ChatGPT answers, unedited

If you’re moving an existing mailing list into a paid newsletter, I’d prioritize two things:

1. How painless the subscriber import is
2. How much control you have over paid tiers, billing, and future growth

The best fits are usually:

www.beehiiv.com

My pick by situation

If you already have a decent subscriber base and want to turn it into a business:
→ beehiiv is probably the smoothest transition. It’s built around newsletter growth, imports, segmentation, paid subscriptions, referrals, and monetization tools. It also supports migrating paid subscriptions with Stripe workflows if you’re coming from another paid newsletter platform. beehiivhelp.zendesk.comsaascompared.com

If you want a “my publication, my website, my audience” setup:
→ Ghost is excellent. It gives you a publication site plus memberships and avoids a platform revenue cut, but you’ll spend more time configuring things. www.sasanova.com

If you want the absolute lowest friction:
→ Substack wins. Import your list, turn on paid subscriptions, and publish. The downside is that Substack takes a percentage of paid subscription revenue. tiergauge.com

Migration checklist (regardless of platform)

• Export your current subscribers as CSV
• Clean duplicates and invalid emails
• Decide your paid tiers (for example: Free / Premium monthly / Premium annual)
• Set up your payment processor (usually Stripe)
• Import subscribers before launching paid access
• Send a “we’re upgrading” email before switching
• Keep your old list backed up

One important distinction: migrating free subscribers is usually easy; migrating existing paid subscribers is the tricky part because payment credentials and recurring billing often need special handling. beehiivhelp.zendesk.comsaascompared.com

If you tell me:

• your current platform (Mailchimp, Constant Contact, ConvertKit, etc.)
• subscriber count
• whether you already have paying readers
• whether you want a website/archive or just email

…I can narrow it to the best migration path.

If you're moving from a basic/free mailing list to a paid newsletter, I'd narrow it to beehiiv vs. Substack vs. Kit.

My pick: beehiiv

For your specific situation, beehiiv is probably the easiest overall migration if you expect the newsletter to become a real paid business.

• Subscriber migration: straightforward CSV import.
• Paid tiers: you can create multiple paid tiers and map existing Stripe products directly to them.
• Existing paid subscribers: beehiiv has a dedicated paid-subscription migration tool that preserves subscribers' current prices and billing schedules. Beehiiv Beehiiv
• Growth: strong newsletter-specific tools if you eventually want referrals, recommendations, ads, or other acquisition channels.
• Downside: some of the more useful migration/paid features require a paid beehiiv plan.

beehiiv.com

When I'd choose the others

Substack — easiest if you want maximum simplicity.

You can upload your existing subscriber CSV, create paid plans through Stripe, and assign imported readers paid access/“comp” periods. Substack Support

The tradeoff is less control over the business/marketing infrastructure than beehiiv. It's excellent if your priority is essentially “publish newsletter → let readers subscribe → get paid.”

substack.com

Kit — best if your newsletter is becoming part of a broader creator business.

Kit supports subscriber imports, paid subscriptions, automation, digital products, and segmentation. Kit Help Center However, there's an important migration caveat: Kit currently cannot conveniently transfer existing paid subscriptions/payment details from Substack; those subscribers generally have to cancel and resubscribe. Kit Help Center

kit.com

Quick decision

One important distinction: if you currently have only free subscribers, the migration is easy on all three. If you already have paying subscribers whose existing payment subscriptions need to move without making them resubscribe, the choice becomes much more important.

If you tell me what platform your current mailing list is on (Mailchimp, MailerLite, ConvertKit/Kit, etc.), your subscriber count, and whether you already have paying subscribers, I can give you a more specific recommendation and migration path.

If easy migration + easy paid tiers are your top priorities, I’d put beehiiv at the top of the list.

My ranking

🥇 beehiiv — easiest overall

beehiiv.com is particularly strong if you're starting with a free mailing list and introducing paid subscriptions.

You can import your existing subscribers, create multiple paid tiers, and connect Stripe. Paid tiers can have different prices, benefits, billing periods, trials, discounts, and paywalls. beehiiv currently supports up to five tiers per publication. Beehiiv Beehiiv

More importantly, its migration tooling is unusually mature. If you already have paid subscribers elsewhere, beehiiv can migrate Stripe subscriptions and preserve their existing prices—so you can grandfather existing customers while putting new customers into your new pricing structure. Beehiiv Beehiiv

I'd choose it if: you want something that feels like a conventional newsletter platform but gives you room to build a real subscription business.

🥈 Substack — simplest if you don't need much customization

substack.com is probably the lowest-friction option conceptually: import your list, turn on paid subscriptions, choose your pricing, and publish.

The tradeoff is less control over the business and a 10% platform fee on paid subscription revenue, whereas beehiiv advertises no platform fee (Stripe processing still applies). TierGauge Beehiiv

I'd choose it if: your priority is "I want this live with as little setup as possible" rather than maximizing control or monetization flexibility.

🥉 Ghost — best if owning the whole publishing operation matters

ghost.org is excellent for memberships and paid newsletters, but I'd consider it more of a publishing website/CMS than a simple mailing-list migration tool. It's attractive if you want your newsletter, website, memberships, and content archive to feel like one owned publication.

I'd choose it if: you're building a publication/brand rather than just adding paid subscriptions to an email list.

My recommendation

For your specific transition, I'd go:

Existing free list → beehiiv → Free tier + 1–2 paid tiers → Stripe

I'd resist launching five different tiers immediately. Something like:

• Free — regular newsletter
• Premium — full newsletter + archives
• Premium+ — premium + bonus material/community/access

That gives you a straightforward upgrade path without making the pricing page confusing.

One important caveat: beehiiv's paid subscriptions are available on paid plans, so factor the subscription-platform cost into the decision rather than looking only at the transaction fee. Beehiiv Beehiiv

If you tell me roughly how many subscribers you have (e.g. 2k, 20k, 100k) and what you want to charge, I can compare the actual economics of beehiiv vs. Substack vs. Ghost for your situation.

More importantly, its migration tooling is unusually mature. If you already have paid subscribers elsewhere, beehiiv can migrate Stripe subscriptions and preserve their existing prices—so you can grandfather existing customers while putting new customers into your new pricing structure. Beehiiv Beehiiv

I'd choose it if: you want something that feels like a conventional newsletter platform but gives you room to build a real subscription business.

🥈 Substack — simplest if you don't need much customization

substack.com is probably the lowest-friction option conceptually: import your list, turn on paid subscriptions, choose your pricing, and publish.

The tradeoff is less control over the business and a 10% platform fee on paid subscription revenue, whereas beehiiv advertises no platform fee (Stripe processing still applies). tiergauge.com Beehiiv

I'd choose it if: your priority is "I want this live with as little setup as possible" rather than maximizing control or monetization flexibility.

🥉 Ghost — best if owning the whole publishing operation matters

If your main goal is “move my existing list with as little pain as possible, then introduce paid tiers,” I’d shortlist three platforms: beehiiv, Substack, and Kit.

My pick: beehiiv

beehiiv is probably the best fit if you're deliberately turning an existing mailing list into a paid newsletter. Its current migration tooling can import subscribers and, importantly, migrate existing Stripe-paid subscriptions while preserving subscribers’ current prices and billing schedules. You can also map existing Stripe products directly to new beehiiv paid tiers. www.beehiiv.com

That makes it particularly attractive if you already have paying customers or expect multiple tiers.

beehiiv

How I'd rank them

Substack is the easiest if you want the fewest moving parts. You can import a CSV, enable Stripe, and create monthly/yearly/founding-member plans. support.substack.com The tradeoff is cost: Substack takes 10% of paid subscription revenue, in addition to Stripe fees. support.substack.com

Substack

Kit is appealing if your newsletter is part of a broader creator business. It has straightforward CSV importing and dedicated importers for several email platforms, and its paid newsletter product supports recurring subscriptions. help.kit.com However, there's a big migration caveat: Kit currently can't conveniently transfer the actual payment subscriptions/payment details from another platform. Existing paid readers generally have to resubscribe. help.kit.comwww.beehiiv.com

Kit

Ghost is excellent if you want your newsletter to become a full-fledged publication/site. It can import members via CSV and supports Stripe customer IDs for bringing over existing paid subscribers. It also takes no transaction commission itself. ghost.org But it's more hands-on than beehiiv or Substack.

Ghost

Bottom line

I'd choose:

• beehiiv → best overall for list → paid newsletter + multiple tiers
• Substack → best for “I want this live tonight with almost no technical work”
• Kit → best if you're also building courses, products, automations, or a creator business
• Ghost → best if the website/publication itself matters as much as the email

One important distinction: if you currently have only free subscribers, migration is easy on essentially all four. The really important question is whether you already have paying subscribers whose recurring billing you need to preserve. That's where beehiiv has a substantial advantage over Kit right now. help.kit.comwww.beehiiv.com

If you tell me what platform your current mailing list is on, roughly how many subscribers you have, and whether they're currently free or paid, I can narrow this down to the easiest/cheapest migration for your specific situation.

If your priority is “move my existing list with minimal pain, then add paid tiers quickly,” I’d shortlist these three:

My pick: beehiiv

For your specific transition, beehiiv is probably the best balance. It supports multiple paid tiers, monthly/quarterly/annual billing, paywalls, trials/discounts, and Stripe payments. www.beehiiv.com

It's particularly attractive if you want a structure like:

• Free — regular newsletter
• Supporter — $5/mo — premium newsletter
• Pro — $12/mo — premium + bonus content

You can create multiple tiers and specify different benefits and pricing for each. www.beehiiv.com

beehiiv

Kit is the easiest migration choice

If migration itself is your biggest concern, I'd give Kit the edge. It has dedicated importers for several major email platforms, plus CSV import, and it explicitly offers free migration assistance on paid plans. help.kit.com

Its paid newsletter setup is also straightforward: create a subscription product, choose monthly/quarterly/yearly pricing, and attach the newsletter as the fulfillment. help.kit.com

Kit

Ghost if you want a publication, not just an email newsletter

Ghost is compelling if you want the newsletter to become a substantial website/publication. It supports multiple membership tiers with separate prices, benefits and content access, plus CSV member import/export. ghost.org

Ghost

Bottom line:

• Fastest path from mailing list → paid newsletter: beehiiv
• Least-friction subscriber migration + creator tools: Kit
• Most publication/site-oriented: Ghost

If you tell me what platform your current mailing list is on (Mailchimp, MailerLite, ConvertKit, etc.) and roughly how many subscribers you have, I can tell you which migration will be easiest and what you'll actually need to export/import.

If your main goal is “move my existing list with as little pain as possible, then introduce paid tiers,” I’d shortlist three:

My pick: beehiiv

For your particular transition, beehiiv looks like the smoothest fit.

Its subscriber import tools handle normal CSV imports, while its paid-subscription migration can transfer existing Stripe customers and map their existing products directly to beehiiv tiers. Existing subscribers can retain their current pricing, so you can grandfather early supporters rather than forcing everyone onto your new price. www.beehiiv.com

beehiiv

Why I'd choose it:

• Import your existing email list.
• Create multiple paid tiers.
• If you already have Stripe-based paid subscriptions, there's a dedicated migration workflow.
• Existing paid subscribers can keep their legacy price.
• Built specifically around newsletter growth and monetization.

Kit is a strong second choice

Kit makes importing a basic subscriber list very straightforward, and paid newsletters support monthly, quarterly, and annual pricing. help.kit.com

Kit

The catch is important: Kit currently can't conveniently transfer existing paid subscriptions/payment details from another platform. If you're starting with a free mailing list and asking those readers to become paid subscribers, that's fine. If you're already charging people elsewhere, it's considerably less convenient. help.kit.com

Ghost if you want a publication, not just a newsletter

Ghost is excellent if you want the newsletter to become a proper website/publication with members, gated articles, and multiple membership levels. Ghost supports importing members via CSV and offers multiple paid tiers through Stripe. ghost.org

Ghost

It's more flexible than beehiiv, but I'd expect more setup work.

Bottom line

If your current list is entirely free:
→ beehiiv or Kit. I'd lean beehiiv if paid tiers are the central business model.

If you already have paying subscribers:
→ beehiiv, especially if they're billed through Stripe. Its migration tooling is specifically designed for this scenario. www.beehiiv.com

If you're building a publication with a website + gated content + newsletter:
→ Ghost.

If you tell me roughly how many subscribers you have (e.g. 2k/20k/100k), whether they're currently free or paid, and what tiers you're considering, I can narrow it down to the cheapest/easiest option and flag any migration gotchas.

If your priority is the easiest migration + painless paid tiers, I’d shortlist beehiiv, Kit, and Ghost—with beehiiv as my default pick.

🥇 My pick: beehiiv

beehiiv is particularly strong if you're moving an existing list into a paid model.

• You can import your existing subscribers.
• It has built-in paid subscription tiers.
• If you're migrating existing paid subscribers, beehiiv has a dedicated Stripe migration flow that can transfer active subscriptions while preserving subscribers' current prices. www.beehiiv.com
• It also has specific tooling for migrating from Substack, including paid tiers and paid subscriber mapping. www.beehiiv.com

Important distinction: if you're currently just running a free mailing list and haven't started charging anyone yet, the migration is even simpler—you mainly import your list, create your free/paid tiers, and start directing new signups to the paid offer.

🥈 Kit — easiest if you're a creator

Kit is excellent if you want more sophisticated email automation, segmentation, funnels, and creator-business features alongside the newsletter.

Kit lets you import subscribers and create recurring subscription products. It even offers free migration assistance on paid plans. help.kit.com

The catch: if you already have paying subscribers, Kit's migration is less convenient. Its current Substack migration documentation says there isn't a way to transfer the existing payment details, so paid subscribers would need to cancel and resubscribe. help.kit.com

So I'd choose Kit if you're starting paid subscriptions from scratch, not if you're already charging people elsewhere.

🥉 Ghost — best if the newsletter is becoming a publication

Ghost is compelling if you want a full publication website rather than primarily an email-marketing platform.

It supports importing subscribers and can associate existing Stripe customer IDs with imported members, including paid subscribers. ghost.org

I'd choose Ghost if you care about your own publication/site, memberships, SEO, and long-term ownership more than having the slickest newsletter-growth tooling.

What I'd do in your situation

If you're currently:

basic mailing list → paid newsletter

I'd go:

beehiiv → import list → create Free + Paid tiers → connect Stripe → segment existing subscribers → announce paid upgrade.

If you tell me what platform you're currently using, roughly how many subscribers you have, and whether you already have paying subscribers, I can tell you which migration will be least painful and what the actual migration steps look like.

If your main goal is “move my existing subscribers over with the least pain and start charging”, I’d narrow it to three platforms:

tiergauge.com

My recommendation by situation

1. You already have a decent email list and want to monetize seriously → beehiiv

• Importing a subscriber CSV is straightforward.
• It has built-in paid subscriptions, audience segmentation, analytics, referrals, and growth tools.
• It avoids the ongoing percentage cut that Substack takes from paid subscription revenue. www.beehiiv.com
• It’s probably the best “business newsletter” choice if you expect this to become a revenue stream.

2. You want the absolute easiest switch → Substack

• Fastest setup: import contacts, create a publication, turn on paid subscriptions.
• Great if you’re primarily a writer and don’t want to manage marketing infrastructure.
• The tradeoff is that Substack takes a percentage of paid subscription revenue, though it provides discovery features that can help some writers grow. tiergauge.comwww.sasanova.com

3. You want a newsletter + website you fully control → Ghost

• Excellent if your newsletter is becoming a publication, membership site, or brand.
• Paid memberships are built in and it has strong ownership/control options.
• More setup than Substack or beehiiv. ghost.org

Migration checklist (regardless of platform)

1. Export your current subscribers as CSV.
2. Clean the list (remove bounced/unengaged contacts if needed).
3. Import subscribers.
4. Recreate your segments/tags.
5. Create paid tiers (for example: Free, Premium monthly, Premium annual).
6. Send a “we’re moving” email before the first paid issue.
7. Keep your old mailing system active briefly so you don’t lose stragglers.

One important detail: moving free subscribers is easy; moving existing paid subscribers is the tricky part because payment credentials and billing relationships involve Stripe/payment systems. Platforms like beehiiv have migration workflows for paid subscribers, but you’ll want to follow the exact steps to avoid double billing. beehiivhelp.zendesk.com

If you tell me:

• current platform (Mailchimp, ConvertKit/Kit, MailerLite, etc.)
• subscriber count
• whether you already have paying readers
• whether you want a simple newsletter or a media business

…I can recommend the least painful path.

If your starting point is a basic mailing list and your priorities are easy subscriber migration + paid tiers, I’d shortlist Kit, beehiiv, and Substack.

My pick: Kit

Kit is probably the easiest overall transition if you’re coming from a conventional email platform rather than an existing paid publication.

• It can import subscribers via CSV and has dedicated importers for platforms such as Mailchimp, ActiveCampaign, Beehiiv, and others. help.kit.com
• More importantly, Kit offers free migration assistance on paid plans—they'll move subscribers, tags, lists, and segments for you. kit.com
• Paid newsletters are set up as subscription products, with monthly, quarterly, and annual pricing, and you can create multiple pricing plans. help.kit.com
• Its free plan can process paid subscriptions at 3.5% + $0.30 per transaction. kit.com

Best if paid newsletters are the core business: beehiiv

I'd choose beehiiv if you're expecting the newsletter itself to become a substantial media/business operation.

It has particularly good paid-subscription migration tooling: its current system can migrate active Stripe subscriptions and map them to your new beehiiv tiers, including preserving existing subscriber pricing. www.beehiiv.com

It also supports multiple paid tiers, paywalls, and customized payment options, and says it takes no platform fee on paid subscriptions. www.beehiiv.com

So:

Easy migration → Kit
Best newsletter-growth/monetization platform → beehiiv

Simplest possible paid-newsletter experience: Substack

If you want to minimize setup and don't care as much about owning/customizing the underlying newsletter business, Substack is the simplest.

You connect Stripe and set monthly, yearly, and founding-member prices directly in the publication settings. support.substack.com

The catch is migration of already-paid subscribers: Substack's current process generally involves importing the list and giving existing paid members complimentary access for the appropriate period, rather than seamlessly transferring their active billing subscriptions. kit.comwww.beehiiv.comsupport.substack.comghost.org

What I'd do in your situation

Ghost is powerful but I'd consider it overkill if your main goal is simply turning an existing mailing list into a paid newsletter. It does support CSV member imports and Stripe customer IDs for existing paid subscribers, but there's more infrastructure to configure. ghost.org

Bottom line: I'd start with Kit if you want the least painful migration. I'd pick beehiiv if you already know you're building a larger paid-media business and want more sophisticated newsletter monetization/growth tools.

If you tell me what you're using now (Mailchimp, MailerLite, ConvertKit, etc.), roughly how many subscribers you have, and how many paid tiers you want, I can tell you which one is the cleanest migration specifically for your setup.

If your priority is “get my existing list over with minimal friction, then turn on paid tiers”, I’d shortlist beehiiv, Substack, and Ghost.

My pick: beehiiv

beehiiv is probably the best fit if you're starting with a basic/free mailing list and want a more sophisticated paid-newsletter business.

• Subscriber migration: You can import your existing list, and beehiiv has specific migration tooling for moving newsletters from other platforms. www.beehiiv.com
• Paid tiers: It supports multiple paid tiers with different prices, benefits, and access levels. www.beehiiv.com
• Paywalls: You can make entire posts paid or put paywall breaks inside otherwise-free posts. www.beehiiv.com
• Future-proofing: If you eventually have paying subscribers elsewhere, beehiiv has a Stripe migration tool designed to preserve ongoing billing rather than making everyone resubscribe. www.beehiiv.com

How I'd choose

Substack is the easiest conceptual transition if you just want “my mailing list, but paid.” It has a straightforward import process and lets you set monthly, yearly, and founding-member pricing. support.substack.com The downside is that its tiering is less flexible than beehiiv/Ghost.

Ghost is excellent if you want the newsletter to become a full publication/site. It supports multiple membership tiers with separate prices, benefits, and content access, and its member importer can even associate existing paid subscribers with Stripe customer IDs. ghost.org

Kit is attractive if the newsletter is part of a larger creator business—courses, digital products, automations, etc. It supports recurring paid newsletter products and multiple billing intervals. help.kit.com However, paid-subscription migration is its weak point: Kit currently says it cannot conveniently migrate existing paid subscriptions with their payment details. help.kit.com

Bottom line:

• Starting with a free/basic list → beehiiv
• Want the absolute simplest paid newsletter → Substack
• Want a publication + membership website → Ghost
• Want newsletter + creator-product ecosystem → Kit

If you tell me roughly how many subscribers you have and whether you want 1 paid tier or several, I can narrow this to the best choice and outline the migration path.

If your main goal is “I already have subscribers and want the easiest move into paid tiers”, I’d narrow it to three:

www.beehiiv.com

My default recommendation

Pick beehiiv if you’re treating this like a newsletter business.
It’s probably the smoothest upgrade path from a basic mailing list because it combines:

• subscriber import tools
• paid subscriptions
• segmentation
• referral/growth features
• analytics geared toward newsletter operators

It’s especially attractive if you expect to add sponsorships, referrals, or multiple revenue streams later. www.beehiiv.com

Pick Ghost if you want a “publication you own”

Ghost is better if your newsletter is really becoming a website + membership product:

• custom site experience
• free vs paid member tiers
• more control over branding
• no platform percentage cut on paid subscriptions (you still pay payment processing). www.sasanova.com

Pick Substack if speed matters more than optimization

Substack is the easiest “flip the switch” option:

• import your list
• enable paid subscriptions
• start charging

The tradeoff is that Substack takes a percentage of paid subscription revenue, though you get its built-in reader network and discovery features. www.sasanova.com

Migration checklist (regardless of platform)

Before switching:

1. Export your current subscriber list (CSV).
2. Clean duplicates and remove obvious invalid emails.
3. Tag subscribers if you know anything useful (customers, prospects, VIPs, interests).
4. Set up your paid tiers before announcing the move.
5. Send a transition email explaining:
   • what’s changing
   • what free readers still get
   • what paid members receive
   • how to update payment details if needed

One question changes the recommendation quite a bit: how big is your current list (e.g., 500, 5k, 50k subscribers), and are you already using a tool like Mailchimp, ConvertKit/Kit, or just a basic email list?

If your priorities are easy subscriber migration + painless paid tiers, I’d shortlist Substack, Ghost, and beehiiv.

My pick: Substack

For a basic mailing list that you're turning into a paid newsletter, Substack is probably the lowest-friction migration. You can upload your existing subscribers via CSV, assign their subscription type, and import newsletter archives from platforms including Mailchimp, Ghost, Beehiiv, WordPress, and others. support.substack.com

Setting up payments is also very simple: connect Stripe, choose monthly/yearly pricing, and enable payments. Substack supports monthly, yearly, and founding-member plans. support.substack.com

The big caveat: if you're starting with only a free mailing list, Substack is especially straightforward. If you already have paying subscribers somewhere else, migration can involve giving them complimentary access and having them re-enter payment details, depending on the source platform. support.substack.com

If you want several paid tiers: Ghost

I'd choose Ghost if your model is something like:

• Free
• $10/month — premium newsletter
• $25/month — premium + bonus content
• $100/year — supporter/founding tier

Ghost lets you create multiple membership products, each with its own price, benefits, and content-access level. ghost.org It also supports CSV subscriber imports, including fields for existing Stripe customers, which can make more sophisticated migrations cleaner. support.substack.comghost.org

The tradeoff is that Ghost feels more like building your own publication/site, whereas Substack feels like turning on paid subscriptions for a newsletter.

Where beehiiv fits

beehiiv is worth considering if you're thinking beyond subscriptions into newsletter growth, audience segmentation, referrals, and monetization. Its migration tooling supports CSV imports and field/tag mapping, and it has documented migration paths from other newsletter platforms. www.beehiiv.com

But I'd put it behind Substack for your specific requirement of "I have a basic list and want to get paid quickly."

Bottom line:

• Fastest/easiest transition: Substack
• Best for sophisticated multiple tiers: Ghost
• Best if newsletter growth is the bigger long-term business: beehiiv

If you tell me what your current mailing-list platform is (Mailchimp, MailerLite, ConvertKit/Kit, Constant Contact, etc.) and roughly how many subscribers you have, I can tell you which migration will be least painful and what you'll need to do with your existing subscriber data.

If your priority is the easiest migration from a basic mailing list + simple setup of paid tiers, I’d shortlist these:

My recommendation by situation

Pick beehiiv if you already have an audience and want to turn this into a business.
It’s probably the smoothest “old email list → paid newsletter” upgrade path. You can import subscribers, create paid tiers, and add growth tools like referrals and monetization options. www.beehiiv.com

Pick Substack if you want the least friction possible.
You can get a paid newsletter running quickly, and the built-in discovery network can help some writers grow. The downside is the ongoing 10% platform fee on paid subscriptions. www.beehiiv.comwww.sasanova.com

Pick Ghost if you think of this as building a media brand/site.
It gives you more ownership and customization, with paid memberships and no platform revenue cut, but it involves more setup choices. ghost.org

A practical migration path

1. Export your current mailing list as CSV.
2. Clean it first:
   • remove bounced addresses
   • remove obvious duplicates
   • tag engaged readers if your current tool supports it
3. Import subscribers into the new platform.
4. Create your paid tiers before announcing the change.
5. Email subscribers explaining:
   • what stays free
   • what becomes paid
   • founding-member pricing (if you want early supporters)
   • how billing works

One important distinction: moving free subscribers is easy; moving existing paid subscribers is the tricky part because payment subscriptions involve Stripe/payment records and may require mapping tiers carefully. beehiivhelp.zendesk.com

If you tell me:

• your current platform (Mailchimp, ConvertKit, MailerLite, etc.)
• subscriber count
• whether you already have paying readers
• whether you want a blog/site attached

…I can narrow it down to the best fit.

If your priority is “move my existing list with as little pain as possible, then add paid tiers,” I’d pick beehiiv.

Here’s how I’d rank the main options:

🥇 beehiiv — my recommendation

beehiiv is particularly attractive for your situation because it supports multiple paid tiers, monthly/yearly pricing, paywalls, trials and discounts. www.beehiiv.com

More importantly, its current migration tooling can migrate existing paid subscriptions from Stripe, rather than making every paying subscriber manually resubscribe. It can preserve their existing pricing and avoid double-billing during the transition. www.beehiiv.com

That's a big advantage if you're moving from a basic email provider and want to turn the list into something like:

• Free — weekly newsletter
• Premium — $8/month or $80/year
• Founding/Pro — $20/month or $200/year + extras

It also doesn't take a percentage of subscription revenue; you pay the normal Stripe processing costs. www.beehiiv.com

See beehiiv's paid-subscription features

🥈 Substack — easiest if you want maximum simplicity

Substack is probably the least technical option. You can import your existing subscribers via CSV and designate subscription types after enabling payments. support.substack.com

I'd choose it if you care more about getting launched quickly than having sophisticated control over your business.

The tradeoff is that you're buying into Substack's ecosystem and business model rather than having as much control as beehiiv/Ghost.

🥉 Kit — good if the newsletter is part of a larger creator business

Kit makes paid newsletters straightforward: create a subscription product, choose monthly/quarterly/yearly pricing, and use subscriber filters to deliver paid broadcasts. www.beehiiv.comwww.beehiiv.comhelp.kit.com

I'd favor Kit if you expect to eventually sell courses, digital products, sponsorships, or other creator products alongside the newsletter.

Ghost — best if you want your own publication

Ghost has excellent membership/subscription functionality and supports CSV member imports, including fields that can connect existing Stripe customers to paid memberships. ghost.org

It's more powerful, but I'd consider it less “easy migration” and more “build your own publication platform.”

My short answer:
beehiiv if you're serious about paid newsletter tiers and growth; Substack if you want the absolute simplest transition; Kit if the newsletter will become part of a broader creator business.

If you tell me what your current mailing-list platform is and roughly how many subscribers you have, I can tell you which migration will be easiest specifically for your situation (including what happens to existing subscriber tags, automations, and unsubscribe status).