ChatGPT answers, unedited

If your key requirement is subscriptions + one-time purchases in the same cart/checkout, I’d narrow the field considerably.

Best options

My recommendation by use case

If you're on Shopify: I'd start with shopify.com + Appstle. Shopify's native infrastructure supports both one-time and subscription purchase options, and customers can manage both types of purchases through their account. Shopify Help Center Shopify App Store

If you're building a custom site/app: stripe.com + Stripe Checkout is the architecture I'd investigate first. It gives you much more control over how the cart, payment, subscription lifecycle, and customer experience work, but requires more engineering than Shopify.

If subscriptions are the core of the business: Recharge or Loop are worth evaluating alongside Shopify. The important distinction is that you're buying into a more sophisticated subscription-management layer rather than just adding recurring pricing to products.

One important caveat: "supports one-time purchases" isn't necessarily the same as "allows arbitrary one-time + recurring line items in one checkout." That's the capability I'd test in a demo. For example, your target flow should be:

Product A — $49 one-time
Product B — $19/month subscription
Product C — $12 one-time
Checkout → one payment → subscription created + one-time items fulfilled

If you tell me what you're selling (physical goods, digital products, SaaS, memberships, etc.) and whether you're already on Shopify, I can give you a much tighter 3-option comparison, including fees, checkout behavior, taxes, failed-payment handling, and customer portal capabilities.

If your core requirement is “a customer can put both a recurring item and a one-time item into the same cart and pay once”, there are two strong architectures:

Best options

My take

For a custom product: I'd choose Stripe Billing + Stripe Checkout.

Stripe explicitly supports a mixed cart: a Checkout Session can contain recurring subscription prices and one-time prices. The one-time items are charged on the initial invoice, while the recurring items continue as the subscription. Stripe Docs Stripe Docs

For example:

Monthly membership — $20/mo

• Setup kit — $49 one-time
• Premium add-on — $15/mo

Pay today: $84
Then: $35/mo

That's a genuinely unified checkout rather than sending the customer through separate payment flows.

For a conventional ecommerce store: I'd look at Shopify + Appstle first. Shopify's current App Store has a large set of subscription apps specifically supporting one-time payments; Appstle is among the prominent options and currently lists both subscriptions and bundles. Shopify App Store Shopify App Store

Important distinction

If by “unified cart” you mean the actual cart UI, not merely “one checkout,” I'd prioritize:

1. Shopify + subscription app — easiest if you're selling physical goods.
2. Stripe + your own cart — most flexible and cleanest architecture for a custom application.
3. Recharge/other subscription platforms — worth considering when subscription operations, retention, and lifecycle management are more important than having a simple stack.

If you tell me what you're selling (physical products, SaaS, memberships, digital products, etc.) and whether you already use Shopify/Stripe, I can narrow this to 2–3 architectures and compare fees, mixed-cart behavior, subscription management, taxes, discounts, and implementation effort.

My take

For a custom product: I'd choose Stripe Billing + Stripe Checkout.

Stripe explicitly supports a mixed cart: a Checkout Session can contain recurring subscription prices and one-time prices. The one-time items are charged on the initial invoice, while the recurring items continue as the subscription. docs.stripe.com docs.stripe.com

For example:

Monthly membership — $20/mo

• Setup kit — $49 one-time
• Premium add-on — $15/mo

Pay today: $84
Then: $35/mo

That's a genuinely unified checkout rather than sending the customer through separate payment flows.

If your core requirement is one cart that can contain both subscription items and one-time purchases, I’d narrow the field considerably.

Shortlist

My main recommendation: Shopify

Shopify is particularly well suited to this requirement because subscriptions are built into the platform's selling-plan model rather than being a completely separate checkout system.

A customer can put, for example:

• 1 × monthly coffee subscription
• 2 × one-time mugs
• 1 × one-time gift box

into the same cart and checkout. Shopify explicitly supports customers buying one-time purchases and subscriptions together. Shopify Shopify Help Center

It also handles subscription and one-time line items separately behind the scenes, while presenting them through the same checkout experience. Shopify Help Center

For a straightforward implementation, Shopify Subscriptions is the first thing I'd investigate. It's Shopify's own subscription app and supports weekly, monthly, and yearly recurring billing, subscription discounts, and customer self-service for pausing/skipping/canceling. Shopify Help Center

help.shopify.com

If the cart UX is the differentiator

I'd specifically look at Shopify's selling-plan/cart architecture rather than choosing a subscription service solely on its subscription-management features.

Shopify's Storefront API lets a custom storefront retrieve selling plans and create a cart containing subscription line items, which makes it viable for a highly customized/headless shopping experience too. Shopify

One important caveat: mixed fulfillment/shipping rules can get complicated. Shopify can calculate subscription and one-time shipping separately, but there are limitations around mixing delivery methods in a single subscription checkout. Shopify

When I'd choose something else

BigCommerce is worth considering if your catalog, pricing, B2B, or multi-store requirements are more complex. Its subscription capability is designed around integrations with recurring-billing providers rather than the same native selling-plan model Shopify uses. BigCommerce

WooCommerce makes sense if you're already heavily invested in WordPress and want maximum control over the checkout. The tradeoff is that you're assembling more of the system yourself.

Dedicated Shopify subscription apps such as Recharge, Skio, Loop, Appstle, etc. become interesting when subscription operations—dunning, retention, customer portals, analytics, migration, bundles, complex subscription rules—matter more than having the simplest stack. A current 2026 comparison covers these options. OneCart

Bottom line: if you mean “I want a normal ecommerce cart where customers can freely mix recurring and one-time products, without being sent through a separate subscription checkout”, Shopify is the platform I'd investigate first. Its native selling-plan architecture directly supports that model. Shopify

If you tell me whether you're selling physical products, digital products, or both, and whether this is new build vs. an existing store, I can narrow this to 2–3 specific stacks and compare their cart UX, fees, subscription management, and implementation effort.

If your key requirement is subscriptions + one-time purchases in the same cart/checkout, I’d shortlist these:

1. 🥇 Skio — best overall

skio.com

I'd pick Skio if the subscription experience is strategically important. It supports adding both one-time and subscription products to the cart, and its subscription system has sophisticated customer-portal functionality. Skio Skio

A particularly nice feature is one-time upsells: subscribers can add a product to their next recurring order without creating another subscription. Skio

Caveat: Shopify still treats subscription and one-time shipping separately in mixed carts, so "unified cart" doesn't necessarily mean a single shipping calculation. Skio

2. Shopify Subscriptions — best for simplicity

help.shopify.com

If you're already on Shopify and don't need advanced subscription merchandising, this is probably the lowest-complexity choice. Shopify explicitly supports products being sold both as subscriptions and one-time purchases, and subscription information appears in the cart and checkout. Shopify Help Center Shopify Help Center

I'd choose this when you want native Shopify infrastructure rather than a sophisticated subscription platform.

3. Appstle — best value

apps.shopify.com

Appstle is worth considering if you want more subscription functionality than Shopify's basic offering without jumping immediately to a premium platform. Shopify currently lists it as Built for Shopify, with one-time payment support and thousands of reviews. Shopify App Store

4. Recharge — best for mature subscription operations

rechargepayments.com

I'd look at Recharge when you're running a substantial subscription business and need a more specialized subscription stack rather than simply adding recurring billing to a Shopify store.

My recommendation

If your requirement is specifically:

"A customer can put Product A one-time + Product B subscription + Product C one-time in one cart and check out together."

I'd rank them:

Skio > Shopify Subscriptions > Appstle > Recharge

But if you tell me what you're selling (physical goods, digital products, SaaS, memberships, etc.), your ecommerce platform (Shopify/WooCommerce/custom), and approximate monthly orders, I can narrow this to the best 1–2 options and compare fees, checkout behavior, mixed-cart handling, subscriptions, and customer portal.

If your key requirement is one cart containing both subscription items and one-time purchases, I’d narrow the field quite a bit.

My picks

My default recommendation: Shopify + Appstle. Shopify's ecosystem explicitly supports subscription apps that also handle one-time purchases, and Appstle currently has a 5.0 rating with 8,600+ reviews in the Shopify App Store. Shopify App Store

If you want the least complexity, Shopify's native subscription product is compelling: customers can have both one-time and subscription purchases in their account, while subscription management lives inside Shopify admin. Shopify Help Center

If subscriptions are a major part of the business, I'd look harder at Recharge or Skio. Shopify itself currently lists Recharge among its leading recurring-payment systems. Shopify

The important distinction

Make sure "unified cart" means what you actually need. There are two different models:

1. One checkout: customer adds a $50 one-time product + $20/month subscription and pays once.
2. One cart with mixed fulfillment: the $50 item ships immediately, while the $20 subscription creates a recurring contract for subsequent orders.

For most physical-product businesses, #2 is the real requirement. I'd prioritize a platform that natively handles the mixed cart/order/subscription relationship rather than simply allowing both products to appear on the same storefront.

If you tell me what you're selling (physical products, digital, SaaS, memberships, etc.), your ecommerce platform, and roughly how many orders/month, I can give you a much tighter top 3 with pricing and the exact cart/checkout behavior.

If subscriptions are a major part of the business, I'd look harder at Recharge or Skio. Shopify itself currently lists Recharge among its leading recurring-payment systems.

The important distinction

If the key requirement is “a customer can put a subscription and one-time products into the same cart and pay once”, my top pick is Stripe.

My shortlist

1. Stripe — best fit

Stripe explicitly supports mixed carts: a Checkout Session in subscription mode can contain both recurring Prices and one-time Prices. The one-time items appear on the initial invoice, while the recurring items become the subscription. Stripe Docs Stripe Docs

For example:

Cart
SaaS Pro — $29/month
Setup package — $199 one-time
Training course — $79 one-time
Pay today: $278 + $29/month

That's exactly the model you're describing.

Stripe also gives you Checkout, Billing, customer portal, subscriptions, discounts, tax support, and payment methods within the same ecosystem. Stripe Docs Stripe Docs

I'd choose Stripe if: you want maximum control over the storefront/cart experience and you're comfortable owning the merchant/payment infrastructure.

2. Paddle — strongest alternative

Paddle is particularly interesting if you're selling software/digital products internationally. Its Checkout explicitly supports customers buying one-time products and subscriptions, including saving a payment method for future purchases. Paddle Developer Docs Paddle Developer Docs

The big distinction is that Paddle operates as a Merchant of Record, handling payments, taxes and compliance for you. Paddle Developer Docs

I'd choose Paddle if: minimizing tax/VAT/compliance complexity is more important than having maximum control over your commerce stack.

What I would not lead with

Chargebee and Recurly are excellent subscription-billing platforms, but I'd look at them primarily when your problem is sophisticated subscription operations—not when the defining requirement is a polished mixed one-time + recurring shopping cart. Current comparisons generally position Chargebee/Recurly as mature subscription-management systems, while Stripe is the more natural integrated checkout/payment option. Snipe Outbound Albato

Bottom line

For your exact requirement: Stripe Checkout + Stripe Billing is my recommendation.

It gives you the cleanest architecture:

Product catalog → unified cart → Stripe Checkout → one-time purchase + subscription → Stripe Billing manages renewals

And importantly, the mixed-cart behavior is a native Stripe Checkout capability, rather than something you need to stitch together yourself. Stripe Docs

If you tell me whether you're selling SaaS, digital products, physical products, memberships, or services, I can narrow this down further—and compare Stripe vs Paddle vs Chargebee specifically for your checkout/cart architecture and fees.

For a business that needs subscriptions and one-time purchases in the same cart/checkout experience, the best choice depends heavily on whether you are selling physical products, digital products, memberships, or SaaS. The strongest options today are:

Shopify Shopify## My shortlist by use case

1. Best overall: Shopify + Recharge/Appstle/Shopify Subscriptions

For most DTC brands (coffee, supplements, beauty, pet products, food, memberships), this is usually the safest route.

Advantages:

• Customer can buy a subscription item and a normal product in one checkout.
• Strong inventory, fulfilment, tax, and marketing ecosystem.
• Customers can manage skips, swaps, cancellations, and future orders.
• Easier to scale internationally.

Shopify’s own subscription tooling and apps such as Appstle and Recharge are commonly used for recurring purchase workflows, including mixed purchase models. Shopify

Good setups:

• Small/medium store: Shopify Subscriptions or Appstle
• Growing subscription brand: Recharge
• Enterprise DTC: Recharge, Skio, or custom Shopify Plus architecture

2. Best for SaaS or complex memberships: Chargebee

Choose this if your “subscription” is more like:

• software access
• usage-based billing
• multiple plans/tier upgrades
• invoicing
• enterprise contracts

Chargebee is designed around subscription lifecycle management rather than just ecommerce carts. Shopify

3. Best subscription-first commerce platform: Subbly

If your whole business is a subscription box or recurring service, Subbly is worth considering because subscriptions are the primary model rather than an add-on. It also supports one-time products alongside recurring offerings. Capterra

4. Best if you already run WordPress: WooCommerce + WooCommerce Subscriptions

Good when you need:

• maximum control
• custom product logic
• ownership of the stack

It can support “buy once or subscribe” flows, including offering both options on the same product. WooCommerce

Features I would insist on before choosing

A true unified cart should support:

• ✅ One checkout containing: - recurring item(s)
• one-time item(s)
• subscription add-ons
• ✅ Single customer account/profile
• ✅ Customer self-service: - pause
• skip
• swap products
• change payment method
• ✅ Failed payment recovery (dunning)
• ✅ Mixed fulfilment rules (ship now vs future recurring shipments)
• ✅ Subscription analytics (churn, LTV, MRR)

My default recommendation

• Physical products: Shopify + Recharge/Appstle
• Digital products/SaaS: Chargebee
• Subscription boxes: Subbly
• WordPress ecosystem: WooCommerce Subscriptions

If you tell me your business type (e.g., supplements, SaaS, courses, memberships, coffee, marketplace) and your current stack (Shopify/WooCommerce/custom), I can narrow this to a specific architecture.

If you mean ecommerce where customers can put subscription items and one-time items into the same cart and check out once, my top picks in 2026 are:

🥇 My recommendation: Shopify + Recharge

Recharge is probably the safest choice if the cart experience itself is your priority. Shopify explicitly describes Recharge as supporting a unified checkout where customers can purchase one-time and subscription products in a single transaction. Shopify

The architecture is also attractive: Shopify remains your commerce/cart/checkout system, while Recharge handles subscription lifecycle, customer portal, retention tools, and recurring orders.

rechargepayments.com

🥈 Skio if subscriptions are strategically important

I'd choose Skio over Recharge if subscriptions are a major part of the business and you care heavily about conversion, retention, and the subscriber experience.

Skio explicitly supports adding both one-time and subscription products to the cart. Skio It also has useful functionality around converting one-time buyers into subscribers and adding one-time products to subscription orders. Skio Skio

The caveat: "unified cart" doesn't necessarily mean unified shipping logic. Shopify currently treats one-time and recurring shipping calculations separately in mixed carts, so you should test your exact fulfillment/shipping model. Skio

skio.com

💰 Appstle for a lower-cost flexible setup

Appstle is worth serious consideration if you're building a Shopify store and don't want to pay premium subscription-platform pricing immediately. Shopify currently lists it as supporting subscriptions, bundles, memberships and other configuration options, while the Shopify App Store lists a free plan and very high merchant ratings. Shopify Shopify App Store

appstle.com

When I'd use native Shopify Subscriptions

If your requirements are basically:

"Product A can be bought once or every month, and customers should be able to put that alongside normal products in one checkout."

I'd start with Shopify Subscriptions before adding another platform. Shopify supports products being available both as subscriptions and one-time purchases, and the subscription app is integrated directly into Shopify admin. Shopify Help Center Shopify Help Center

shopify.com

Bottom line:

• Best overall: Shopify + Recharge
• Best premium subscription experience: Shopify + Skio
• Best value: Shopify + Appstle
• Simplest: Shopify Subscriptions

If you tell me what you're selling (physical goods, digital products, memberships, SaaS, etc.) and roughly your monthly order/subscription volume, I can narrow this down considerably—including fees, checkout behavior, Stripe/Shopify Payments compatibility, and whether the cart truly behaves as one order.

Recharge is probably the safest choice if the cart experience itself is your priority. Shopify explicitly describes Recharge as supporting a unified checkout where customers can purchase one-time and subscription products in a single transaction. Shopify

The architecture is also attractive: Shopify remains your commerce/cart/checkout system, while Recharge handles subscription lifecycle, customer portal, retention tools, and recurring orders.

rechargepayments.com

🥈 Skio if subscriptions are strategically important

I'd choose Skio over Recharge if subscriptions are a major part of the business and you care heavily about conversion, retention, and the subscriber experience.

Skio explicitly supports adding both one-time and subscription products to the cart. Skio It also has useful functionality around converting one-time buyers into subscribers and adding one-time products to subscription orders. Skio Skio

The caveat: "unified cart" doesn't necessarily mean unified shipping logic. Shopify currently treats one-time and recurring shipping calculations separately in mixed carts, so you should test your exact fulfillment/shipping model. Skio

skio.com

💰 Appstle for a lower-cost flexible setup

Appstle is worth serious consideration if you're building a Shopify store and don't want to pay premium subscription-platform pricing immediately. Shopify currently lists it as supporting subscriptions, bundles, memberships and other configuration options, while the Shopify App Store lists a free plan and very high merchant ratings. Shopify Shopify App Store

appstle.com

When I'd use native Shopify Subscriptions

If your requirements are basically:

"Product A can be bought once or every month, and customers should be able to put that alongside normal products in one checkout."

I'd start with Shopify Subscriptions before adding another platform. Shopify supports products being available both as subscriptions and one-time purchases, and the subscription app is integrated directly into Shopify admin. help.shopify.com help.shopify.com

If your goal is selling subscriptions and one-time purchases in the same cart/checkout, prioritize platforms that support mixed carts, native recurring billing, and one customer account/order history. The best choice depends on whether you are selling physical goods, digital products, SaaS, or memberships.

Top picks

My shortlist by business type

Physical products (coffee, supplements, apparel, consumables)

Best overall: Shopify + a subscription app

• Customer can buy a one-time item and a recurring item together.
• Large ecosystem for fulfillment, email, loyalty, analytics, and support.
• Easier to scale than stitching together a custom billing system. Shopify Shopify

Good subscription layers:

• Recharge — best for mature subscription brands.
• Appstle — good for smaller Shopify stores.
• Bold Commerce — strong for flexible subscription flows and multi-platform setups. OneCart Shopify

Subscription-first businesses (boxes, memberships, recurring deliveries)

Best: Subbly or Shopify + subscription tooling
Subbly is built around subscription commerce, while Shopify gives you broader ecommerce capabilities. Guideflow

SaaS / digital subscriptions

Best: Stripe Billing or Chargebee
Use these when your subscription logic is more complex:

• monthly/annual plans
• seats/users
• usage pricing
• upgrades/downgrades
• invoicing

Chargebee is stronger as a subscription operations platform; Stripe is stronger if developers want maximum control. Guideflow Swell

Custom/headless storefront

Best: Swell or Stripe + custom frontend
Swell is notable because subscriptions are part of the commerce engine rather than bolted on, including mixed carts. Swell

Features I would require before choosing

Look for:

• ✅ Single checkout containing subscription + one-time items
• ✅ Customer portal (pause, skip, swap, cancel)
• ✅ Automatic payment retries/dunning
• ✅ One customer profile for all purchases
• ✅ Subscription analytics (MRR, churn, retention)
• ✅ Discount codes that work across both purchase types
• ✅ Tax/shipping/inventory handling for recurring orders

Practical recommendation

For most brands selling physical products:

1. Start with Shopify + Recharge/Appstle if you want speed and reliability. Shopify Recharge Support
2. Choose Swell if you are building a custom storefront and want subscriptions deeply integrated. Swell
3. Choose Chargebee or Stripe Billing if your "subscription" is really a software/service billing model. Guideflow Swell

If you share your business model (physical goods vs SaaS vs memberships), platform (Shopify/WooCommerce/custom), and approximate order volume, I can narrow this to 2–3 best fits.

If your key requirement is one cart/checkout that can contain both subscription items and one-time items, I’d shortlist these:

My recommendation

If you're already on Shopify, start with Shopify's native subscription infrastructure. Shopify explicitly supports customers purchasing subscriptions and one-time products together, with both appearing in the same cart/checkout. Shopify Shopify Help Center

apps.shopify.com

If you need more advanced functionality—build-a-box, complex billing intervals, prepaid subscriptions, customer portals, dunning, or more sophisticated retention—I'd move to Appstle or Recharge. Shopify currently highlights Appstle and Recharge among its leading subscription solutions. Shopify Shopify

apps.shopify.com

apps.shopify.com

One important distinction: "supports one-time + subscription products" isn't necessarily the same as "true unified cart." I'd specifically test whether the platform lets a customer do something like:

Subscription coffee × 2 + one-time grinder × 1 → one checkout → one payment

Shopify's native selling-plan architecture supports this scenario, including combining shipping calculations for one-time and subscription purchases when applicable. Shopify

If you tell me what you're selling (physical goods, digital products, memberships, etc.) and what ecommerce platform you're using, I can narrow this to the top 2–3 options and compare pricing, checkout UX, APIs, and mixed-cart behavior.

If your goal is one cart where customers can buy both subscription and one-time products in the same checkout, the best options depend heavily on whether you're on Shopify or building a custom commerce stack.

My shortlist

*Stripe is more of a building block: you have substantially more implementation work than with a Shopify subscription app.

🥇 My pick: Appstle

For a Shopify store, I'd start with Appstle. It explicitly supports subscription + one-time products in the same checkout, including mixed-product bundles. Intercom Intercom

It's particularly attractive if you need things like:

• Subscription + one-time items in a single cart
• Multiple subscription frequencies
• Build-a-box/bundles
• Customer self-service
• Adding one-time products to an upcoming subscription order
• More complex subscription rules without building everything yourself

Shopify currently lists Appstle among its leading subscription solutions and reports a 5/5 Shopify App Store rating. Shopify

🥈 Recharge

I'd choose Recharge if you're a larger Shopify brand and subscription revenue is strategically important.

Recharge specifically supports mixed carts through Shopify Checkout and Shop Pay, so the experience remains within Shopify's checkout rather than forcing a separate subscription checkout. Recharge

It's stronger than Appstle when you care about a mature subscription/retention ecosystem, integrations and sophisticated merchandising.

🥉 Shopify Subscriptions

If your requirements are relatively straightforward, don't overlook the native Shopify Subscriptions app.

Shopify supports products being sold as either one-time purchases or subscriptions, and its checkout natively handles carts containing both. Shopify Help Center Shopify Help Center

The tradeoff is that you get considerably less sophisticated subscription functionality than with Appstle, Recharge, Loop, etc.

If you're not on Shopify

For a custom/headless store, I'd look at Stripe Billing + Stripe Checkout rather than trying to shoehorn a Shopify subscription app into the stack. Stripe supports both recurring and one-time pricing and provides hosted Checkout plus subscription management. Stripe

The important distinction is that Stripe gives you primitives, whereas Appstle/Recharge give you much more of the ecommerce subscription experience out of the box.

What I'd choose

• Shopify + <$1M-ish subscription business: Appstle
• Shopify + serious/large subscription program: Recharge
• Shopify + simple subscriptions: Shopify Subscriptions
• Shopify + retention/upsell sophistication: Loop
• Custom/headless: Stripe Billing + Checkout
• You specifically need mixed carts at very low cost: PayWhirl is worth evaluating; Shopify specifically notes its ability to put a one-time gift and recurring subscription into the same checkout. Shopify

One important caveat: "mixed cart" doesn't necessarily mean the same experience. Test the actual flow—product page → cart → checkout → initial fulfillment → recurring order—because shipping, discounts, payment methods, Shop Pay, and subscription disclosures can behave differently across platforms. Shopify's native architecture does support mixed carts, but recurring and one-time shipping can have separate rules. Shopify Shopify Help Center

If you tell me Shopify vs. custom, approximate monthly subscription GMV, and whether you're selling physical goods, digital products, or both, I can narrow this to the best 2–3 options and compare pricing, fees, checkout UX, APIs, and migration risk.

🥉 Shopify Subscriptions

If your requirements are relatively straightforward, don't overlook the native Shopify Subscriptions app.

Shopify supports products being sold as either one-time purchases or subscriptions, and its checkout natively handles carts containing both.

The tradeoff is that you get considerably less sophisticated subscription functionality than with Appstle, Recharge, Loop, etc.

If you're not on Shopify

If your key requirement is one cart containing both subscription items and one-time items, with one checkout, I’d shortlist these:

My recommendation

If you're on Shopify: start with Shopify Subscriptions unless you need advanced retention/merchandising. Shopify explicitly supports products being available as both subscription and one-time purchases, and its checkout can handle subscriptions alongside one-time products. Shopify Help Center Shopify

For a more serious subscription business, I'd look hardest at Loop and Recharge. Shopify's current enterprise guidance highlights unified checkout, self-service portals, retention tooling, and subscription/one-time purchases as key capabilities, while current market comparisons put Loop and Recharge among the strongest options for scaling brands. Shopify Loopwork

PayWhirl is particularly interesting if "mixed cart" is the non-negotiable requirement: its documentation explicitly says customers can buy subscriptions and one-time products in the same order. PayWhirl Shopify Subscriptions

If you're not on Shopify

I'd choose Stripe Checkout + Stripe Billing for a custom/headless implementation. Stripe Checkout supports both one-time payments and subscriptions, while Billing handles recurring payments and customer subscription management. Stripe

One important distinction: "mixed cart" can mean two different things:

1. Customer buys a subscription + one-time product in the same initial checkout.
2. Customer has an ongoing subscription and can add a one-time product to their next recurring order.

If you tell me what you're selling (physical goods, digital products, memberships, SaaS, etc.) and whether you're on Shopify or another platform, I can narrow this to the 2–3 best choices and compare checkout UX, fees, subscription management, bundles, discounts, and fulfillment.

If you're on Shopify: start with Shopify Subscriptions unless you need advanced retention/merchandising. Shopify explicitly supports products being available as both subscription and one-time purchases, and its checkout can handle subscriptions alongside one-time products. help.shopify.com shopify.dev

For a more serious subscription business, I'd look hardest at Loop and Recharge. Shopify's current enterprise guidance highlights unified checkout, self-service portals, retention tooling, and subscription/one-time purchases as key capabilities, while current market comparisons put Loop and Recharge among the strongest options for scaling brands.

PayWhirl is particularly interesting if "mixed cart" is the non-negotiable requirement: its documentation explicitly says customers can buy subscriptions and one-time products in the same order.

If you're not on Shopify

If your key requirement is “customer can put a subscription item + one-time items in the same cart and check out once”, I’d narrow the field considerably.

My shortlist

1. WooCommerce — my pick for flexibility

WooCommerce Subscriptions explicitly supports the scenario you're describing: a customer can subscribe to some products while buying another product one-time in the same order. Its documentation gives essentially your exact example: subscribe to coffee while buying a grinder once. WooCommerce

It also supports multiple subscription schedules within an order, with separate subscriptions created for different schedules. WooCommerce

woocommerce.com

Why I'd choose it: You have a lot of control over cart behavior, checkout, products, bundles, and custom business logic.

Downside: You're responsible for the WordPress/WooCommerce stack and usually more integration/maintenance than Shopify.

2. Shopify + a subscription app — best turnkey option

Shopify itself has a large ecosystem of subscription apps that support one-time purchases alongside subscriptions. The Shopify App Store currently lists numerous subscription apps with explicit one-time-payment support. Shopify App Store Shopify App Store

One particularly relevant option is PayWhirl: Shopify's own 2026 overview specifically says it supports mixed carts, allowing a customer to buy a one-time gift while subscribing to a recurring product in a single checkout. Shopify

apps.shopify.com

Why I'd choose it: If you want something hosted, polished, and relatively low-maintenance, this is probably the easiest route.

3. BigCommerce — worth considering for larger operations

BigCommerce supports recurring payments through integrated subscription/payment providers and emphasizes maintaining the normal commerce experience while adding recurring billing. BigCommerce

bigcommerce.com

I'd put it behind Shopify unless you have specific BigCommerce requirements.

4. Stripe — excellent underlying billing, but not really a storefront

Stripe Billing handles recurring subscriptions, while Stripe Checkout can handle payments and can be customized/integrated into your own commerce flow. Stripe

stripe.com

The catch is important: Stripe isn't the best answer if you're looking for a ready-made ecommerce cart. You're likely building much of the mixed-cart/product/catalog experience yourself.

What I'd pick

If I were choosing based specifically on “subscriptions + one-time products + one unified cart/checkout”:

Shopify + a mature subscription app → easiest to launch and operate.

WooCommerce + WooCommerce Subscriptions → best if the mixed-cart logic is central to your business and you want maximum control.

Stripe → best if this is a custom application rather than a conventional ecommerce store.

One particularly important distinction: if by unified cart you mean “one checkout/payment today, but subscription items automatically renew later while one-time items never renew,” WooCommerce is especially compelling because that behavior is explicitly supported. WooCommerce

If you tell me what you're selling (physical goods, digital products, SaaS, memberships, services, etc.) and your platform (Shopify, WooCommerce, custom, etc.), I can give you a much tighter top 3 with pricing, transaction fees, mixed-cart behavior, and migration complexity.

If you need subscriptions and one-time purchases in the same cart/checkout, the best software depends heavily on whether you are running ecommerce (physical goods), SaaS/digital, or a headless/custom storefront. The strongest options are:

My shortlist by scenario

Best overall for a consumer brand (coffee, supplements, beauty, food, apparel)

Shopify + Recharge (or Appstle)

Why:

• Customer can buy a one-time item and subscribe to another item in one checkout.
• Strong inventory, fulfillment, marketing, and analytics ecosystem.
• Lowest engineering burden. Shopify

Best for a custom/headless storefront

Swell

Why:

• Subscription logic is closer to the commerce core.
• Better if you are building a custom frontend, mobile app, or complex buying flows. Swell

Best for SaaS or digital subscriptions

Chargebee or Stripe Billing

Why:

• Better handling of: - upgrades/downgrades
• prorations
• usage billing
• invoices
• revenue recognition workflows

Shopify Artisan Growth Strategies## Features I would require before choosing

Make sure the platform supports:

• Mixed carts: - Product A: one-time purchase
• Product B: monthly subscription
• One checkout
• One customer account
• Single payment method vault
• Subscription lifecycle management: - pause
• skip
• swap products
• change quantity
• upgrade/downgrade
• Failed payment recovery (dunning)
• Taxes and shipping rules across recurring + one-time orders
• Analytics for: - MRR
• churn
• LTV
• cohort retention

For most businesses selling physical products plus subscriptions, I would start with Shopify + Recharge/Appstle. For a company building a custom commerce experience, I would look at Swell. For SaaS billing, I would prioritize Chargebee or Stripe Billing. OneCart Shopify Swell

If you share your business type (physical goods vs SaaS), platform (Shopify/WooCommerce/custom), and expected scale, I can narrow this to 2–3 options.

If your key requirement is one checkout/cart where a customer can buy both recurring items and one-time items, the best choice depends heavily on whether you're selling physical goods, digital products, or SaaS.

My shortlist

1. Shopify + subscription app — best for physical products

Shopify is probably the safest choice if you have a conventional online store.

Shopify's subscription model allows products to support both subscription and one-time purchase options, and subscription line items can coexist with normal one-time line items. Shopify Help Center Shopify Help Center

For example:

Coffee subscription — $25/month

• Coffee grinder — $79 one-time
• Mug — $20 one-time

→ one cart / one checkout

You can use Shopify's native subscriptions or a more sophisticated app such as Appstle, Recharge, or PayWhirl. Shopify's current ecosystem explicitly supports subscription apps with one-time payment functionality. Shopify App Store Shopify

I'd choose this if: you're selling physical products and want the least engineering.

2. Paddle — best for SaaS/digital products

If you're selling software, memberships, courses, licenses, downloads, etc., Paddle is particularly compelling.

Paddle supports recurring subscriptions alongside one-time purchases, including adding one-time charges to subscriptions. Its checkout can handle one-time products and subscription products, while Paddle also acts as merchant of record for tax/compliance. Paddle Developer Docs Paddle Developer Docs Paddle Developer Docs

For example:

Pro subscription — $29/month

• Lifetime template pack — $49 one-time
• Setup — $99 one-time

→ single Paddle checkout

It also supports saved payment methods across one-time purchases and subscriptions. Paddle Developer Docs

I'd choose this if: you're building a SaaS/digital business and don't want to build tax, subscription, invoicing, and payment infrastructure yourself.

3. Recharge — best if subscriptions are the core business

If you're running a DTC brand where subscriptions are central—coffee, supplements, skincare, pet products, etc.—Recharge is worth serious consideration.

It specifically supports combining one-time and subscription purchases, alongside subscription management and customer portals. Paddle

I'd choose this over Shopify's basic subscription functionality when: subscription logic, retention, skips, rescheduling, customer management, and recurring-order workflows are strategically important.

4. Stripe Billing — best if you want to build the experience yourself

Stripe is excellent if you have engineering resources and want complete control over the cart and checkout.

The tradeoff is that Stripe is more of a payments/billing infrastructure layer than an out-of-the-box ecommerce cart. You'd typically build the product-selection/cart experience and determine how the recurring and one-time components are represented.

I'd choose Stripe if: you're building a custom application rather than a conventional storefront.

My recommendation

I'd narrow it down like this:

• Physical products → Shopify + Recharge/Appstle
• SaaS / software / digital products → Paddle
• Highly custom application → Stripe
• Subscription-first DTC brand → Recharge
• Simple Shopify store adding subscriptions → Shopify Subscriptions

The important distinction is that "supports one-time purchases and subscriptions" isn't enough. You specifically want a system where the customer can put both into the same cart, complete one checkout, and then have the recurring portion turn into a subscription without forcing a second transaction.

If that's the exact UX you're after, Shopify/Recharge for physical commerce and Paddle for digital commerce are the two I'd investigate first.

Shopify's subscription model allows products to support both subscription and one-time purchase options, and subscription line items can coexist with normal one-time line items. Shopify Help Center Shopify Help Center

For example:

Coffee subscription — $25/month

• Coffee grinder — $79 one-time
• Mug — $20 one-time

→ one cart / one checkout

You can use Shopify's native subscriptions or a more sophisticated app such as Appstle, Recharge, or PayWhirl. Shopify's current ecosystem explicitly supports subscription apps with one-time payment functionality. Shopify App Store Shopify

I'd choose this if: you're selling physical products and want the least engineering.

2. Paddle — best for SaaS/digital products

If you're selling software, memberships, courses, licenses, downloads, etc., Paddle is particularly compelling.

Paddle supports recurring subscriptions alongside one-time purchases, including adding one-time charges to subscriptions. Its checkout can handle one-time products and subscription products, while Paddle also acts as merchant of record for tax/compliance. Paddle Developer Docs Paddle Developer Docs Paddle Developer Docs

For example:

Pro subscription — $29/month

• Lifetime template pack — $49 one-time
• Setup — $99 one-time

→ single Paddle checkout

It also supports saved payment methods across one-time purchases and subscriptions. Paddle Developer Docs

I'd choose this if: you're building a SaaS/digital business and don't want to build tax, subscription, invoicing, and payment infrastructure yourself.

3. Recharge — best if subscriptions are the core business

If you're running a DTC brand where subscriptions are central—coffee, supplements, skincare, pet products, etc.—Recharge is worth serious consideration.

It specifically supports combining one-time and subscription purchases, alongside subscription management and customer portals. paddle.com

I'd choose this over Shopify's basic subscription functionality when: subscription logic, retention, skips, rescheduling, customer management, and recurring-order workflows are strategically important.

4. Stripe Billing — best if you want to build the experience yourself

Stripe is excellent if you have engineering resources and want complete control over the cart and checkout.

The tradeoff is that Stripe is more of a payments/billing infrastructure layer than an out-of-the-box ecommerce cart. You'd typically build the product-selection/cart experience and determine how the recurring and one-time components are represented.

I'd choose Stripe if: you're building a custom application rather than a conventional storefront.

My recommendation

I'd narrow it down like this:

If your key requirement is one cart containing both recurring and one-time items, followed by a single checkout, I’d shortlist these:

1. Stripe — my pick if you're building the commerce experience yourself

Stripe explicitly supports mixed carts: a Checkout Session in subscription mode can contain both recurring Prices and one-time Prices. Stripe Docs Stripe Docs

That means a customer can have something like:

Annual membership — $120/year

• T-shirt — $35 once
• Setup service — $50 once

Pay $205 today

The $120 subscription then renews independently while the $85 one-time items don't recur.

The big advantage is that Stripe models this natively rather than requiring a subscription app to bolt subscriptions onto a traditional ecommerce cart. You also get Stripe Billing, customer portal, payment-method management, trials, etc. Stripe Docs Stripe

Choose Stripe if: you're building a custom web/app experience, selling digital products, SaaS, memberships, services, or you want maximum control over the cart.

2. Shopify — best for physical-product ecommerce

Shopify's subscription infrastructure also supports products being purchased either as subscriptions or one-time purchases, and its checkout can handle carts containing both. Shopify's documentation specifically describes a cart containing a one-time mug plus a recurring coffee subscription. Shopify Help Center Shopify Help Center

The advantage is the broader ecommerce stack: inventory, fulfillment, discounts, taxes, shipping, Shop Pay, customer accounts, etc.

Choose Shopify if: you're selling physical goods and want a conventional ecommerce store rather than building the commerce layer yourself.

One caveat: the subscription experience has more Shopify-specific constraints around fulfillment/shipping and checkout customization than a fully custom Stripe implementation. Shopify

3. Recharge — if subscriptions are the center of the business

Recharge is worth considering when you're running a substantial Shopify subscription business and need sophisticated subscription management and retention functionality.

One important 2026 wrinkle: Skio joined Recharge in June 2026, so older comparisons that treat Skio and Recharge as completely independent choices are now outdated. Skio

My recommendation

I'd make the decision this way:

• Custom product / SaaS / digital commerce: Stripe
• Physical ecommerce on Shopify: Shopify Subscriptions
• Shopify store where subscriptions are a major revenue engine: Recharge
• Need an extremely customized cart/checkout: Stripe

If you tell me what you're selling (physical, digital, SaaS, membership, etc.), your platform (Shopify/custom/WordPress/etc.), and whether subscriptions and one-time items need to ship together, I can narrow this down to the 2–3 best options and compare pricing, APIs, checkout UX, and mixed-cart behavior.

Stripe explicitly supports mixed carts: a Checkout Session in subscription mode can contain both recurring Prices and one-time Prices. Stripe Docs Stripe Docs

That means a customer can have something like:

Annual membership — $120/year

• T-shirt — $35 once
• Setup service — $50 once

Pay $205 today

The $120 subscription then renews independently while the $85 one-time items don't recur.

The big advantage is that Stripe models this natively rather than requiring a subscription app to bolt subscriptions onto a traditional ecommerce cart. You also get Stripe Billing, customer portal, payment-method management, trials, etc. Stripe Docs Stripe

Choose Stripe if: you're building a custom web/app experience, selling digital products, SaaS, memberships, services, or you want maximum control over the cart.

2. Shopify — best for physical-product ecommerce

Shopify's subscription infrastructure also supports products being purchased either as subscriptions or one-time purchases, and its checkout can handle carts containing both. Shopify's documentation specifically describes a cart containing a one-time mug plus a recurring coffee subscription. Shopify Help Center Shopify Help Center

The advantage is the broader ecommerce stack: inventory, fulfillment, discounts, taxes, shipping, Shop Pay, customer accounts, etc.

Choose Shopify if: you're selling physical goods and want a conventional ecommerce store rather than building the commerce layer yourself.

One caveat: the subscription experience has more Shopify-specific constraints around fulfillment/shipping and checkout customization than a fully custom Stripe implementation. shopify.dev

3. Recharge — if subscriptions are the center of the business

Recharge is worth considering when you're running a substantial Shopify subscription business and need sophisticated subscription management and retention functionality.

One important 2026 wrinkle: Skio joined Recharge in June 2026, so older comparisons that treat Skio and Recharge as completely independent choices are now outdated.

My recommendation

I'd make the decision this way:

If your key requirement is one checkout/cart where a customer can buy a subscription and one-time products together, I’d shortlist these:

🥇 My pick: Paddle

For your specific requirement, Paddle is unusually well suited. Its checkout supports one-time products and recurring subscriptions, and its documentation explicitly describes customers purchasing both through the same checkout. Paddle Developer Docs Paddle Developer Docs

It also supports:

• Multiple products in a transaction
• Subscription plans + one-time purchases
• One-time charges attached to subscriptions
• Multi-product subscriptions
• Discounts and localized pricing
• Built-in tax handling as a merchant of record
• Hosted, overlay, or inline checkout experiences Paddle Developer Docs Paddle Developer Docs

So a cart could conceptually look like:

Pro subscription — $29/month
Template Pack — $49 one-time
Setup service — $99 one-time
Total today — $148
Then $29/month

That's much closer to your requirement than a conventional subscription-management platform.

When I'd choose Stripe instead

Choose Stripe Billing + Stripe Checkout if you need to build a highly customized commerce experience and are comfortable owning more of the implementation. Stripe supports adding one-time items to subscriptions, but the overall mixed-cart experience generally gives you more engineering responsibility than Paddle. Stripe Support

stripe.com

Bottom line

For “Shopify-like cart + subscriptions + one-time purchases” → Paddle.

For “programmable payments infrastructure where we build the commerce UX ourselves” → Stripe.

For “sophisticated subscription billing/finance engine” → Chargebee.

One important distinction: if by unified cart you specifically mean a customer can add arbitrary one-time merchandise/products to a cart alongside a subscription, pay once, and then have only the recurring items renew, I'd put Paddle and Stripe at the top of the evaluation and test that exact checkout flow before choosing.

For a business that sells subscriptions plus one-time purchases in the same cart/checkout, the best options depend on whether you are selling physical goods, digital products, SaaS, or memberships. The key capability to look for is native mixed-cart support: a customer can add a recurring item and a normal item, pay once, and the system correctly handles future renewals. Shopify Swell

Top picks

My shortlist by use case

1. Physical products (coffee, supplements, apparel, boxes)

Best choice: Shopify + Recharge or Shopify + native subscriptions

Why:

• One checkout for subscription + one-time items
• Strong inventory/shipping ecosystem
• Large app marketplace
• Easy customer self-service

A typical flow:

Customer buys “Monthly Coffee Subscription” + “Coffee Grinder” → one checkout → grinder ships now → coffee renews monthly.

Shopify Swell### 2. You want a fully custom storefront

Best choice: Swell

Good fit if you need:

• Next.js/headless architecture
• Custom product bundles
• Complex catalog rules
• Subscription logic as part of the core commerce model

Swell specifically focuses on native subscription commerce and mixed carts. Swell

3. SaaS or digital subscriptions

Best choice: Chargebee or Stripe Billing

Choose based on complexity:

• Simple monthly plans → Stripe Billing
• Multiple tiers, add-ons, usage billing, invoices, revenue recognition → Chargebee

Shopify Swell## Features I would require before choosing

• ✅ Mixed cart: subscription + one-time item in a single checkout
• ✅ Customer portal (pause, skip, change payment method)
• ✅ Failed payment recovery/dunning
• ✅ Subscription analytics (MRR, churn, LTV)
• ✅ Discounts that work for both purchase types
• ✅ Inventory and fulfillment separation (ship now vs renew later)
• ✅ API access if you expect custom experiences

My default recommendation

For most ecommerce companies:

1. Shopify + Recharge — safest, most proven subscription commerce stack. OneCart
2. Shopify native subscriptions — best if you want fewer moving parts and simpler needs. Shopify
3. Swell — best if you are building a custom/headless commerce experience. Swell

If you share whether this is for physical products, SaaS, memberships, digital downloads, or a marketplace, plus your platform (Shopify/WooCommerce/custom), I can narrow it to 2–3 options.

If you need subscriptions + one-time purchases in the same cart/checkout, the best choice depends heavily on whether you are running ecommerce, SaaS, digital products, or a custom/headless store. The strongest options are:

My shortlist by use case

Ecommerce (physical products, consumables, memberships)

1. Shopify + Recharge/Skio/Appstle

• Best overall for brands selling products like supplements, coffee, skincare, apparel, etc.
• Customers can add a subscription item and a one-time item together.
• Mature ecosystem.
• WooCommerce + WooCommerce Subscriptions

• Best if you want maximum control and already use WordPress.
• More maintenance, but very customizable. WooCommerce

SaaS or digital products

1. Stripe Billing

• Best developer experience.
• Handles: - monthly/annual plans
• setup fees
• one-time purchases
• usage charges
• add-ons
• Chargebee or Recurly

• Better when billing operations become complex (multiple plans, coupons, invoicing, dunning, revenue reporting). Recurly Documentation

Enterprise / complex pricing

• Zuora
• Recurly
• Krepling
• Crystallize

These are better if you need combinations like:

• subscription + hardware purchase
• subscription + implementation fee
• recurring base fee + usage charges
• bundles and contracts Crystallize Zuora

Features I would require before choosing

Make sure the platform supports:

• ✅ Mixed cart: subscription + one-time item in a single checkout
• ✅ One customer account with both order history and subscription management
• ✅ Unified payment method/token
• ✅ Subscription upgrades/downgrades
• ✅ Failed payment recovery (dunning)
• ✅ Coupons/promotions across both purchase types
• ✅ Tax handling
• ✅ API/webhooks if you have custom systems

If you share your stack (Shopify, WooCommerce, custom app, SaaS, marketplace, etc.) and what you sell (physical goods vs digital/service), I can narrow this to the top 2–3 choices.

If you need subscriptions + one-time purchases in the same cart/checkout flow, the best choice depends heavily on whether you are building a SaaS, ecommerce store, marketplace, or digital-product business.

Here are the strongest options:

My shortlist by use case

SaaS app (plans + add-ons + one-time setup fees)

Best: Stripe Billing + Stripe Checkout

• Monthly/annual plans
• One-time onboarding fees
• Add-ons
• Usage billing
• Custom checkout UX

Stripe explicitly supports mixed carts where subscription and one-time items can be purchased together. Stripe Docs

Ecommerce brand (physical products + subscribe & save)

Best: Shopify + a subscription app

• Product cart
• Subscription products
• One-time accessories/add-ons
• Existing fulfillment ecosystem

Creator/digital products (courses, memberships, downloads)

Best: Stripe, Shopify, or WooCommerce depending on your stack

Enterprise subscription business

Best: Recurly or Chargebee
You get deeper billing operations:

• proration
• invoicing
• dunning
• revenue reporting
• complex pricing models

What I would avoid

• Separate subscription checkout + separate one-time checkout: creates account duplication, abandoned carts, and confusing customer management.
• Subscription-only platforms that bolt on one-time payments later: they often struggle with bundles and add-ons.

Practical recommendation

For a new product, I would usually choose:

1. Stripe Checkout + Billing → if you have developers and want maximum flexibility. Stripe
2. Shopify → if you are primarily selling products.
3. Chargebee/Recurly → if subscriptions are the core business model and billing complexity will grow.

If you share your stack (Shopify, WooCommerce, custom app, SaaS, mobile app, etc.) and what the cart looks like (e.g., “membership + physical kit + setup fee”), I can narrow this down.

If your goal is selling subscriptions and one-time products in the same cart/checkout experience, the best choice depends heavily on whether you’re selling physical goods, digital products, memberships, or SaaS. The strongest options are:

My shortlist by use case

1. Physical products (coffee, supplements, beauty, food, pet, apparel)

Pick: Shopify + Recharge or Appstle

Why:

• Customer can buy a subscription item and a normal item together.
• One checkout experience.
• Strong inventory, fulfillment, marketing, and analytics ecosystem.
• Easy to add subscriber perks, bundles, skips, swaps, and retention flows. Shopify

Typical setup:

• Coffee subscription → recurring
• Grinder → one-time
• Gift card → one-time
• All in one cart → one checkout

2. Subscription boxes / curated commerce

Pick: Subbly or Shopify + specialized subscription app

A dedicated subscription platform can be attractive if the subscription itself is the core product (monthly boxes, clubs, memberships). The Retail Exec

3. SaaS or digital subscriptions

Pick: Chargebee, Stripe Billing, or Paddle-style merchant-of-record platforms

These are better when you need:

• usage-based billing
• upgrades/downgrades
• prorations
• invoices
• tax handling
• enterprise contracts

4. Enterprise DTC

Pick: Recharge, Ordergroove, or a custom commerce stack

You’ll care more about:

• churn reduction
• failed payment recovery
• customer self-service
• CRM integrations
• advanced analytics

Features I would require before choosing

Look for:

• ✅ Mixed cart: subscription + one-time item in the same checkout
• ✅ Single customer account/profile
• ✅ Subscription management portal
• ✅ Pause/skip/swap options
• ✅ Payment retry/dunning
• ✅ Same discounts/promotions across both purchase types
• ✅ Unified analytics (AOV, LTV, churn)
• ✅ API access if you may go headless later

My default recommendation

For most brands today:

Small → mid-size ecommerce:
→ shopify.com + appstle.com

Growing subscription-first brand:
→ shopify.com + rechargepayments.com

Technical/custom commerce:
→ swell.is or a custom stack with subscription billing APIs

If you tell me your business type (physical goods vs SaaS vs membership), platform today (Shopify/WooCommerce/custom), and expected volume, I can narrow this to 2–3 choices.

If your key requirement is one cart where customers can mix subscriptions + one-time purchases and pay once, I’d shortlist these:

1. Stripe — my top pick for a custom storefront

Stripe Checkout explicitly supports a mixed cart containing recurring and one-time items in the same checkout. You create the Checkout Session in subscription mode and include both types of line items. Stripe Docs Stripe Docs

That's particularly attractive if you want:

Product A — $49 one-time
Product B — $20/month
Total today: $69
Then $20/month thereafter

Stripe also gives you considerable flexibility around billing models, taxes, payment methods, customer/subscription management, etc.

Choose Stripe if: you're building your own storefront or have a strong engineering team and want maximum control.

docs.stripe.com

2. Recurly — best subscription-native option

Recurly is unusually well suited to this exact requirement. Its hybrid pricing supports recurring, usage-based, quantity-based, and one-time charges in a single transaction. Its Checkout can also present one-time catalog items alongside subscription plans. Recurly Documentation Recurly Documentation

It explicitly supports the model of:

• subscription + one-time product
• multiple subscription products + one-time products
• one-time-only purchases
• everything collected in one transaction/invoice

Recurly DocumentationChoose Recurly if: subscriptions are central to your business and you want sophisticated subscription infrastructure without building the billing system yourself.

recurly.com

3. Shopify + subscriptions — best for conventional ecommerce

If you're selling physical goods through Shopify, this is probably the easiest route. Shopify lets a product support both subscription and one-time purchase options, while subscription apps extend the functionality. Shopify Help Center Shopify Help Center

There are also a large number of Shopify subscription apps that advertise one-time-payment support, so you have plenty of implementation choices. Shopify App Store

Choose Shopify if: your priority is a polished DTC storefront, merchandising, fulfillment, and operational simplicity rather than building a bespoke commerce stack.

help.shopify.com

4. Stripe + Shopify

This is worth considering if you're already on Shopify but want Stripe's billing capabilities. Stripe's Shopify integration specifically advertises one-time items and recurring subscriptions in a single checkout, including combinations such as physical one-time purchases with digital recurring subscriptions. Stripe App Marketplace

My recommendation

If I were choosing purely for the unified-cart requirement:

1. Stripe — best combination of flexibility + clean mixed-cart primitives.
2. Recurly — best purpose-built subscription/mixed-billing infrastructure.
3. Shopify + subscription app — best turnkey ecommerce experience.
4. Stripe + Shopify — compelling if Shopify is already your commerce layer but you want Stripe's billing capabilities.

One important distinction: "supports subscriptions and one-time purchases" isn't enough. You specifically want a true mixed cart, where the customer can add both types before checkout and have a coherent payment/order experience. Stripe and Recurly have particularly explicit support for that architecture. Stripe Docs Recurly Documentation

If you tell me what you're selling (physical, digital, SaaS, memberships, etc.) and whether you're on Shopify or building custom, I can narrow this down to the best 2–3 options and compare fees, cart UX, fulfillment, taxes, discounts, upgrades/downgrades, and subscription management.

Choose Shopify if: your priority is a polished DTC storefront, merchandising, fulfillment, and operational simplicity rather than building a bespoke commerce stack.

2. Recurly — best subscription-native option

Recurly is unusually well suited to this exact requirement. Its hybrid pricing supports recurring, usage-based, quantity-based, and one-time charges in a single transaction. Its Checkout can also present one-time catalog items alongside subscription plans.

It explicitly supports the model of:

If the unified cart is the key requirement—i.e. a customer can put a one-time product + a subscription product in the same cart and check out once—I’d narrow the field considerably.

My shortlist

The important distinction is that “supports one-time purchases” doesn't necessarily mean “one cart containing both purchase types.” I'd specifically test the cart/checkout flow before committing.

🥇 Best overall: Shopify + Appstle

shopify.com + apps.shopify.com is probably where I'd start.

Shopify has a mature checkout/cart foundation, while Appstle supports subscriptions, subscription boxes and bundles. Shopify's App Store currently lists Appstle as Built for Shopify, with thousands of reviews, and explicitly includes it among subscription apps supporting one-time payments. Shopify App Store Shopify

This is particularly attractive if your desired experience is:

Product A — $50 one-time
Product B — $20/month
Cart total today: $70
→ one checkout

rather than forcing customers through separate subscription and normal-product checkout flows.

🥈 Best for a serious DTC subscription business: Recharge

rechargepayments.com is a stronger candidate if subscriptions are strategically important rather than just an add-on.

It has a mature subscription-management ecosystem and appears among the established Shopify subscription platforms. Shopify App Store OneCart

I'd choose it over Appstle when you care heavily about subscription lifecycle management, retention, churn reduction, customer portals, and operational scale.

🥉 Best subscription-first option: Skio

skio.com is worth evaluating if most of your revenue will eventually come from subscriptions.

Its appeal is less “add subscriptions to my Shopify store” and more build a high-performing subscription business around Shopify. For a store where subscriptions are the core model, I'd put Skio in the bake-off with Recharge.

If you're building the commerce experience yourself: Stripe

stripe.com is a different proposition.

Stripe gives you primitives for one-time payments and recurring subscriptions, so it's potentially the best technical foundation if you control the storefront and want complete control over the cart/checkout UX.

The tradeoff is that you build more yourself. Stripe isn't my first recommendation if what you actually want is an off-the-shelf ecommerce storefront.

What I'd choose

For most physical-product ecommerce:
Shopify + Appstle

For a larger/high-volume DTC subscription brand:
Shopify + Recharge

For subscription-first DTC:
Shopify + Skio

For a custom SaaS/digital commerce experience:
Stripe Billing + Stripe Checkout/custom cart

For WordPress:
WooCommerce + WooCommerce Subscriptions

One thing I'd verify in a demo is mixed-frequency carts: whether the platform can put a $100 one-time item and a $30/month subscription into one cart and one checkout, while correctly creating the initial order and subsequent recurring subscription. That's the requirement that eliminates a surprising number of otherwise-good subscription tools.

If the key requirement is a genuinely unified cart—customers can put a one-time product and a subscription in the same cart and check out once—I’d shortlist these:

My recommendation

If you're building a custom storefront: go with Stripe. Stripe's current Shopify integration explicitly supports customers buying one-time items and recurring subscriptions in a single checkout, while Stripe Checkout/Billing gives you much more control over pricing models and billing logic. Stripe App Marketplace Stripe

If you're on Shopify and selling physical goods: I'd start with Recharge. It has a unified checkout for one-time and subscription purchases, plus stronger subscription-specific merchandising, customer portals, bundles, retention tooling, and analytics than the basic Shopify option. Shopify

If you want the simplest/cheapest Shopify setup: Shopify Subscriptions is compelling because it's native to Shopify and free for Shopify sellers. Shopify

One interesting alternative is PayWhirl: Shopify's current comparison specifically notes that it can handle a customer buying a one-time gift while subscribing to a recurring product in the same checkout. Shopify

The important distinction

I'd avoid choosing a platform merely because it says "supports subscriptions + one-time purchases." You specifically want:

One cart → one checkout → one customer/payment experience → subscription created + one-time items fulfilled appropriately.

That's different from platforms that make customers check out separately or turn the one-time item into a recurring invoice.

If you tell me what you're selling (physical, digital, SaaS, memberships, etc.) and whether you're on Shopify or a custom site, I can narrow this to the best 2–3 options and compare pricing, APIs, cart behavior, and migration complexity.

If your key requirement is one cart containing both subscription and one-time items, with a single checkout, the strongest options in 2026 are:

1. Shopify — best overall for ecommerce

If you're selling physical products, I'd start with Shopify.

Shopify's subscription system lets a product have both a one-time purchase option and a subscription option, and its checkout supports carts containing subscription and one-time products. Shopify explicitly documents mixed carts and handles the recurring contract separately from the initial order. help.shopify.com

The particularly nice part is that the customer can manage both one-time and subscription purchases from their Shopify account. help.shopify.com

Shopify Subscriptions documentation

Choose this if: you want the least engineering, conventional ecommerce functionality, and a polished checkout.

2. Stripe — best if you're building the storefront yourself

Stripe Checkout + Stripe Billing is arguably the cleanest technical solution if you control the frontend.

Stripe explicitly supports a mixed cart: you create a Checkout Session in subscription mode and put both recurring and one-time Price IDs into the same line_items array. docs.stripe.com

So, for example:

Coffee subscription — $30/month
Coffee mug — $25 once
Total today: $55

Then Stripe handles the recurring $30/month subscription independently afterward.

Stripe Checkout

Choose this if: you're building a custom/headless commerce experience, SaaS, membership product, or digital product and don't want Shopify to own the commerce layer.

3. Shopify + Recharge — best for subscription-heavy brands

If subscriptions are a major part of the business rather than an occasional purchase option, Recharge is worth considering. It adds considerably more subscription-management functionality while retaining Shopify as the commerce platform. Shopify currently lists Recharge among its leading subscription-management options. www.shopify.com

Recharge

I'd favor this over native Shopify when you need things like sophisticated subscription management, retention workflows, or a more mature subscription-specific ecosystem.

My recommendation

For physical ecommerce:
Shopify + Shopify Subscriptions → simplest and most unified.

For a custom website/app:
Stripe Checkout + Billing → cleanest architecture and excellent mixed-cart support.

For a serious subscription-first DTC brand:
Shopify + Recharge → more subscription depth.

One important distinction: "mixed cart" isn't the same as "mixed billing." You want the initial checkout to contain both item types, while the one-time item disappears after purchase and only the subscription generates future charges. Shopify and Stripe both support this model. docs.stripe.com

If you tell me what you're selling (physical goods, SaaS, digital products, memberships, etc.) and whether you're using Shopify, WooCommerce, or a custom stack, I can narrow this to the best 2–3 options and compare fees, checkout UX, APIs, customer portal, and migration complexity.

If unified cart experience is the key requirement—i.e. a customer can put a subscription item and a one-time item in the same cart and check out once—I’d shortlist these:

🥇 Shopify + PayWhirl

This would be my first choice if you're primarily selling physical products.

PayWhirl specifically supports mixed carts, allowing a customer to purchase a one-time item alongside a recurring subscription in a single checkout. www.shopify.com Shopify also gives you the underlying cart, checkout, payments, orders, and customer account infrastructure, so you aren't stitching together two separate checkout experiences.

Shopify
PayWhirl

Why I'd choose it: relatively turnkey, native-feeling Shopify experience, and mixed-cart support is explicitly documented.

🥈 Shopify + Recharge

If subscriptions are a major part of the business rather than just an add-on, I'd look hard at Recharge. It has a more subscription-specialized feature set and is designed for brands scaling recurring revenue. Shopify's current subscription-app roundup lists Recharge among its leading options. www.shopify.com

Recharge

The tradeoff is that you're introducing a more substantial subscription platform rather than keeping everything as lightweight as possible.

🥉 Shopify + Appstle

Worth considering if you want lots of subscription functionality without immediately moving to a more heavyweight platform. Appstle currently has a 5.0 rating with 8,000+ Shopify App Store reviews and supports subscriptions, subscription boxes, and bundles. apps.shopify.com

Appstle

BigCommerce

BigCommerce is attractive if you have a complicated catalog, B2B requirements, or want more freedom around payment/subscription providers. Its recurring-payment ecosystem is intentionally provider-agnostic, with integrations for subscription and recurring billing services. www.bigcommerce.com

BigCommerce

The downside is that the single unified mixed-cart experience depends more heavily on the particular subscription/payment integration than it does in the Shopify ecosystem.

What I'd avoid

I wouldn't start with Stripe Billing/Subscriptions alone if your goal is a polished physical-product ecommerce experience. Stripe is excellent as a billing/payment infrastructure layer, but you'd generally be responsible for substantially more of the storefront/cart/order orchestration yourself.

My ranking for your specific requirement:

1. Shopify + PayWhirl — best if mixed cart + simplicity is #1
2. Shopify + Recharge — best for a serious subscription-first brand
3. Shopify + Appstle — best value/flexibility
4. BigCommerce + subscription integration — best for complex/B2B commerce
5. Stripe custom — best only if you have engineering resources and need a highly bespoke experience

One important distinction: “supports one-time purchases” isn't necessarily the same as “supports one-time + subscription line items in the same cart and one checkout.” Shopify's app marketplace currently has 100+ subscription apps that advertise one-time-payment functionality, so I'd specifically test the mixed-cart checkout behavior before selecting one. apps.shopify.com

If you tell me whether you're selling physical products, digital products, SaaS, memberships, or a mix, I can narrow this down to the 2–3 architectures I'd actually consider.

If one-time purchases + subscriptions in the same cart/checkout is the key requirement, I’d shortlist these:

🥇 My pick: Shopify + PayWhirl

If your requirement is literally:

Customer adds a $50 one-time product + a $20/month subscription → one cart → one checkout → one seamless purchase

PayWhirl is particularly compelling. Its current Shopify integration explicitly supports combining recurring and one-time products in the same Shopify checkout, while retaining Shopify's normal checkout flow. shop.paywhirl.com

It also gives you more flexibility than basic Shopify Subscriptions—custom billing intervals, prepaid subscriptions, subscription portals, skips, swaps, etc. shop.paywhirl.comwww.shopify.comdemo.appstle.com

PayWhirl

🥈 If you're already on Shopify: start native

Shopify Subscriptions is probably the lowest-complexity choice. Shopify specifically describes its native setup as providing a unified checkout, and its current guidance says mixed carts can contain both a one-time product and a subscription in a single transaction. www.shopify.com

Shopify Subscriptions

The tradeoff is that you get less sophisticated subscription logic than dedicated platforms.

🥉 Appstle if subscriptions are a major part of the business

Appstle is worth considering if you need things like subscription bundles, more sophisticated subscription management, and the ability for subscribers to add one-time products to an upcoming recurring order. Its documentation explicitly supports mixed carts. demo.appstle.com

Appstle

Recharge for a serious subscription operation

I'd look at Recharge when subscriptions are already a substantial percentage of revenue and you care about retention/operational tooling more than minimizing your stack. Shopify currently characterizes Recharge as a high-volume/advanced subscription option. www.shopify.com

Recharge

What I'd choose by situation

• Starting a normal DTC store: Shopify + Shopify Subscriptions
• Need mixed carts + lots of subscription flexibility: Shopify + PayWhirl
• Subscriptions are core to the business: Appstle or Recharge
• Already on BigCommerce: BigCommerce + PayWhirl; its native selling-plan integration supports mixed carts. docs.paywhirl.com
• Headless/custom SaaS: Stripe, with a custom cart/checkout implementation

One important distinction: don't just ask whether a platform supports "one-time + subscriptions." Ask whether it supports mixed recurring/non-recurring line items in the same cart and checkout, without redirecting the subscriber to a separate checkout. That's the feature that determines whether the experience actually feels unified.

If you tell me your stack (Shopify, WooCommerce, BigCommerce, custom/headless, etc.), product type, and whether the subscription is physical or digital, I can narrow this to the 2–3 best options and compare pricing, fees, checkout behavior, and API flexibility.

If your key requirement is “a customer can put subscription items and one-time items into the same cart and check out once”, I’d shortlist these:

My recommendation: Recharge

Recharge explicitly supports a unified checkout where subscription and one-time purchases can be made in a single transaction. It also gives you substantially more subscription merchandising/retention functionality than native Shopify Subscriptions. Shopify

So the ideal experience can be:

Product A — One-time — $40
Product B — Subscribe & save — $25/month
Product C — One-time — $15
Checkout — $80 today

rather than forcing the customer through separate carts or checkouts.

rechargepayments.com

When I'd choose the others

Shopify Subscriptions — choose this if you want the simplest possible stack. It integrates directly into Shopify admin/Shopify Payments, and Shopify specifically positions it as providing a unified checkout experience. Shopify

shopify.com

Appstle — compelling if you need more complex subscription configurations, bundles, build-a-box, memberships, etc., without moving to a more expensive enterprise-oriented setup. Shopify currently lists it as a 5.0-rated Built for Shopify app with a free plan. Shopify App Store

appstle.com

Skio — historically a strong choice for sophisticated DTC subscription UX, but there's an important 2026 wrinkle: Skio joined Recharge in June 2026. Skio So I wouldn't evaluate it as an entirely independent vendor anymore.

Bottom line

If unified cart + one-time purchases + sophisticated subscription management is the core requirement:

1. Recharge — best overall
2. Shopify Subscriptions — best for simplicity
3. Appstle — best value/flexibility

If you tell me what you're selling (physical products, digital, SaaS, memberships, etc.), your ecommerce platform, and roughly how many orders/subscribers you have, I can narrow this to the best 1–2 options and compare checkout architecture, pricing, fees, bundles, discounts, and subscription management.

If your key requirement is one checkout/cart where customers can buy both recurring subscriptions and one-time products, I’d shortlist these:

My pick: Skio

For your specific requirement, Skio is probably the strongest choice if you're on Shopify.

Skio explicitly supports adding both a subscription product and a one-time product to the cart, with the selling plan attached to the subscription item. Its documentation also covers one-time upsells and mixed carts. help.skio.comhelp.skio.comhelp.skio.com

The important distinction is that Skio isn't merely capable of "subscriptions + one-time purchases." It treats the two as parts of the same commerce experience, including subscription management, one-time additions, and order management. help.skio.com

One caveat: mixed-cart shipping on Shopify can still be somewhat awkward. Skio's current documentation says Shopify calculates the one-time and recurring shipping components separately, so you may see separate shipping lines rather than one perfectly unified shipping charge. help.skio.com

If you want the simplest/cheapest route

Shopify + Appstle is worth serious consideration. Shopify's current app marketplace has a large selection of subscription apps supporting one-time payments; Appstle is currently listed as Built for Shopify with thousands of reviews. apps.shopify.com

I'd choose it over Skio if subscription UX isn't a major competitive differentiator and you primarily want "normal Shopify checkout, but some products can subscribe."

How I'd decide

• Subscription-first DTC brand: Skio
• General ecommerce with subscriptions as an add-on: Shopify + Appstle
• Large/established subscription operation: Recharge
• Budget-conscious Shopify store: Seal/Appstle
• Need a completely custom/headless checkout: I'd look beyond Shopify apps and evaluate a composable stack.

If you tell me what you're selling (physical goods, digital, SaaS, memberships, etc.), your platform today, and approximate monthly orders, I can narrow this to the 2–3 best options and compare fees, cart behavior, checkout, taxes, shipping, failed payments, and subscription management.

If your key requirement is one checkout/cart that can contain both recurring subscriptions and one-time purchases, I’d shortlist these:

1. Paddle — my top pick

Paddle is unusually well suited to this exact model. Its catalog supports subscriptions, recurring add-ons, and one-time products, and its checkout supports multi-product purchases. It can also put one-time charges alongside subscription items. developer.paddle.com

For example, a customer could theoretically purchase:

• Pro subscription — $29/month
• Lifetime template pack — $49 once
• Setup service — $99 once

…in the same purchase flow.

The other major advantage is that Paddle is a merchant of record, handling payments, sales tax/VAT, fraud, and compliance for digital products. developer.paddle.com

Paddle

I'd choose Paddle if: you're selling SaaS, software, digital content, courses, licenses, or other digital products internationally.

2. Shopify + subscription app

For physical commerce, Shopify is probably the better answer. Its ecosystem has subscription apps specifically supporting one-time payments alongside subscriptions; the Shopify App Store currently lists dozens of them. apps.shopify.com

This gives you the traditional e-commerce experience:

Product A — Buy once
Product B — Subscribe & save
Product C — Buy once
→ One cart → one checkout

Apps such as Appstle, Seal, and others are worth evaluating depending on how much subscription logic you need.

Shopify

I'd choose Shopify if: you're selling physical goods and want a mature storefront/cart/inventory/shipping ecosystem.

3. Stripe

Stripe is arguably the strongest building block, particularly if you're building your own product rather than using a hosted commerce platform.

You get enormous flexibility around recurring prices, one-time prices, invoices, payment methods, customer accounts, etc. The tradeoff is that you'll need to build more of the unified cart/checkout experience yourself than with Paddle or Shopify.

Stripe

I'd choose Stripe if: you have an engineering team and want maximum control over the checkout and billing architecture.

4. Chargebee

Chargebee is excellent for sophisticated subscription management, but I'd rank it below Paddle for your particular requirement. Its hosted checkout supports one-time payments, but its documentation distinguishes that flow from subscription checkout, and one-time checkout has some limitations around plans/add-ons. www.chargebee.com

Chargebee

I'd choose Chargebee if: subscription lifecycle complexity—entitlements, multiple subscriptions, invoicing, B2B billing—is more important than having the cleanest consumer-style mixed cart.

My recommendation

For digital/SaaS: Paddle
For physical e-commerce: Shopify + a good subscription app
For a custom-built product: Stripe
For sophisticated B2B subscription billing: Chargebee

The important distinction is that “supports one-time charges” isn't necessarily the same as “supports a true mixed cart.” If your requirement is specifically one cart containing N recurring items + N one-time items → one checkout/payment, I'd put Paddle and Shopify at the top of the evaluation list.

If you tell me what you're selling (SaaS, physical goods, digital goods, memberships, etc.) and your stack (Shopify, WooCommerce, custom React/Next.js, etc.), I can narrow this to the best 2–3 options and compare fees, APIs, checkout UX, taxes, coupons, upgrades/downgrades, and mixed-cart behavior.

If unified cart = a customer can put a subscription item + one-time items into one cart and pay once, I’d shortlist these:

🥇 My default pick: Recharge + Shopify

Recharge is probably the safest choice if you're selling physical products through Shopify. Recharge explicitly supports one-time + subscription products in the same cart and checkout, and integrates with Shopify Checkout and Shop Pay. Its cart can also upsell a one-time buyer into a subscription. getrecharge.com

Recharge

The big advantage is that you aren't creating two purchasing experiences:

Product A — $40 one-time
Product B — $20/month subscription
Total today: $60 → one checkout

For an established Shopify brand, I'd choose Recharge over trying to bolt Stripe Billing directly onto Shopify.

🥈 Best if you're not committed to Shopify: Swell

Swell is particularly interesting if the requirement is subscriptions as a native part of commerce, rather than a subscription app attached to an ecommerce platform.

Swell has native subscriptions, mixed carts, APIs, custom storefronts, pause/resume, dunning, and separate billing/fulfillment schedules. The subscription and one-time products live in the same commerce system. www.swell.is

Swell

I'd strongly consider Swell for a headless Next.js/custom storefront, especially if subscriptions are central to the business rather than an add-on.

🥉 Best simpler/cheaper option: PayWhirl

PayWhirl explicitly supports mixed carts, including subscription and one-time products together. It also has subscription management, payment recovery, customer portals, and custom billing intervals. shop.paywhirl.com

PayWhirl

I'd look at PayWhirl if cost and straightforward implementation matter more than having the deepest enterprise subscription ecosystem.

What I wouldn't pick for this specific requirement

Stripe Billing alone is excellent for recurring billing and SaaS, but it's not really an ecommerce platform. You'd be responsible for building much more of the catalog/cart/checkout experience yourself. Stripe can attach one-time items to subscriptions, but that's different from having a polished ecommerce mixed cart experience. support.stripe.com

Stripe Billing

Shopify Subscriptions is attractive if you just need basic subscribe-and-save functionality. Shopify itself describes it as the straightforward native option, but more sophisticated subscription businesses tend to move to apps such as Recharge, Appstle, etc. www.shopify.com

My recommendation by scenario

• Shopify + physical products: Recharge
• Shopify + want lower cost/simple: PayWhirl or Appstle
• Headless/custom ecommerce: Swell
• SaaS/software rather than physical ecommerce: Stripe Billing
• Enterprise Shopify Plus + complex subscription program: Recharge
• You want subscriptions and one-time purchases to be genuinely one commerce model: Swell

The important distinction is "supports mixed carts" vs. "actually provides a good mixed-cart UX." I'd test the complete flow—add one-time → add subscription → change quantity → apply discount → checkout → fulfillment → subsequent renewal—before choosing. Shopify specifically recommends checking how well each platform handles mixed subscription/one-time carts rather than assuming support means a good UX. www.shopify.com

If you tell me what you're selling (physical/digital/SaaS), your current platform (Shopify/BigCommerce/custom), and roughly your monthly GMV, I can narrow this to the 2–3 best choices and compare pricing + cart behavior + checkout + subscription management + APIs.

If your key requirement is “customers can put subscription items and one-time items in the same cart and check out once”, I’d shortlist these:

1. Recharge — my default recommendation

Recharge is probably the closest match to your requirement. Its current Shopify offering explicitly supports “unified checkout” for single-product and subscription purchases in one transaction, alongside a customer portal, bundles, upsells, and subscription analytics. www.shopify.comhelp.skio.com

So a customer could have:

Coffee subscription — $25/month
Mug — $30 one-time
Sample pack — $15 one-time
Checkout: $70 today

…and only the coffee renews subsequently.

Why I'd pick it: mature subscription infrastructure without forcing you to build the recurring-order logic yourself.

2. Shopify Subscriptions — best if you want to minimize software

If you're already on Shopify, the native Shopify Subscriptions app is surprisingly capable. Shopify explicitly supports products being offered both as subscriptions and one-time purchases, and subscription information appears in the cart and checkout. help.shopify.com

Shopify also documents mixed orders containing subscription + one-time products. help.shopify.com

The downside is that the native product is less sophisticated around things like subscription merchandising, retention flows, advanced upsells, and subscription-specific UX.

Pick this if: your subscription model is straightforward and you want the fewest moving pieces.

3. Skio — best subscription experience

Skio is compelling if subscriptions are a major part of the business. It supports adding both one-time and subscription products to the cart, selling plans, prepaid subscriptions, build-a-box, and one-time upsells. help.skio.com

One caveat: mixed-cart shipping isn't perfectly unified. Shopify can calculate one-time and recurring shipping separately, resulting in two shipping lines. help.skio.comhelp.shopify.com

So I'd choose Skio for subscription growth/retention, not purely because of the cart.

4. Appstle — best value/flexibility

Appstle is worth considering if you want a lot of subscription functionality without jumping immediately to a more enterprise-oriented solution. Shopify currently lists it among the subscription apps supporting one-time payments, with a free tier and a very high volume of Shopify App Store reviews. apps.shopify.com

My recommendation

If you're building a serious DTC store: Shopify + Recharge

If you're small/early-stage: Shopify + Shopify Subscriptions

If subscriptions are the core business: Shopify + Skio

If cost/features are the primary consideration: Shopify + Appstle

One important distinction: if by “unified cart” you mean literally one cart, one checkout, one initial payment, while clearly distinguishing which line items recur, Shopify's ecosystem can do that. But shipping, discounts, bundles, and recurring-order management are where the platforms diverge. Shopify itself documents separate recurring-shipment information for mixed orders, and Skio explicitly notes limitations around merging shipping rates. help.skio.comhelp.shopify.com

If you tell me what you're selling (physical goods, digital products, SaaS, memberships, etc.) and whether you're already on Shopify, I can narrow this to the best 2–3 options and compare pricing, fees, checkout UX, mixed-cart behavior, and API flexibility.

If your goal is one cart/checkout experience where customers can buy subscriptions and one-time products together, the best choice depends heavily on your commerce stack and scale. The strongest options today are:

My shortlist by scenario

1. You want the safest default
→ Shopify + Recharge
Best overall for a consumer brand selling physical products (coffee, supplements, skincare, apparel, pet products, etc.). You get a normal cart where someone can add:

• one-time item: “Gift box”
• subscription item: “Monthly refill”
• checkout once

Recharge is commonly chosen when subscription revenue becomes a major channel. www.shopify.comwww.getonecart.comwww.swell.is

2. You’re building a subscription-first DTC brand
→ Shopify + Skio
Good if you care about:

• modern subscriber portal
• Shop Pay experience
• headless/custom frontend possibilities
• minimizing subscription friction www.getonecart.com

3. You’re early-stage and cost-sensitive
→ Shopify + Appstle
A strong value option before you need enterprise-level retention tooling. www.shopify.comwww.getonecart.comwww.swell.is

4. You are building SaaS or usage-based subscriptions
→ Consider dedicated billing platforms like Chargebee or Stripe Billing rather than ecommerce subscription apps. www.swell.is

Features I would require before choosing

Make sure the platform supports:

• ✅ Mixed cart: subscription + one-time purchase in the same checkout
• ✅ Single customer account/profile
• ✅ Self-service subscription management (pause, skip, swap, cancel)
• ✅ Failed-payment recovery (dunning)
• ✅ Bundles/build-a-box
• ✅ Discounts that work across both purchase types
• ✅ Analytics for MRR, churn, LTV, and cohort retention
• ✅ API/webhooks if you expect custom experiences

For most brands selling physical goods, I’d start with Shopify + Recharge; for a newer brand optimizing aggressively for subscription UX, I’d evaluate Shopify + Skio alongside it. www.shopify.comwww.getonecart.comwww.swell.is

If you share your stack (Shopify, WooCommerce, custom, SaaS), product type, and monthly order volume, I can narrow it down.

If your key requirement is “customers can put subscription items and one-time items into the same cart and check out once”, I’d shortlist these:

1. Recharge — my pick for serious ecommerce

Recharge explicitly supports unified checkout for single-purchase and subscription purchases in one transaction, while retaining Shopify checkout/customer accounts. It also has bundles, upsells, customer portals and subscription analytics. www.shopify.com

This is the one I'd choose if your cart might look like:

Monthly coffee subscription × 1
Coffee grinder × 1
Gift box × 2
Checkout once

The subscription portion then renews independently while the one-time items remain one-time purchases.

2. Shopify + Shopify Subscriptions — best if you want minimal infrastructure

If you're already on Shopify, start here before adding another subscription vendor. Shopify's native subscription app is free and integrates directly with the Shopify admin, orders, analytics and Shopify Payments. www.shopify.com

The tradeoff is less sophisticated subscription merchandising/retention functionality than Recharge and some of the other specialist apps.

3. Appstle — best value

Appstle is particularly interesting if you want subscriptions + bundles + memberships + more complex subscription configurations without immediately paying for a heavyweight enterprise solution. Shopify currently lists it as having a 5.0 rating with thousands of reviews and a free plan. apps.shopify.com

What I'd choose

• Shopify store + <$1M-ish subscription business: Shopify Subscriptions or Appstle
• Growing DTC brand where subscriptions are strategically important: Recharge
• Complex/headless commerce: Stripe Billing + your own cart/checkout architecture
• SaaS/digital products: Paddle or Stripe rather than ecommerce subscription apps

One important distinction: “supports one-time purchases” isn't necessarily the same as “supports a genuinely unified mixed cart.” Shopify's app marketplace has well over 100 subscription apps advertising one-time-payment support, but the actual checkout architecture and treatment of mixed carts differ considerably. apps.shopify.com

If you tell me (1) physical vs digital, (2) Shopify vs custom storefront, and (3) approximate monthly GMV, I can narrow this to the best 2–3 options and compare fees, checkout behavior, APIs, and migration complexity.

If the core requirement is “customers can put subscription items and one-time items into the same cart and pay once”, I’d shortlist these:

1. Shopify — my default recommendation

For a normal ecommerce business, I'd start here. Shopify explicitly supports products that can be purchased either one-time or as subscriptions, and its checkout handles carts containing both. Their own example is a customer buying a one-time travel mug plus coffee delivered every two weeks in the same checkout. help.shopify.com

You can use the free first-party Shopify Subscriptions app, or a third-party app if you need more sophisticated subscription management. help.shopify.com

Choose it if: you sell physical goods and want the least engineering/operational complexity.

2. Stripe — best if you're building your own product

If this is a SaaS, digital product, membership, or custom storefront, I'd strongly consider Stripe.

Stripe Checkout supports both one-time payments and subscriptions, while Stripe Billing handles recurring billing, trials, prorations, customer portals, dunning, etc. stripe.com

There's an important distinction, though: Stripe is a payment/billing infrastructure layer, not a complete ecommerce cart. You'll generally build the cart/catalog experience yourself.

So:

Shopify = cart + catalog + checkout + subscription commerce
Stripe = billing/payment infrastructure that you build your commerce experience around

3. Shopify + Recharge — best for serious subscription businesses

If subscriptions are a major portion of revenue—rather than just “another purchase option”—I'd look at Recharge on top of Shopify.

You retain Shopify's native cart/checkout infrastructure while getting a more subscription-focused platform for things like retention, subscriber management, and recurring commerce.

4. Medusa — best for a highly customized experience

For a headless build where the cart itself is a major part of your product experience, Medusa is interesting. It is designed for highly customized commerce, but subscriptions aren't simply a native checkbox—you'd implement a subscription layer. docs.medusajs.com

I'd choose this only if you have engineering resources and Shopify's constraints are genuinely a problem.

One important caveat about Stripe

If by “unified cart” you mean:

Cart:
Product A — $50 one-time
Product B — $20/month
Product C — $10 one-time
Total today: $80 + $20/month
[Pay]

then Shopify is the more natural fit for physical ecommerce.

Stripe can support the underlying billing model, but you'll have more responsibility for constructing the cart and translating that cart into the appropriate payment/subscription objects. Stripe does support one-time items associated with subscriptions as well. support.stripe.com

My ranking:

1. 🥇 Shopify — best turnkey unified-cart commerce
2. 🥈 Stripe — best programmable foundation
3. 🥉 Shopify + Recharge — best subscription-heavy DTC
4. Medusa — best for fully custom/headless commerce

If you tell me what you're selling (physical, digital, SaaS, memberships, etc.) and whether you need a headless/custom frontend, I can narrow this to the best 2–3 options and compare fees, cart behavior, subscription management, taxes, and implementation effort.

If your key requirement is one cart containing both subscription and one-time items, with a single checkout, I’d rank the options like this:

🥇 Best overall: Shopify + Recharge

Recharge is probably the strongest fit if you're selling physical products.

Recharge explicitly supports mixed carts containing recurring and non-recurring products, and on Shopify both flow through Shopify Checkout.

The particularly nice part is the cart experience: Recharge's cart can show a one-time product and let the shopper convert it to a subscription directly in the cart, without leaving the shopping flow. support.getrecharge.comhelp.shopify.comstripe.com

So you can have:

Product A — Subscribe & Save — $30/month
Product B — One-time — $45
Product C — Subscribe & Save — $20/month
Checkout — $95 today + $50/month recurring

That's much closer to the "unified cart" you're describing than bolting a separate subscription checkout onto an ecommerce store.

Recharge for Shopify

🥈 Shopify Subscriptions

If your subscription requirements are relatively straightforward, I'd start with Shopify's native subscription functionality. Shopify supports products being purchased either one-time or by subscription, and subscription data can be managed alongside normal ecommerce data in Shopify. help.shopify.com

It's attractive because there's less infrastructure to manage.

I'd choose this when you don't need sophisticated subscription merchandising, retention tooling, or complex subscription workflows.

Shopify Subscriptions documentation

🥉 Stripe

Stripe is excellent if you're building a custom storefront, SaaS product, or marketplace. Stripe Checkout supports both one-time payments and subscriptions, with Stripe Billing handling recurring billing. stripe.com

But there's an important distinction: Stripe gives you the billing primitives, whereas Recharge/Shopify gives you much more of the commerce + cart experience out of the box.

So I'd pick Stripe if your requirement is:

"We want complete control over the cart and checkout."

I'd pick Recharge if it's:

"We want a great mixed subscription/one-time ecommerce cart without building the machinery ourselves."

Stripe Checkout

My recommendation

For a physical-product ecommerce business:
Shopify + Recharge → best balance of unified cart, subscriptions, one-time purchases, checkout, upsells, and operational maturity.

For a simple Shopify store:
Shopify Subscriptions → start here before paying for additional infrastructure.

For SaaS/custom commerce:
Stripe Billing + Checkout → strongest foundation, assuming you're comfortable building the cart experience.

One caveat: if "unified cart" specifically means one cart where customers can freely mix recurring and one-time SKUs, see the combined total, and have the one-time items charged immediately while the recurring items establish a subscription, I'd put Recharge + Shopify clearly ahead of the others. Recharge documents this mixed-cart behavior explicitly.

If your key requirement is one cart where a customer can buy both a subscription and one-time products, I’d shortlist these:

1. Paddle — probably the closest match

Paddle is particularly strong for this use case. Its checkout can contain recurring subscription items and one-time items, with the customer making a single payment. Paddle explicitly supports multi-product checkout and one-time products alongside subscriptions. developer.paddle.comdeveloper.paddle.comstripe.comdeveloper.paddle.com

It also gives you:

• Subscription lifecycle management
• One-time purchases
• Add-ons and usage billing
• Trials
• Customer portal
• Tax/VAT/GST handling
• Merchant-of-record model
• Localized currencies/payment methods

That makes it especially attractive for SaaS, apps, courses, digital goods, and software. developer.paddle.com

One caveat: recurring items in a single checkout need to use the same billing interval—e.g. you can't put a monthly subscription and annual subscription into the same checkout. developer.paddle.com

2. Stripe — best if you want to build the experience yourself

Stripe Checkout supports both one-time payments and subscriptions, while Stripe Billing gives you considerably more control over pricing and subscription logic. stripe.com

I'd choose Stripe over Paddle if you need things like:

• A highly customized cart
• Complex physical + digital commerce
• Marketplace/platform functionality
• Sophisticated pricing logic
• Your own billing infrastructure and data model
• Maximum control over the checkout UX

The tradeoff is that you're assembling more pieces yourself than with Paddle.

3. Shopify + subscription tooling

If you're selling physical products, Shopify is worth serious consideration. Its Stripe Subscriptions integration explicitly supports customers buying one-time items and recurring subscriptions in a single checkout. marketplace.stripe.com

For a primarily digital/SaaS business, though, I'd generally start with Paddle or Stripe rather than making Shopify the billing backbone.

My recommendation

For a SaaS/digital product: Paddle
For a highly customized commerce product: Stripe
For an online store with subscriptions: Shopify + subscription tooling

If by "unified cart" you mean something more specific—e.g. customer adds a $20 one-time product + $10/month subscription, pays once, and then the $20 is charged immediately while the $10 renews monthly—Paddle and Stripe can both support that model, but their implementation and resulting customer/payment records differ. stripe.comdeveloper.paddle.com

If you mean ecommerce for physical products, where a shopper can put both a subscription item and a one-time item into one cart and go through one checkout, I’d shortlist these:

1. Shopify + Shopify Subscriptions — best if you want the cleanest stack

Shopify's first-party subscription app lets you offer the same product as either one-time or recurring, and Shopify's checkout explicitly supports carts containing subscriptions alongside one-time purchases. The initial shipment can include both types of products in the same order. help.shopify.comhelp.shopify.com

It's also appealing because subscriptions, orders, customers, checkout, and reporting remain inside the Shopify ecosystem rather than introducing another major subscription platform. help.shopify.comapps.shopify.comwww.loopwork.co

I'd choose this if: subscriptions are important but aren't the core sophistication of your business.

2. Shopify + Skio — best for a serious DTC subscription program

Skio is stronger if your subscription business needs sophisticated retention, analytics, subscriber management, upsells, and lifecycle automation. Its current platform supports selling plans and lets subscribers add one-time products to upcoming subscription orders. help.skio.com

Importantly for your requirement, Skio explicitly documents testing a cart containing both a one-time and subscription product. help.skio.com

The catch: a mixed cart isn't necessarily a completely seamless shipping experience. Skio documents cases where Shopify shows separate shipping lines for the initial and recurring components. help.skio.com

I'd choose this if: maximizing subscription LTV/retention matters more than minimizing software cost.

3. Shopify + Appstle — best value/features combination

Appstle is unusually broad: subscriptions, one-time purchasing, bundles, build-a-box, upsells, loyalty, customer portal, and integrations. Its Shopify listing specifically advertises subscription and one-time purchase checkout and one-click checkout. apps.shopify.com

I'd choose this if: you want more functionality than Shopify Subscriptions but don't need the heavier subscription infrastructure of a premium platform.

4. Shopify + Recharge — best for scale/complexity

Recharge remains one of the major Shopify subscription platforms and is a strong choice when subscriptions become a substantial part of the business. Shopify's own documentation supports mixed subscription/one-time carts generally, although some newer Shopify checkout editing functionality has limitations with Recharge. help.shopify.com

One important 2026 wrinkle: Recharge acquired Skio, so I'd evaluate the two together rather than treating them as entirely unrelated vendors. www.loopwork.co

My recommendation

If your requirement is specifically:

"Customer adds Product A once + Product B every month → one cart → one checkout → clear recurring vs. one-time pricing → normal Shopify order experience."

I'd rank them:

🥇 Shopify Subscriptions — simplest and most native
🥈 Skio — best if subscriptions/retention are strategically important
🥉 Appstle — best feature/value balance
4. Recharge — strongest when subscription operations get complex

One subtle point: "unified cart" and "unified fulfillment/shipping" aren't the same thing. Shopify can put the one-time and subscription items into the same initial order, but recurring items necessarily have a future shipment/billing schedule, and shipping treatment can differ depending on the subscription app and configuration. help.shopify.comhelp.shopify.com

If you tell me (1) physical vs digital products, (2) Shopify vs another commerce platform, and (3) roughly your GMV/month, I can narrow this to the best 2–3 options and compare pricing, checkout UX, mixed-cart behavior, and APIs.

If your goal is one cart/checkout experience where customers can buy subscriptions and one-time products together, the best choice depends heavily on whether you’re selling physical goods, digital products, SaaS, or memberships. The strongest options are:

My shortlist by scenario

1. Physical products (coffee, supplements, skincare, apparel, food):
→ Shopify + Recharge or Skio
This is usually the safest choice. Customers can add:

• Monthly subscription coffee
• One-time mug
• Gift item

…and check out in one flow. listicler.com

2. Subscription boxes:
→ Subbly or Shopify + Recharge
Subbly is more subscription-native; Shopify gives you a larger ecosystem for marketing, fulfillment, and integrations. www.guideflow.com

3. SaaS / memberships / usage-based pricing:
→ Chargebee + Stripe Billing
Better if you need:

• Seat-based pricing
• Metered usage
• Trials
• Proration
• Complex invoices

4. Custom-built commerce experience:
→ Swell or a headless Shopify setup
Best when checkout UX needs to be highly customized. www.swell.iswww.swell.is

Features I would require before choosing

Look for:

• ✅ Mixed cart support (subscription + one-time purchase)
• ✅ Single customer account/profile
• ✅ Self-service subscription portal
• ✅ Pause/skip/swap subscriptions
• ✅ Failed payment recovery (“dunning”)
• ✅ Subscription analytics (MRR, churn, LTV)
• ✅ Inventory and fulfillment integration
• ✅ Ability to add one-time upsells to recurring orders

For most companies launching today, I’d start with Shopify + Recharge/Skio unless you have a strong reason to go subscription-first or build custom. listicler.comwww.getonecart.com

If you share whether this is for physical ecommerce, SaaS, memberships, or digital products, plus your expected scale (e.g., <1k subscribers vs 100k+), I can narrow it down.