd separate the problems:

File security

• Private R2 bucket
• Short-lived signed URLs
• Never expose R2 credentials
• Don't put permanent build URLs in emails
• Rate-limit your download endpoint
• Keep old builds private unless customers are entitled to them

License security

• Unique key per purchase
• Activation limits if appropriate
• Server-side key validation
• Ability to revoke/refund keys
• Don't put the master licensing secret inside the game

R2 explicitly warns that presigned URLs should be treated as bearer tokens, so short expiration times and careful handling are important.

What I'd build for an indie studio

If you have even a little engineering capability, my preference would be:

Storefront/payment → your backend → R2 → signed download

with license keys handled by your backend or Lemon Squeezy.

That gives you a relatively inexpensive infrastructure that can handle a sudden launch-day spike without making your application server shovel gigabytes of game data. R2's multipart upload system also supports resumable uploads and files up to roughly 5 TiB, which is far beyond typical game-build sizes.

For a small indie studio, I’d avoid building your own download system unless you have a strong reason to. The sweet spot is a digital-commerce platform that handles payment, entitlement, signed/expiring downloads, and license keys, while using CDN-backed storage for the actual game files.

My shortlist

• lemonsqueezy.com — best all-around choice

• Handles checkout, digital files, and software license keys in one system.
• Its download URLs are signed, expire after 1 hour, and are rate-limited. Lemon Squeezy Docs LemonSqueezy
• Has an API/webhooks, so you can connect purchases to your own account system, launcher, or fulfillment backend. Lemon Squeezy Docs
• Particularly attractive if you sell both downloadable builds and activation/license keys.
• sendowl.com — best if delivery is the main concern

• Specifically built around digital-product fulfillment.
• Provides unique download links, download restrictions, expiring links, and support for license codes. SendOwl SendOwl Help Center
• Supports large files; files over 1 GB can be uploaded through SFTP. SendOwl Help Center
• It can also sit in front of your own S3/server storage and enforce signed/expiring access. SendOwl Help Center
• itch.io — best if you want the simplest indie-game-native solution

• Excellent for DRM-free downloadable builds.
• Purchasers get unique download pages/keys, and you can distribute external keys such as Steam keys. itch.io itch.io
• It doesn't modify your uploaded files or impose DRM. itch.io
• Less compelling if you specifically want a highly customized storefront and fulfillment architecture.

What I'd choose

If your own website is the storefront, I'd start with Lemon Squeezy. It gives a small team the most functionality without having to build payment → entitlement → key generation → secure download infrastructure yourself.

If you're already happy with your payment system and primarily need secure delivery of 10–100+ GB game builds, I'd instead consider SendOwl in front of private object storage/CDN.

For a more technical setup, the architecture I'd recommend is:

Customer → checkout → purchase webhook → entitlement → short-lived signed download URL → private object storage/CDN

Critically, don't put your game ZIPs/DMGs/EXEs in a publicly accessible bucket and try to hide the URL. Keep the objects private and issue temporary signed URLs only after verifying the customer's entitlement.

If you tell me roughly how large your builds are (e.g. 2 GB vs. 80 GB), whether you're selling Steam keys too, and whether you already have Stripe/another payment processor, I can narrow this down to the best 2–3 options and compare their costs and security model.

For a small indie studio, I’d avoid building your own download system unless you have a strong reason to. You want three things handled reliably: payment → entitlement/key → large-file delivery.

My top picks

1. itch.io — best all-around for an indie studio

If you're comfortable selling through itch.io, this is probably the simplest choice.

• Hosts the actual game files, so you don't have to operate S3/CDN infrastructure.
• Purchasers automatically get a unique download entitlement.
• You can issue/revoke download keys for press, testers, backers, etc.
• Customers retain access to updated files after purchasing.
• You can distribute Steam keys alongside the downloadable build.
• It supports multiple platform builds and large downloadable games, although account/project upload limits can apply and can be increased by request. itch.io itch.io itch.io
• It doesn't impose DRM on uploaded files. itch.io

itch.io

For a small studio selling DRM-free PC/Mac/Linux builds, this would be my first choice.

2. Amazon S3 + CloudFront — best if you want your own storefront

If you already have your own website/store and want complete control, I'd use:

Your store → payment processor → entitlement database → CloudFront → private S3 bucket

The important security feature is signed CloudFront URLs. Your S3 bucket stays private, and after a successful purchase your server generates a temporary URL allowing the customer to download the particular file. AWS supports expiration times and other access restrictions for signed URLs. AWS Documentation

This is considerably more engineering work, but it's the architecture I'd choose if you're expecting substantial traffic or want the storefront/customer relationship to be entirely yours.

Security-wise, this is stronger than putting a permanent Dropbox/Google Drive URL in a customer's receipt.

3. A digital-commerce platform — best if payment/tax/checkout is the hard part

If you don't want to build the commerce side yourself, look at services designed around digital products. The important distinction is that you want digital-product entitlement + protected downloads, rather than merely a file-hosting service.

For a game studio, I'd prioritize:

1. Purchase verification/webhooks
2. Protected/expiring download links
3. Large-file/CDN support
4. Automatic resend of download links
5. Refund → entitlement revocation
6. Steam/external key management
7. Ability to replace a build without breaking existing customers
8. API/webhooks so you aren't locked into their storefront

What I would actually build

For your situation, I'd choose based on how important your own storefront is:

One thing I'd not recommend is simply emailing permanent download links or putting the game's ZIP behind a shared Google Drive/Dropbox link. You lose proper entitlement control, revocation, download analytics, and protection against link sharing.

If you tell me roughly (a) typical build size, (b) whether you already have a website/store, (c) whether you're selling Steam keys too, and (d) approximate monthly sales, I can narrow this down to 2–3 specific services and give you the likely cost and architecture for each.

3. A digital-commerce platform — best if payment/tax/checkout is the hard part

If you don't want to build the commerce side yourself, look at services designed around digital products. The important distinction is that you want digital-product entitlement + protected downloads, rather than merely a file-hosting service.

For a game studio, I'd prioritize:

For a small indie studio, I’d avoid sending customers directly to permanent file URLs. The best setup is usually object storage + short-lived signed download links + your existing checkout/key system.

My top pick: Cloudflare R2

developers.cloudflare.com is particularly attractive for game builds because you can store very large installers/ZIPs and serve them without paying Internet egress fees. R2 currently charges $0.015/GB-month for Standard storage, with 10 GB-month free each month, and Internet egress is free. Cloudflare Docs Cloudflare Docs

More importantly, R2 supports presigned URLs: your server can give a customer a URL that grants access to one specific file for a limited period, from 1 second up to 7 days. Your R2 credentials never go to the customer. Cloudflare Docs

A good architecture would be:

Customer buys game
       ↓
Your store/payment system
       ↓
Purchase recorded against customer/key
       ↓
Customer clicks "Download"
       ↓
Your server verifies purchase/key
       ↓
Generate 1–24 hour signed R2 URL
       ↓
Customer downloads large build directly from R2

That means your application server isn't sitting in the middle of a 30 GB download.

Runner-up: Amazon S3

aws.amazon.com is the more established choice and is extremely capable. S3 has the same basic signed-URL mechanism: you can grant temporary access to a specific object without changing your bucket policy or exposing AWS credentials. AWS Documentation

I'd choose S3 if you're already heavily invested in AWS or expect to build a more sophisticated backend around AWS. For a small studio starting from scratch, R2's lack of egress charges makes it very compelling for game downloads, where bandwidth can dwarf storage costs.

If you don't want to build the delivery system

If your priority is "we just want to sell games and have downloads work", rather than building infrastructure, I'd look at an established game storefront such as itch.io. Its download-key system associates purchases with access to the project's files, and it also supports generating download keys yourself. itch.io itch.io

That's substantially less engineering than building your own purchase → entitlement → signed-download system.

What I'd recommend for your studio

One important distinction: secure file delivery isn't the same thing as DRM. A signed URL can prevent someone from casually sharing a permanent download URL, but once a legitimate customer has downloaded your game, you generally can't prevent them from copying the files. If you're selling keys as well as downloadable builds, I'd separate the two systems: an entitlement/key system determines who owns the game, while R2 handles efficient delivery of the files.

If you tell me roughly build size (e.g. 5 GB vs. 100 GB), monthly downloads, whether you're using Stripe/Gumroad/etc., and whether customers need Steam keys, I can recommend a specific low-cost stack and architecture for your studio.

For a small indie game studio selling downloadable builds and keys, I’d usually avoid generic “file sharing” tools (Dropbox, Google Drive, WeTransfer) and use a digital product delivery platform or a CDN-backed storage setup. The best choice depends on how much control you want.

Best overall choices

1. SendOwl — best turnkey option for most indie studios

sendowl.com

Best if: you want customers to pay → instantly receive a secure download → optionally receive a key, with minimal engineering.

Pros:

• Built for digital goods delivery
• Supports large files
• Expiring download links
• Download limits/access controls
• Can deliver license keys
• Handles the customer-facing delivery flow SendOwl SendOwl

Cons:

• Monthly/platform fees
• Less flexibility than building your own pipeline

Good fit: a 1–10 person studio selling DRM-free builds, Patreon rewards, Kickstarter backer downloads, or direct sales.

2. itch.io — best for indie games specifically

itch.io

Best if: you want a simple indie-friendly storefront and community presence.

Pros:

• Designed specifically for indie games
• Hosts builds directly
• Supports paid downloads and keys
• Gives you a game page, analytics, and customer access tools itch.io

Cons:

• Less “your own store” feeling
• Less control over the customer relationship than a fully owned storefront

Good fit: early-stage studios, demos, small releases, bundles, and community-driven launches.

3. S3-compatible storage + CDN + your own checkout — best long-term architecture

Best if: you already have a website/store and want maximum control.

Typical stack:

• Object storage:

• Amazon Web Services S3
• Cloudflare R2
• Backblaze B2
• CDN:

• Cloudflare CDN
• Amazon CloudFront
• Delivery logic:

• Generate short-lived signed download URLs after purchase
• Store entitlement records
• Issue/revoke keys through your backend

Pros:

• Cheapest at scale
• Full control
• Works well for 20–100GB+ builds
• Easy to integrate with launchers/updaters

Cons:

• Requires engineering work

For example, large game publishers commonly use CDN-style delivery systems because reliable large-file distribution is a specialized problem. Akamai

4. License-key-focused services — best if keys matter more than files

If your main product is “buy a key, unlock a launcher/game,” look at services that combine entitlement management and delivery.

Examples:

• AquaDrop — focuses on license-key-gated downloads with signed URLs and revocation features. Aquadratic
• Linkcase — aimed at selling software/game binaries with keys and updates. Linkcase

What I’d choose for an indie studio

Security features you should require

Whatever you pick, look for:

• ✅ HTTPS downloads
• ✅ Expiring signed URLs
• ✅ Per-customer download links
• ✅ Download limits (optional)
• ✅ Ability to revoke access
• ✅ Resume support for interrupted downloads
• ✅ Checksums (SHA-256) for builds
• ✅ Separate key inventory from file hosting
• ✅ Audit logs for suspicious sharing

One thing I would not do: upload a 20GB game ZIP to your web server and email customers a permanent /downloads/game.zip link. It will eventually get shared, hammered, or become a support headache.

For a small indie team, my default recommendation would be:

Start: SendOwl or itch.io →
Scale: Cloudflare R2/S3 + CDN + your own entitlement system.

For a small indie studio selling downloadable game builds + keys, I’d avoid generic file-sharing services (Dropbox, Google Drive, WeTransfer, etc.). You’ll get a much better setup with private object storage + expiring download links + an automated fulfillment layer.

My top pick: Cloudflare R2

developers.cloudflare.com is probably the best balance of cost, security, scalability, and simplicity for an indie studio.

Your architecture would look roughly like:

Customer purchases → your store/backend verifies purchase → generates short-lived signed URL → customer downloads directly from R2

R2 supports presigned URLs specifically for this use case: your server creates a temporary URL for a particular file, while your R2 credentials never reach the customer. Cloudflare Docs Cloudflare Docs

That's particularly useful for large builds because your application server doesn't have to proxy a 20–100+ GB game download.

Other good choices

aws.amazon.com is the other obvious choice. S3's presigned URLs can provide time-limited access without making the bucket public, and they work directly in browsers/download clients. AWS Documentation AWS Documentation

How I'd build it

For an indie studio, I'd make the actual delivery system something like:

1. Store/payment system handles the purchase.
2. Your backend records the order and associates it with: - game
3. platform
4. version/build
5. license/key
6. customer/order ID
7. Game builds live in a private R2 bucket.
8. Customer clicks Download.
9. Your backend authenticates the customer/order.
10. Backend generates a short-lived presigned GET URL for the appropriate build.
11. Browser/download client downloads directly from R2.
12. Backend logs the download without ever exposing your storage credentials.

R2 presigned URLs can be restricted to a specific object and expiration period; Cloudflare currently documents expiration from 1 second up to 7 days. Cloudflare Docs

One important security point

Don't make the game files publicly accessible and try to hide the URL.

A presigned URL is effectively a bearer token—anyone who obtains it can use it until it expires. GitHub

I'd therefore use something like a 15–60 minute URL, while allowing the customer to request a fresh one from their order page. This also makes leaked download links much less useful.

For particularly valuable unreleased builds, you can go further with per-customer watermarking/build identifiers, download limits, authentication, and revocation.

What I'd choose for you

If you're selling on your own website, I'd choose:

Stripe/your storefront → small backend → Cloudflare R2 → presigned downloads

If you're primarily selling keys for Steam/Epic/etc., the file delivery may be secondary—you'd want your fulfillment system to generate/allocate the appropriate key and only expose builds where you actually need direct downloads.

If you tell me rough build size (e.g. 5 GB vs 100 GB), expected monthly downloads, where you're selling (Shopify/custom site/Gumroad/etc.), and whether you need DRM/key generation, I can recommend the specific stack and estimate what it should cost per month.

For a small indie studio, I’d avoid building your own download system unless you have a strong reason. The best choice depends on whether you want direct sales from your website, Steam-style key fulfillment, or simply secure file hosting.

Here are the strongest options:

Best overall for a small indie studio: SendOwl + your storefront

Best for: Selling DRM-free builds, soundtracks, art books, beta access, and license keys from your own site.

Why it fits indies:

• Secure, expiring download links
• Download limits (helps reduce casual sharing)
• Handles large files through delivery infrastructure/CDN-style hosting
• Can deliver license keys automatically
• Works with payment platforms and storefronts

A common setup:

1. Customer buys on your site
2. Payment succeeds
3. They receive: - game download link
4. Steam key (if applicable)
5. installer/patch files
6. purchase receipt

SendOwl## Best if you want a game-focused solution: itch.io

Best for: Indies, demos, playtests, DRM-free builds, and smaller releases.

Advantages:

• Built specifically for games
• Handles hosting and downloads
• Supports download keys and external keys
• Good community/discovery ecosystem
• Supports large builds and patching workflows

itch.io itch.ioA lot of small studios use:

• itch.io for demos/community
• Steam for the main release
• their own store for direct supporters

Best "professional software delivery" option: FastSpring or Paddle

Best for: Studios that are moving toward:

• multiple products
• subscriptions
• international tax handling
• licensing systems

More enterprise-oriented, but very polished.

Best if you already use Shopify: Linkcase

Best for: A studio that wants a branded store but doesn’t want to build download/license infrastructure.

Features aimed at software creators:

• binary delivery
• license key fulfillment
• update delivery
• download tracking

Linkcase## What I would avoid

Generic cloud storage links

Examples:

• Google Drive
• Dropbox
• OneDrive

Problems:

• links get shared
• weak entitlement control
• poor customer experience
• no automatic key delivery

Running your own file server

Possible, but you’ll need:

• signed URLs
• CDN configuration
• rate limiting
• abuse prevention
• payment integration
• key inventory management

Usually not worth the maintenance for a small team.

My recommendation by studio size

For most indie studios today, I’d use Steam for the main audience, itch.io for community/testing, and SendOwl (or similar) for direct sales from your own site. That gives you secure delivery without spending engineering time on a download system. SendOwl itch.io

If you tell me your typical build size (e.g., 2 GB vs 80 GB), engine (Unity/Unreal/Godot), and whether you sell Steam keys, DRM-free builds, or both, I can narrow it down.

For a small indie studio selling downloadable builds + keys, I’d usually avoid treating this as just “file storage.” You need a digital fulfillment system that handles:

• large files (5–50+ GB builds)
• resumable downloads
• expiring/private links
• purchase verification
• Steam/other platform key inventory
• refunds/revoking access
• customer emails and support trails

The best choice depends on whether you want a storefront, a custom store, or just a delivery backend.

Best overall options

itch.io is often the easiest fit for indie games because it combines storefront, file hosting, purchase access, and download keys. It also supports external keys such as Steam keys in addition to direct downloads. itch.io itch.io

My recommendations by studio size

1. Small indie team, first commercial release

Use: itch.io + Steam

Workflow:

1. Sell direct DRM-free builds on itch.io
2. Sell Steam keys where appropriate
3. Give press/backers/reviewers itch download keys
4. Let itch handle file delivery

Pros:

• almost no infrastructure
• built-in indie audience
• easy beta/press access
• fewer customer support headaches

Cons:

• less control over branding/customer data

itch.io

2. You have your own website and want a premium direct-sales setup

Use: SendOwl (or similar) + object storage

Typical architecture:

Customer pays
      ↓
Store checkout
      ↓
Payment verified
      ↓
Generate secure download link
      ↓
Customer downloads build
      ↓
Key delivered automatically

Recommended stack:

• Checkout: Shopify/WooCommerce/custom
• Delivery: SendOwl or your own service
• Files: Amazon S3 / Cloudflare R2
• CDN: CloudFront / Cloudflare
• Keys: encrypted inventory database

This gives you:

• customer ownership
• email list
• better margins
• control over bundles, DLC, soundtracks, supporter editions

SendOwl specifically targets digital products with secure links and key delivery workflows. SendOwl

3. You sell very large builds (20–100+ GB)

I would strongly consider:

Cloudflare R2 or Amazon S3 + CDN + a small fulfillment service

Avoid:

• Google Drive
• Dropbox links
• manually emailing ZIP files
• normal web hosting downloads

For games, important features are:

• HTTP range requests (resume downloads)
• CDN caching
• bandwidth scaling
• signed URLs
• checksum verification

A common pattern:

Build.zip
   ↓
Object storage
   ↓
Signed URL (expires in 24h)
   ↓
Customer download

For Steam keys specifically

Do not send keys manually from a spreadsheet.

Use:

• encrypted key inventory
• one-time assignment per order
• logging: - order ID
• customer email
• key issued
• timestamp

Also keep some reserve keys for:

• refunds
• replacement requests
• influencers
• press

itch.io supports bulk keys and external keys for workflows like this. itch.io

Security checklist

Whatever you choose:

✅ Use signed, expiring download URLs
✅ Limit downloads per purchase (for example 5–10)
✅ Store builds privately, never public URLs
✅ Keep SHA-256 checksums for every release
✅ Watermark special builds for press/review copies
✅ Separate customer downloads from internal QA builds
✅ Log every key redemption/download

My default recommendation for a small indie studio

• Launching your first few games: itch.io + Steam
• Growing a direct-to-player business: Shopify/custom checkout + SendOwl + S3/R2
• Shipping huge AAA-sized builds: custom S3/R2 + CDN delivery layer

The biggest mistake small studios make is building their own download system too early. Unless you already have thousands of customers per launch, a managed platform usually saves more time than it costs.

Whatever you choose:

✅ Use signed, expiring download URLs
✅ Limit downloads per purchase (for example 5–10)
✅ Store builds privately, never public URLs
✅ Keep SHA-256 checksums for every release
✅ Watermark special builds for press/review copies
✅ Separate customer downloads from internal QA builds
✅ Log every key redemption/download

My default recommendation for a small indie studio

• Launching your first few games: itch.io + Steam
• Growing a direct-to-player business: Shopify/custom checkout + SendOwl + S3/R2
• Shipping huge AAA-sized builds: custom S3/R2 + CDN delivery layer

The biggest mistake small studios make is building their own download system too early. Unless you already have thousands of customers per launch, a managed platform usually saves more time than it costs.

For a small indie studio, I’d generally avoid building a Dropbox/Google Drive-style delivery system. The sweet spot is object storage + short-lived signed download URLs, with your storefront/order system controlling who gets access.

My top pick: Cloudflare R2

developers.cloudflare.com is probably the best fit if you're comfortable having a developer wire it into your store.

Why:

• Large files: R2 supports objects up to 5 TiB, with multipart uploads for large files and resumability. Cloudflare Docs
• Private by default: Keep builds in a private bucket rather than exposing permanent public URLs.
• Temporary downloads: Your server can issue a presigned URL that only works for a limited period. R2 supports expirations from 1 second to 7 days. Cloudflare Docs
• Customers don't need R2 accounts.
• Your AWS credentials never go to the customer.
• Good for automated delivery: after a purchase, your backend can generate the appropriate download URL and email/display it.
• S3-compatible: You can use standard S3 tooling and SDKs.

The architecture I'd use is:

Customer buys game
       ↓
Your storefront / payment system
       ↓
Order validated
       ↓
Your download service
       ↓
Generate short-lived signed URL
       ↓
Customer downloads directly from R2

That means your application doesn't proxy a 20–50 GB game through your own server. The customer downloads directly from the storage provider.

R2 specifically recommends presigned URLs for this client-side download pattern. Cloudflare Docs

The important security distinction

Don't simply email something like:

https://cdn.yourstudio.com/game-v1.2.zip

if the game is supposed to be paid.

Instead, have your server give the purchaser something like a download page:

yourstudio.com/download/ORDER_TOKEN

The download endpoint verifies:

• the order is legitimate
• which product was purchased
• which platform/build they're entitled to
• whether the download token is still valid
• optionally, how many downloads they've made

Then it generates a short-lived R2 URL.

One important caveat: a presigned URL is effectively a bearer token. Anyone who obtains it can use it until it expires, so don't make the URLs permanent. Cloudflare Docs

What about AWS S3?

aws.amazon.com is the other obvious choice.

It's extremely capable and has the same fundamental architecture: private objects + presigned URLs. AWS explicitly supports time-limited browser downloads through presigned URLs. AWS Docs AWS Docs

I'd choose S3 over R2 if you're already heavily invested in AWS or expect to build a more elaborate backend around AWS.

For a small studio starting from scratch, though, I'd lean R2 for simplicity and cost structure.

If you don't want to build the delivery system

That's a different question, and there are some attractive options.

For an indie studio, I'd look at:

A particularly important distinction is file delivery vs. key management. If you're selling Steam keys, for example, you don't want the download system to be responsible for key inventory, redemption, refunds, etc. Keep those concerns separate.

What I'd build for your studio

If you're selling directly from your own website, I'd use:

Storefront/payment → order database → R2 → signed downloads

and have each product represented something like:

Game
 ├── Windows build
 ├── macOS build
 ├── Linux build
 ├── bonus content
 └── soundtrack

Each successful order gets entitlements such as:

ORDER-12345
 ├── game-windows
 ├── game-macos
 └── soundtrack

The customer sees a download page rather than raw storage URLs.

I'd also put SHA-256 checksums alongside the downloads so customers can verify that a multi-GB build arrived intact.

For really large builds, make sure your download mechanism supports HTTP range requests/resuming. That's much more important for a 30 GB game than it is for a 100 MB asset. R2's large-object tooling supports multipart/resumable transfers on the upload side, while S3 supports ranged object downloads. Cloudflare Docs AWS Docs

Bottom line

If you're a small studio and have someone who can do a modest amount of backend development: choose Cloudflare R2 + private buckets + short-lived signed URLs.

If you don't want to develop any of this: use a game/digital-product storefront that handles entitlement and delivery for you rather than trying to turn Google Drive, Dropbox, or a generic file-sharing service into a game distribution platform.

If you tell me what you're using for your storefront/payment processing (Shopify, WooCommerce, Stripe, Gumroad, your own site, etc.), typical build size, and whether the keys are Steam/Epic/GOG or your own keys, I can narrow this down to a specific setup and estimate the ongoing cost.

For a small indie studio, I’d avoid building file delivery from scratch unless you need a custom storefront. The best choice depends on whether you want a store to handle purchases/keys or just secure file delivery.

My picks

🥇 For your situation: R2 + signed downloads

If you're selling directly through your own website, Cloudflare R2 is probably my recommendation.

R2 is S3-compatible object storage designed for serving large amounts of data, and importantly for games, it has no egress bandwidth fees. developers.cloudflare.com

The architecture I'd use is:

Customer purchases → your backend records entitlement → backend generates short-lived signed URL → customer downloads directly from R2

The customer never gets your storage credentials. R2's presigned URLs can be restricted to a particular object and expiration time, and Cloudflare explicitly recommends them for time-limited downloads. developers.cloudflare.com

I'd make the URL something like 1–6 hours, rather than a permanent download URL. You can also require the customer to authenticate before generating it.

R2 encrypts stored objects with AES-256 and uses TLS for data in transit. developers.cloudflare.com

What I'd build around it

For each purchase:

Order
 └── entitlement
      ├── product = Game X
      ├── version = 1.4.2
      ├── customer = ...
      └── download permission
              ↓
        Your download API
              ↓
      signed R2 URL
              ↓
       Game ZIP / installer

I'd keep the R2 bucket private. Don't put the game files in a publicly readable bucket.

Also give every release a checksum (e.g. SHA-256) so your launcher/customer support can verify that a downloaded build isn't corrupted.

If you don't want to build any of this

I'd seriously consider itch.io. It already provides hosted game downloads, sales, and download keys; its download keys are URLs granting access to a project's files. itch.io

That's particularly attractive if you're a tiny team and would rather spend engineering time on the game than on entitlement systems, payment handling, download infrastructure, refunds, and customer support.

S3 is the alternative

S3 is technically excellent. AWS supports presigned URLs specifically for granting customers temporary access without changing bucket policies or giving them AWS credentials. docs.aws.amazon.com

The main reason I'd choose R2 over S3 for an indie game store is the bandwidth economics: large game downloads can generate a lot of egress, and R2's lack of egress fees makes the cost model much more attractive. developers.cloudflare.com

Bottom line:

• Want zero/minimal engineering: itch.io.
• Own website + want a professional custom store: Cloudflare R2 + private bucket + short-lived presigned URLs.
• Need sophisticated cloud infrastructure / already live in AWS: S3 + presigned URLs.
• Selling through Steam: use Steam's distribution and Steam keys rather than delivering Steam builds yourself. Steam specifically supports keys for distribution through other stores. partner.steamgames.com

If you tell me roughly how large your builds are (e.g. 2 GB vs 50 GB), expected monthly downloads, and whether customers buy through your own website or a storefront, I can recommend a concrete stack and estimate the monthly cost.

For a small indie studio selling large downloadable builds + license/activation keys, I’d generally avoid generic “file-sharing” products. The better architecture is private object storage + your own order/entitlement layer + short-lived signed download URLs.

My top pick: Cloudflare R2

cloudflare.com is probably the best fit if you're comfortable doing a little integration work.

• Private storage: keep every game build in a non-public bucket.
• Secure delivery: after a successful purchase, your server generates a temporary presigned URL for the customer's specific build. R2 supports expiring URLs from 1 second to 7 days. Cloudflare Docs Cloudflare Docs
• Large files: customers download directly from R2 rather than through your web server, which is important when builds are tens of GB.
• Simple infrastructure: R2 is S3-compatible, so you can use standard S3 SDKs/tools. Cloudflare Docs
• Good security model: the customer never gets your storage credentials. Treat the signed URL itself as a temporary bearer token. Cloudflare Docs

The basic flow I'd use is:

Purchase → create entitlement → generate license key → customer logs in/enters key → server verifies entitlement → generate short-lived signed URL → direct download

That gives you much more control than emailing a permanent download link.

Runner-up: Amazon S3

aws.amazon.com is the more established alternative and is excellent technically. S3 supports private objects and presigned URLs, including downloads of very large objects; AWS documents presigned URLs as a way to give time-limited access without changing bucket permissions. AWS Documentation AWS Documentation

I'd choose S3 if:

• you're already using AWS;
• you expect substantial scale;
• you want the enormous AWS ecosystem around it;
• your developer is comfortable with AWS.

For a small studio starting from scratch, though, R2 is usually the simpler recommendation I'd investigate first.

What I would not do

I wouldn't make your build files permanently public and rely on obscure URLs. Once a URL gets posted, anyone can potentially download the game.

I also wouldn't put your storage credentials into your website/game launcher. Keep them server-side and issue narrowly scoped, expiring download URLs instead. Both R2 and S3 explicitly describe presigned URLs as bearer credentials, so their lifetime and exposure matter. Cloudflare Docs AWS Documentation

One important distinction

File delivery and key management are separate problems.

For example:

• R2/S3 → stores and delivers your 20–100 GB game builds.
• Your database → records who bought which game/version.
• Payment processor → handles the transaction.
• Your key/entitlement system → determines whether someone is entitled to download/activate.
• Your website/launcher → authenticates the customer and requests the temporary download URL.

If you tell me what you're using for your storefront/payment (Stripe, Shopify, WooCommerce, custom site, itch.io, etc.), your typical build size, and whether you have a launcher, I can recommend a specific stack and architecture rather than just the storage layer.

I also wouldn't put your storage credentials into your website/game launcher. Keep them server-side and issue narrowly scoped, expiring download URLs instead. Both R2 and S3 explicitly describe presigned URLs as bearer credentials, so their lifetime and exposure matter.

One important distinction

File delivery and key management are separate problems.

For example:

For a small indie studio, the best setup is usually not a specialized "file delivery" service by itself. It's a combination of:

1. A storefront/payment platform
2. Secure digital delivery
3. License or key management
4. Cloud storage/CDN for large builds

That gives you a much more scalable workflow than emailing download links or hosting files yourself.

Here's how I'd rank the options.

My top recommendation: SendOwl

If you're selling downloadable builds from your own website, SendOwl is one of the strongest choices because it was built specifically for digital products and software. It supports:

• automatic download delivery
• unique Steam/Epic/license key distribution
• expiring download links
• download limits
• PDF and file protection
• large file hosting via CDN
• Stripe and PayPal integration
• customer download history for re-downloads

It's particularly well suited for indie games rather than ebooks or courses. www.sendowldev.comwww.shopify.com

If you're already using Shopify

Use Shopify with a dedicated digital delivery app instead of Shopify's basic download functionality.

Look for features like:

• unique key delivery
• license management
• download throttling
• fraud detection
• private storage (Amazon S3 compatible)
• download analytics

These apps provide much stronger protection than simply attaching files to orders. www.shopify.com

If your builds are huge (20–100+ GB)

I wouldn't store those directly on your web server.

Instead:

• Store builds in Amazon S3, Cloudflare R2, or Backblaze B2.
• Put a CDN in front of them.
• Generate signed URLs that expire after a short period (e.g. 24 hours).
• Let your storefront generate those links only after purchase.

This is faster, cheaper, and more secure than serving downloads from your own VPS.

For game keys

If you sell Steam, Epic, GOG, or your own launcher keys:

• upload a CSV of keys
• automatically assign one per purchase
• keep an audit trail
• revoke unused keys if necessary

This removes the need for manual fulfillment and reduces mistakes. www.vaultn.com

Security features worth paying for

Regardless of platform, I'd prioritize:

• Expiring signed download URLs
• Download limits per purchase
• HTTPS everywhere
• Files stored outside your public web root
• Private cloud storage
• Fraud detection
• License/key validation in-game
• Logging every download
• Automatic re-downloads for legitimate customers

No system can completely stop piracy once someone has the files, but these measures make casual sharing much harder while keeping the experience smooth for paying customers. www.sendowldev.comwww.shopify.com

A stack I'd build today for a small indie studio

If I were starting from scratch, my stack would be:

• Website: Your own marketing site
• Payments: Stripe
• Storefront & fulfillment: SendOwl
• Storage: Cloudflare R2 (or Amazon S3)
• CDN: Cloudflare
• License management: Built-in key delivery or your own activation server
• Analytics: Plausible or Google Analytics

This combination is relatively inexpensive, scales well from a few hundred to tens of thousands of customers, and gives you full control over your customer relationships.

A couple of questions would help narrow the recommendation further:

• Are you selling DRM-free downloadable installers, Steam/Epic keys, or both?
• Roughly how large are your Windows/macOS/Linux builds (e.g. 5 GB, 20 GB, 80 GB+)?

For a small indie studio, I’d shortlist Lemon Squeezy and itch.io, with the choice depending on whether you want your own storefront or a game marketplace.

My pick: Lemon Squeezy

Lemon Squeezy is probably the best fit if you’re selling directly from your own website.

• Secure download delivery: files are delivered through securely signed, throttled download links rather than exposing a permanent public file URL. www.lemonsqueezy.comwww.lemonsqueezy.com
• Large files: you can attach up to 5 GB total per product according to their current documentation. docs.lemonsqueezy.com
• License keys: it can automatically generate unique keys, with configurable activation limits and license duration. docs.lemonsqueezy.com
• Good automation: webhooks/API let you connect purchases to your own account system, launcher, or license server. docs.lemonsqueezy.com
• Security/operations: it also handles payment-card compliance and acts as merchant of record, which substantially reduces the amount of payment/tax infrastructure you have to operate yourself. www.lemonsqueezy.comwww.lemonsqueezy.com

The main caveat: if your builds regularly exceed 5 GB per product, I'd use dedicated object storage/CDN infrastructure instead of trying to make your commerce platform double as a large-file CDN.

Best alternative: itch.io

itch.io is excellent if you're happy to sell through a game-focused storefront rather than primarily through your own site.

Its download-key system is particularly appropriate for games: purchases get unique download pages, and you can generate/revoke individual or bulk keys. It can also distribute external keys such as Steam keys. itch.io

It also has an API that lets you programmatically verify download-key ownership, which is useful if you eventually build your own launcher or entitlement system. www.lemonsqueezy.comdocs.lemonsqueezy.comwww.lemonsqueezy.comitch.ioitch.io

What I'd use for an indie studio

One important security distinction

Don't rely on merely putting a ZIP behind an obscure URL. For paid builds, I'd want:

payment → entitlement → short-lived/signed download URL → CDN/object storage

and separately:

purchase → unique license/Steam key → redemption/activation tracking

That way, leaking a download URL doesn't give someone a permanent unrestricted endpoint, and leaked license keys can be revoked or limited.

If you tell me roughly how large your builds are (e.g. 2 GB, 20 GB, 100 GB), whether you're selling on your own website, and whether you need Steam keys, I can narrow this down to the best 2–3 setups and their approximate costs.

For a small indie studio selling large game builds + keys, I’d narrow it to three choices:

My pick: lemonsqueezy.com

If you want selling + payment + tax handling + license keys + secure downloads in one service, Lemon Squeezy is probably the best fit.

• Secure, signed download URLs that expire and are rate-limited. Lemon Squeezy Docs Lemon Squeezy
• Built-in software license-key management, including issuing, deactivating, and reissuing keys. Lemon Squeezy
• Customers can return later and retrieve their purchases through their order history. Lemon Squeezy Docs
• It acts as a merchant of record, which can substantially reduce the tax/payment-compliance burden for a small studio. Lemon Squeezy
• Important limitation: their current documentation says each product can contain up to 5 GB total of files. Lemon Squeezy Docs

So if your builds are, say, 500 MB–4 GB, I'd seriously consider it.

Best if your builds are huge: sendowl.com

SendOwl is particularly attractive if file delivery itself is your main concern.

It supports large software files, secure/expiring download links, download controls, and license-key delivery. Its current platform documentation advertises unlimited storage and no artificial file-size restrictions. SendOwl SendOwl

The tradeoff is that it's more of a digital-delivery platform than an all-in-one indie-game storefront/payment solution, so you may need to assemble more of the commerce stack yourself.

Best for an indie-game-native approach: itch.io

If you're happy selling through itch.io, it's remarkably well suited to games.

Its download keys are effectively access credentials to your game's files, and you can generate individual or bulk keys, track their use, and revoke them. itch.io It also has a server-side API if you want to integrate purchases/keys with your own systems. itch.io

The downside is less control over your own checkout/customer experience compared with running your own store.

What I'd choose

One thing I wouldn't do is simply put a ZIP on Google Drive, Dropbox, your web server, etc. and email customers a permanent URL. For paid game builds, you want entitlement checking + expiring/signed URLs + rate limiting + revocation after refunds + resumable large-file downloads.

If you tell me roughly how big your builds are (e.g. 2 GB, 15 GB, 50 GB), whether you're selling Steam keys, and whether you already have a website/store, I can recommend a specific architecture and estimate the delivery cost per 1,000 downloads.

For a small indie studio selling large downloadable builds + Steam/other platform keys, I’d narrow it to two strong choices:

My pick: Lemon Squeezy

lemonsqueezy.com is probably the best fit if you want your own storefront/checkout without building the delivery infrastructure yourself.

Why:

• Secure download delivery: download links are signed and throttled, which helps prevent casual link sharing and abusive traffic. LemonSqueezy LemonSqueezy
• License keys: it automatically generates unique keys per purchase, with configurable activation limits and license duration. Lemon Squeezy Docs
• Large files: it supports up to 5 GB total files per product, with arbitrary file types such as ZIPs and software. Lemon Squeezy Docs
• Updates: you can replace the files and existing purchasers get the updated files rather than requiring you to manually email everyone. Lemon Squeezy Docs
• Payments/tax: it's a merchant of record, so it handles payment processing and sales-tax/VAT responsibilities. LemonSqueezy

The big caveat is the 5 GB-per-product limit. If your builds are 10–50+ GB, I'd use a different architecture.

Best if you're specifically an indie game studio: itch.io

itch.io is remarkably good for this use case and may actually be the easiest answer if you don't need a highly customized store.

It hosts the game files, handles purchase access, and gives each purchaser a unique download key. It also supports generating/revoking individual and bulk download keys and distributing external keys such as Steam keys. itch.io itch.io

The particularly nice part for an indie studio is that the download entitlement and the Steam key can live together: a customer can purchase your game, download the build from itch.io, and retrieve their Steam key from the same purchase page. itch.io

itch.io also lets you sell directly with Stripe/PayPal rather than requiring another storefront. itch.io

What I'd choose

For very large builds, I'd actually avoid putting the files directly into an ecommerce platform. A robust setup is:

Checkout → payment webhook → entitlement record → short-lived signed download URL → object storage/CDN

For example, you could put encrypted/private builds in Cloudflare R2 or Amazon S3 and only issue a temporary signed URL after verifying the customer's purchase. That gives you much more control over bandwidth, revocation, abuse prevention, regional delivery, and files tens or hundreds of GB in size.

One other important consideration: don't treat a Steam key as your primary security mechanism. Recent indie releases have had substantial problems with stolen/abused Steam keys and gray-market resale. GamesRadar+ Keep your downloadable build entitlement and platform key inventory separately controllable, and only expose a Steam key after a legitimate purchase is confirmed.

If you tell me roughly how large your builds are (e.g. 2 GB, 15 GB, 80 GB) and whether you're selling through your own website or itch.io, I can recommend a specific architecture and the cheapest option for your scale.

For a small indie studio, I’d strongly recommend object storage + short-lived signed download URLs, rather than a generic file-sharing service.

My top pick: Cloudflare R2

Cloudflare R2 is probably the best fit if you're comfortable having a small amount of backend code.

Why:

• Private by default: keep your builds inaccessible to the public.
• Signed download links: after a customer buys a game, your server generates a temporary URL for that specific build. R2 supports presigned URLs with expirations from 1 second up to 7 days. developers.cloudflare.com
• Large files: R2 supports objects up to 5 TiB and multipart transfers for large files, including resumable uploads. developers.cloudflare.com
• S3-compatible: you can use standard S3 SDKs rather than learning a proprietary storage API. developers.cloudflare.com
• Good security model: your actual storage credentials never go to the customer; your backend hands them a temporary bearer URL. developers.cloudflare.com

A typical setup would be:

Customer purchases game
        ↓
Your store/payment system
        ↓
Your backend verifies purchase
        ↓
Generate short-lived signed URL
        ↓
Customer downloads directly from R2

I'd make the URL expire in something like 15–60 minutes, while allowing the customer to request a fresh link from their purchase page. This limits the damage if someone posts a download URL publicly.

Runner-up: Amazon S3

Amazon S3 is the more established alternative and is excellent technically. S3 has the same fundamental signed-URL model, supports very large objects, and has mature tooling. docs.aws.amazon.com

I'd choose S3 if your studio already uses AWS. Otherwise, R2 is likely simpler for an indie operation, particularly if you're distributing many large builds.

What I would not use as the core delivery mechanism

I wouldn't make Dropbox, Google Drive, OneDrive, WeTransfer, etc. the foundation of your storefront. They're designed primarily for people sharing files, rather than purchase → entitlement → authenticated download → revocation/version management.

Likewise, simply putting your .zip behind an obscure URL isn't sufficient. A leaked URL can become a permanent public download.

One important distinction: keys vs. builds

If you're selling Steam/Epic/etc. keys, the key itself should be treated separately from the game files:

• Store the key encrypted.
• Associate it with an order/customer entitlement.
• Reveal it only after successful payment.
• Don't put the key in the downloadable ZIP.
• Keep an audit trail of when it was revealed/redeemed.

For the actual game builds, use private object storage + signed URLs.

If I were building this for a 2–10 person indie studio today, my default stack would be: your existing storefront/payment processor + a tiny backend + Cloudflare R2 + signed URLs. It gives you a professional delivery system without having to build your own file-transfer infrastructure. developers.cloudflare.com

If you tell me what you're using for the storefront/payment side (Stripe, Shopify, WooCommerce, custom site, itch.io, etc.) and roughly how large your builds are, I can recommend the specific architecture and software stack.

For a small indie studio selling large downloadable builds + activation keys, I’d avoid generic file-sharing services (Dropbox/Google Drive/WeTransfer) and use a proper object-storage + signed-download setup.

My top pick: Cloudflare R2 + your own checkout/account system

Cloudflare R2 is particularly well suited if you’re comfortable having a developer integrate it.

Why:

• Large files: R2 supports objects up to 5 TiB using multipart uploads, with resumability for large files. developers.cloudflare.com
• Secure delivery: your server can generate a short-lived, signed download URL after verifying that the customer purchased the game. The customer never gets your storage credentials. developers.cloudflare.com
• S3-compatible: you can use standard S3 SDKs/tools, so you're not locked into a proprietary API. developers.cloudflare.com
• Good architecture for games: store GameName-Windows.zip, GameName-macOS.zip, patches, DLC, etc. in private buckets and issue downloads only after authentication/payment.
• You can put a download portal on your own domain, e.g. downloads.yourstudio.com, rather than sending customers to a third-party file host.

The important distinction is that R2 is storage/delivery infrastructure, not the entire commerce system. You'd still need your storefront/payment processor and a small backend that connects "purchase → entitlement → signed download."

If you want almost zero engineering: itch.io

itch.io is probably the easiest answer for an indie studio that doesn't want to build this infrastructure.

Its purchase system creates a unique download page for each transaction, and customers can return to it to download updated files. It also supports distributing external keys such as Steam keys. itch.io

So you get:

Payment → entitlement → download page → game files + key

without having to build that machinery yourself.

The tradeoff is that your customer experience and distribution are tied to itch.io rather than completely controlled by your studio.

What I'd choose

Security architecture I'd recommend

Don't make your game ZIPs publicly accessible.

Instead:

Customer pays
→ Order marked paid
→ Customer authenticates
→ Backend verifies entitlement
→ Backend generates signed URL valid for, say, 1 hour
→ Customer downloads directly from R2

R2 specifically supports presigned URLs for this use case; they're temporary and scoped to an individual object. developers.cloudflare.com

One nuance: a signed URL is a bearer token. Anyone who obtains it can use it until it expires, so you shouldn't put permanent download URLs in emails or expose your storage bucket publicly. developers.cloudflare.com

If you tell me (1) what you're using for checkout/storefront (Stripe, Shopify, WooCommerce, custom, etc.), (2) typical build size, and (3) whether you're selling Steam keys as well as DRM-free builds, I can recommend a concrete stack and architecture for your studio.

For a small indie studio, I’d narrow it down to three good approaches, depending on whether you want a storefront or just secure file delivery.

My top pick: itch.io

If you’re comfortable selling through a game-focused storefront, itch.io is probably the easiest fit.

• Customers get a unique download key/URL after purchasing.
• You upload the Windows/macOS/Linux builds directly.
• Buyers retain access to future builds you upload.
• You can issue individual or bulk download keys for press, backers, reviewers, etc.
• It also supports distributing Steam keys alongside your downloadable build.
• You don't need to build your own download authentication system. itch.io
• itch.io explicitly recommends uploading files directly rather than relying on third-party file hosts. itch.io

For an indie game, that's a pretty compelling combination.

itch.io creator documentation

Best if you want your own store: Lemon Squeezy

Lemon Squeezy is attractive if you want customers buying through your website rather than an itch.io page.

It combines:

• Checkout/payment processing
• Digital-file delivery
• License-key generation
• Activation limits
• License API/webhooks
• Product variants

Its current limit is 5 GB total files per product, so it's great for moderately sized builds but potentially restrictive for modern 20–50+ GB games. docs.lemonsqueezy.com

Lemon Squeezy

Best for very large builds / maximum control: Cloudflare R2

If your builds are 10s or 100s of GB, I'd consider separating commerce from file delivery.

A particularly good architecture is:

Your store → your backend → Cloudflare R2 → temporary signed download URL

R2 supports S3-compatible storage and presigned URLs, so your actual bucket can remain private. Your server verifies that the customer owns the game and then generates a short-lived URL that allows the customer to download that particular file. developers.cloudflare.com

For large files, R2 also supports multipart uploads up to 5 TiB, with resumable/parallel uploads. developers.cloudflare.com

Cloudflare R2 documentation

AWS S3 is the equivalent alternative. Its presigned URLs provide time-limited access to private objects and can be used directly by a browser or download client. docs.aws.amazon.com

Amazon S3

What I'd choose

One important distinction: a signed download URL protects access to the file; it doesn't prevent a legitimate customer from copying the downloaded game. If you're trying to prevent key sharing/re-selling, that's a separate licensing problem.

For a small studio, I'd generally avoid building an S3/R2 delivery system from scratch unless your builds are too large for a storefront's limits. The engineering cost of handling refunds, expired links, customer re-downloads, abuse, support cases, bandwidth, etc. can outweigh the storage savings.

If you tell me roughly how large your builds are (e.g. 2 GB, 20 GB, 80 GB) and whether you're already selling through your own website, Steam, or another storefront, I can recommend a specific setup and estimated monthly cost.

For a small indie studio, I’d separate “selling the game” from “serving the game files.” The best choice depends on whether you want an all-in-one service or are comfortable running a small backend.

My top pick: Lemon Squeezy

Lemon Squeezy is probably the best low-maintenance option if you're selling directly from your own site.

It handles:

• Digital-file hosting and secure delivery — you upload your ZIP/build and it delivers it after purchase. www.lemonsqueezy.com
• License/key generation with configurable activation limits. docs.lemonsqueezy.com
• Signed/throttled download links, reducing straightforward link sharing and abuse. www.lemonsqueezy.com
• Checkout, payments, fraud handling and tax/Merchant-of-Record functionality. www.lemonsqueezy.com
• Multiple builds/variants, which is useful for Windows/macOS/Linux editions. docs.lemonsqueezy.com

The big advantage for an indie studio: you don't have to build your own entitlement system, payment integration, download authorization, and license-key infrastructure.

Best if you want maximum control: Cloudflare R2 + your own entitlement service

If you're technical and expect large builds and lots of downloads, I'd seriously consider:

Your store → your backend → Cloudflare R2 → temporary signed download URL

Cloudflare R2 is S3-compatible object storage and currently has no egress charges, which is particularly attractive for games where a 20–50 GB download might be downloaded thousands of times. Standard storage is currently $0.015/GB-month, with a 10 GB monthly free tier. developers.cloudflare.com

R2 supports presigned URLs that grant temporary access to a specific object; they can expire anywhere from seconds to seven days. developers.cloudflare.com

A good architecture would be:

Customer
   │
   ▼
Your website / checkout
   │
   ▼
Payment confirmed
   │
   ▼
Your entitlement database
   │
   ├── customer owns Game A?
   ├── license/key valid?
   └── download entitlement valid?
            │
            ▼
      Generate short-lived
      R2 signed URL
            │
            ▼
       Game ZIP / build

Your R2 bucket stays private. Customers never get a permanent public URL.

I'd make the download URL relatively short-lived—say 15–60 minutes—and generate a fresh one whenever the customer clicks Download. The signed URL itself is a bearer token, so keeping its lifetime short is an important security measure. developers.cloudflare.com

What I'd choose for your studio

One important distinction: secure delivery doesn't mean DRM. A signed download URL can prevent someone from simply posting a permanent /game.zip URL, but once a legitimate customer downloads the game, you can't technically prevent them from copying the ZIP. For indie games, I'd generally combine secure delivery with per-customer license keys/entitlements, rather than trying to build aggressive DRM.

If you're already selling through your own website, my recommendation would change to R2 + a tiny entitlement/download service. It's a very good fit for a small studio because the storage/download infrastructure is inexpensive, while you retain control over your customer accounts, keys, builds, and storefront.

For a small indie studio selling downloadable builds and keys, the “best” choice is usually not a pure file-sharing service. You want a delivery system that handles:

• Large files (multi-GB builds)
• Resume-able downloads (players on bad connections)
• Expiring/authenticated links
• Key/license delivery
• Fraud prevention
• CDN-backed bandwidth
• Customer support tools (re-downloads, failed downloads, order lookup)

A few good fits:

My recommendation by studio size

1–10 person indie team, direct sales:

• Use a digital commerce layer like SendOwl (or your storefront platform’s digital delivery tools).
• Store builds privately.
• Deliver via protected links.
• Generate keys automatically.
• Keep a separate patch/update strategy.

If your game is 10–50 GB and you expect launch spikes:

• Use object storage + CDN:
  • Storage: S3/R2/etc.
  • Delivery: CDN
  • Access: signed URLs tied to purchases
  • Database: order → customer → download entitlement

If you sell Steam/Epic keys plus DRM-free builds:
A common setup is:

• Storefront handles checkout
• Key generator handles platform keys
• Download service handles DRM-free files
• Customer account system tracks entitlements

Avoid using:

• Google Drive/Dropbox links for paid games
• Public S3 buckets
• Permanent download URLs
• Emailing ZIP files manually
• A single VPS serving all downloads

Those tend to fail at launch time or make piracy/leaks harder to control.

For most indie studios, I’d start with SendOwl or a similar digital delivery service, then move to S3/R2 + CDN + signed URLs once download volume justifies custom infrastructure. www.akamai.comwww.sendowl.com

If you tell me your typical build size (e.g., 2 GB vs 40 GB), monthly sales volume, and whether you sell through your own website or a marketplace, I can narrow this down.

For a small indie studio selling large downloadable game builds plus keys, I’d lean toward an e-commerce platform that handles both secure file delivery and licensing, rather than trying to build download security yourself.

Best overall: Lemon Squeezy

It’s particularly well matched to your use case:

• Secure download delivery: files are hosted for you, with securely signed and throttled download links. www.lemonsqueezy.com
• License keys: it can automatically generate unique keys per purchase, with configurable activation limits and license duration. docs.lemonsqueezy.com
• Large binary files: supports arbitrary digital files including ZIPs and software. www.lemonsqueezy.com
• Customer access: customers can access their licenses and purchased files through its customer/order experience. docs.lemonsqueezy.com
• Less infrastructure for you: it also handles checkout, payments, fraud prevention, and tax as a merchant of record. www.lemonsqueezy.com

For a small team, that's a substantial advantage: you don't have to build S3-style signed URLs, purchase verification, key issuance, download throttling, refund handling, etc.

Best if you're already centered on indie-game distribution: itch.io

itch.io is arguably the simplest solution if you're happy for the store/download experience to live there. It hosts your game files and provides purchasers with unique download keys/URLs. itch.ioitch.io

It also supports distributing external keys such as Steam keys to purchasers. itch.ioitch.io

The tradeoff is that it's more of a game storefront/distribution platform than a backend you control for your own store.

Worth considering: Gumroad

Gumroad supports software license keys and has an API for verifying them, including activation/use limits that you can enforce in your game. gumroad.com

I'd put it behind Lemon Squeezy for a game studio, though, because Lemon Squeezy's combination of file delivery + software licensing + signed downloads is closer to your exact requirements.

What I'd choose

One important distinction: download security and DRM are different things. A signed download URL can prevent someone from simply posting your private ZIP URL publicly, but once a customer downloads an unencrypted game build, you can't make the binary itself impossible to copy. Your license system is what should control whether the game is authorized to run.

For your situation, I'd probably build the architecture as:

Website → Lemon Squeezy checkout → signed build download + unique license key → game activates key against your licensing API

That gives you considerably more control than just emailing customers a permanent Google Drive/S3 link.

If your builds are 10–100+ GB, that's where I'd evaluate the options differently, because bandwidth/storage economics and resumable downloads become important.

For a small indie studio selling downloadable builds + activation keys, I’d prioritize a service that handles secure file delivery, expiring/controlled downloads, payments, refunds, and key fulfillment rather than trying to build the delivery layer yourself.

My shortlist

itch.io is particularly compelling for your use case: purchases automatically produce a unique download URL, customers can re-download updated builds, and you can distribute external keys such as Steam keys alongside the downloadable game. itch.io

itch.io developer documentation

Lemon Squeezy is the one I'd investigate if you want customers buying from your own branded storefront rather than primarily through a game marketplace. It hosts and securely delivers files after purchase and supports arbitrary file types, but its current limit is 5 GB total files per product, which can become restrictive for modern 3D games. docs.lemonsqueezy.com

Lemon Squeezy

Gumroad allows a substantially larger 20 GB individual file for paid products, so it's viable for big builds. But I'd regard it more as a general digital-product platform than a purpose-built game distribution system. gumroad.com

Gumroad

What I'd choose

If you're small and don't want to maintain infrastructure:

itch.io → downloadable build + Steam keys

If you're selling primarily from your own website:

Lemon Squeezy → checkout/license management + hosted downloads

If your builds are 10–50+ GB, I'd skip the ecommerce platforms' file hosting and use a dedicated object-storage/CDN setup (e.g. S3-compatible storage + CDN) with signed, time-limited download URLs. That gives you much better control over bandwidth, resumable downloads, versioning, and access revocation.

One important distinction: "secure delivery" doesn't mean preventing customers from copying the game once they've downloaded it. The realistic goal is preventing unauthorized access to the download, protecting paid keys, limiting abuse/bandwidth theft, and making legitimate re-downloads painless.

If you tell me roughly how large your builds are (e.g. 2 GB, 15 GB, 50 GB) and whether you already have Stripe/Shopify/a website, I can narrow this down to the best 2–3 architectures for your studio.

For a small indie studio selling downloadable game builds + license/Steam keys, my top pick would be Lemon Squeezy if you want the least infrastructure to maintain.

My ranking

Why I'd choose Lemon Squeezy: it combines checkout, file hosting, secure delivery, and licensing. Its download URLs are signed, expire after an hour, and are rate-limited; it also supports automatically generated license keys with configurable activation limits. docs.lemonsqueezy.com

That means your architecture can be roughly:

Customer → Lemon Squeezy checkout → payment → signed download → game ZIP + license key

rather than building your own authenticated download system.

Lemon Squeezy digital products

When I'd pick itch.io instead

If your studio is primarily selling games rather than software, I'd seriously consider itch.io. Its download keys are unique URLs granting access to your uploaded game files, and it has APIs for validating those keys. itch.io

It's particularly attractive if you want your customers to have an itch.io game-library experience rather than building that yourself.

What about Gumroad?

Gumroad is viable, particularly for smaller builds. Paid products can have individual files up to 20 GB, and Gumroad supports license-key generation and verification for software. docs.lemonsqueezy.comitch.iogumroad.com

I'd put it behind Lemon Squeezy for your use case because secure delivery + software licensing are more central to what you're describing.

If you want maximum control

For a studio with its own website/store, I'd consider:

Cloudflare R2 or Amazon S3 + CDN + your own checkout/licensing backend

Store the builds privately, then issue short-lived signed URLs after verifying the purchase. This can be extremely robust and inexpensive at scale, but you're responsible for authentication, key management, refunds/revocations, abuse prevention, download entitlements, etc.

Bottom line:

• Small studio, want to ship now: Lemon Squeezy
• Game-first / indie community: itch.io
• Simple digital-product storefront: Gumroad
• Already have a custom store / engineering resources: R2/S3 + signed URLs

If you tell me roughly how large your builds are (e.g. 2 GB, 20 GB, 100 GB), expected monthly downloads, and whether the "keys" are Steam keys or your own license keys, I can recommend the cheapest/most secure architecture for your specific scale.

For a small indie studio, I’d separate selling/entitlement from file delivery. You want customers to get a reliable download, while making the underlying build files private and difficult to casually share.

My default recommendation: Cloudflare R2 + signed download URLs

Cloudflare R2 is probably the best fit if you have your own storefront or website.

• Store builds as private objects in R2.
• After a successful purchase/key redemption, your backend generates a short-lived presigned URL for that customer's build.
• The URL can be restricted to a particular file and expires automatically; R2 supports presigned URLs from 1 second up to 7 days. developers.cloudflare.com
• R2 currently has no Internet egress charges, which is particularly attractive for games where a 20–100+ GB build might be downloaded many times. Standard storage is $0.015/GB-month, with 10 GB-month free. developers.cloudflare.com
• It's S3-compatible, so you're not locked into a proprietary file-delivery API. developers.cloudflare.com

Cloudflare R2 documentation

Architecture I'd use:

Storefront → payment/key redemption → your backend → entitlement check → short-lived R2 URL → game download

That gives you considerably more control than emailing customers a permanent download link.

If you don't want to build much infrastructure

itch.io is the easiest option if you're comfortable selling through a platform rather than your own checkout. Its download-key system associates purchasers with access to the files, and buyers can continue accessing files you've uploaded to the project. itch.io

Itch also recommends uploading the game files directly rather than using third-party download services. itch.io

itch.io creator documentation

Amazon S3 is the other strong choice

Amazon Web Services S3 is extremely mature and supports the same basic pattern: private objects + presigned URLs. AWS explicitly supports downloads of objects up to 5 TB and presigned URLs for temporary access. docs.aws.amazon.com

I'd choose S3 over R2 if you're already heavily invested in AWS. For a small studio starting from scratch, R2's lack of egress fees makes it particularly compelling for game distribution.

What I would not do

Avoid putting your actual build behind:

• permanent public URLs
• Google Drive/Dropbox-style shared links
• a public S3/R2 bucket
• links containing the customer's permanent entitlement token
• your web server's filesystem

Also, don't mistake a signed URL for DRM. A customer can still copy the downloaded game. The security benefit is that the download endpoint itself isn't permanently reusable.

If you're selling Steam keys + direct downloadable builds + console/DRM-free builds, the ideal architecture gets a little more interesting because you can have one entitlement system issue the appropriate file/key for each purchase. I can lay out a concrete $0–$50/month stack for a small indie studio, including storefront, payments, key management, R2, authentication, and the download flow.

For a small indie studio selling game builds + license/Steam keys, I’d separate “secure file delivery” from “DRM.” You can make downloads difficult to abuse, but no delivery service can prevent a customer from copying a game after they legitimately download it.

My top pick: SendOwl

SendOwl is probably the best fit if you want to sell directly from your own website without building the delivery infrastructure yourself.

Why I’d choose it:

• Large-file delivery for software/game builds. www.sendowl.comwww.sendowl.com
• Time-limited download links and configurable download limits, which substantially reduces casual link sharing. www.sendowl.com
• License-key generation/delivery, useful if you're selling your own keys in addition to builds. www.sendowl.comwww.sendowl.com
• Can host the files itself or use Amazon S3, giving you an option to control your storage architecture. www.sendowl.comwww.sendowl.comhelp.sendowl.comdocs.lemonsqueezy.comdocs.lemonsqueezy.comitch.io
• Automatic fulfillment means your flow can simply be payment → key + secure download → customer gets the build. help.sendowl.com
• It supports software/games specifically, rather than being merely a generic file-sharing service. apps.shopify.com

One caveat: SendOwl normally limits the number of downloads rather than offering unlimited access; its default is three, configurable to 5 or 10. help.sendowl.com For games, I'd generally prefer something like 10 downloads + a reasonably long expiration rather than making customers fight a one-download link.

If you want a more turnkey storefront: Lemon Squeezy

Lemon Squeezy is attractive if you also want the checkout, payments, taxes, and digital delivery handled together.

Its download URLs are signed, expire after one hour, and are rate-limited to 10 downloads/day/IP. docs.lemonsqueezy.com It supports arbitrary file types and currently allows up to 5 GB total files per product. docs.lemonsqueezy.com

I'd pick this over SendOwl if tax/payment administration is as important to you as file delivery.

If your games are primarily PC builds: itch.io

itch.io is worth considering if you don't necessarily need your own checkout.

It has a particularly nice game-oriented model: purchasers receive download keys/URLs granting access to the game's files, and it has an API for verifying purchases and download keys. itch.io

It's much more game-native than generic digital-download services, but you're giving up some control over the direct-sales experience.

What I'd build for an indie studio

If you're selling from your own website, I'd use:

Your website → payment processor/store → SendOwl → secure build download

and separately:

Purchase → unique license/Steam key → customer

For the actual build, I'd use ZIP/installer archives rather than exposing a permanent S3/public URL. The important security properties are:

1. No permanent public download URL.
2. Signed/time-limited download URLs.
3. Per-customer download limits.
4. Ability to revoke/reset a customer's download access.
5. Keys associated with the order/customer.
6. Refund automatically invalidates the key/access where possible.
7. Keep the actual storage bucket private.
8. Put your game version/build number in the order metadata so support can tell exactly what the customer received.

Bottom line: For your specific description, SendOwl is my first choice, Lemon Squeezy if you want a more all-in-one commerce/tax solution, and itch.io if you want a game-centric distribution platform rather than primarily running your own storefront.

For a small indie studio, I’d separate “where the files live” from “how customers prove they bought them.” You generally don’t want to email builds or put paid builds behind a permanent public URL.

My top pick: Cloudflare R2 + your store/payment system

Cloudflare R2 is probably the best fit if you have—or are willing to build—a small customer download service.

• Cheap for large downloads: R2 is specifically designed for large amounts of internet-served data and has no egress bandwidth fees, which is particularly attractive for games where customers may repeatedly download multi-GB builds. developers.cloudflare.com
• Keep everything private: Don't make the bucket public. After verifying a customer's purchase, your server generates a short-lived presigned download URL. R2 supports expiring URLs from 1 second to 7 days. developers.cloudflare.com
• Good security model: Your R2 credentials never go to customers; the temporary URL only grants access to the specific file. Cloudflare explicitly recommends presigned URLs for anonymous/customer access. developers.cloudflare.com
• Encryption: R2 encrypts objects at rest with AES-256 and uses TLS for transfers. developers.cloudflare.comdevelopers.cloudflare.comdevelopers.cloudflare.com

A typical setup would be:

Purchase → payment/store webhook → create entitlement → customer opens download page → authenticate purchase → generate 1-hour signed URL → R2 delivers the build

That gives you considerably more control than sending a static download link around.

If you don't want to build infrastructure: itch.io

itch.io is probably the easiest answer for a tiny studio.

Its download keys/URLs are already designed around paid game ownership, and itch.io handles access to your uploaded files. It also exposes APIs for checking whether a download key is valid. itch.io

I'd choose itch.io if your priority is:

“We want customers to buy the game and download it securely without us building a distribution backend.”

I'd choose R2 if your priority is:

“We sell through our own website and want complete control over distribution.”

AWS S3 is the other strong option

Amazon S3 provides essentially the same fundamental architecture: private objects + temporary presigned URLs. AWS allows presigned downloads to be valid for a limited period, and the URL can be used directly in a browser. docs.aws.amazon.com

It's extremely mature, but for an indie studio I generally prefer R2 for download-heavy games because bandwidth/egress economics are simpler.

What I'd avoid

Dropbox/Google Drive/OneDrive: fine for sending a build to a reviewer, not ideal as your customer distribution system.

Permanent public CDN URLs: convenient, but anyone who obtains the URL can potentially redistribute it.

Password-protected ZIPs: adds friction without solving entitlement/revocation very well.

Building your own file server: unnecessary operational/security burden when object storage already solves the hard parts.

One important distinction

If by “keys” you mean Steam/GOG/etc. activation keys, that's a different problem from delivering your actual game files. You'd want a system that tracks:

• customer/order ID
• entitlement to each product/version
• activation key
• key redemption status
• download authorization
• revoked/refunded orders
• build/version
• download/audit events

For a small studio, my practical ranking would be:

If you tell me what you're using for the storefront/payment side (Shopify, Stripe, WooCommerce, custom site, itch.io, etc.) and roughly how large the builds are (e.g. 2 GB vs 50 GB), I can recommend a specific architecture and the cheapest/safest option for your situation.