Mailchimp alternatives: who each one is really for

If you ask ten founders what Mailchimp alternative they'd pick, you'll get ten different answers, and most of them will be right — for the specific business each founder is running. The category looks homogeneous in a feature grid, but the products were built for different customers, and pretending they're interchangeable is how teams end up migrating twice.

Here's the breakdown by who each tool is actually for, with no pretending that any of them is "the best ESP." The best ESP depends on what you're sending and to whom.

If you're a writer with a paid newsletter: Beehiiv or Substack

These are the two tools that built their products specifically for the "I publish words, some people pay" use case. The bundled distribution surface — referral programs, paid recommendations, audience swaps, a feed — is the actual reason to pick them, not the email engine.

Substack wins if you're starting cold and want the network effect. The 10% revenue cut on paid subscriptions is meaningful at scale but invisible until you're past $20–30k ARR. The Notes feed is essentially a Twitter replacement for the writer crowd, and discovery from other Substacks is a real growth channel.

Beehiiv wins if you have any audience already or plan to grow via paid acquisition. The product was built by ex-Morning Brew operators and ships built-in tools (referral programs, ad network, audience swaps) that Substack treats as separate concerns. No revenue cut on subscriptions. Pricing is per-subscriber on a normal SaaS curve.

The decision rule: cold start with no audience → Substack. Anything else → Beehiiv.

If you're a creator selling courses, books, or memberships: ConvertKit (Kit)

ConvertKit — now branded as Kit — was built from day one for "creators who teach and sell." The tag-based segmentation, visual automation flows, native commerce, and free tier up to 10k subscribers are all in service of that thesis. If you have a course on Teachable, a book on Gumroad, or memberships on Patreon, ConvertKit is probably the right ESP. The list-based tools (Mailchimp, MailerLite) treat the same operations as multi-step procedures.

The trade-off: ConvertKit's UI takes a week to internalise if you're coming from a list-based mental model. Once you adopt the tag-based way of thinking, it's faster than anything else. Until then, it feels weird.

If you're an e-commerce store past $500k GMV: Klaviyo

There's no real argument here. Klaviyo is the standard for Shopify and BigCommerce stores past a certain size, and the data model — every customer event becomes a queryable property — is genuinely a different category from list-based tools. The pricing is brutal for smaller stores and totally reasonable once your average order value supports it.

If you're under $500k in GMV, you don't need Klaviyo. Shopify Email or Mailchimp will do everything you actually use. Past it, the behavioural triggers (browse abandonment, replenishment, post-purchase) start paying for themselves.

If you're an indie SaaS doing lifecycle + transactional in one tool: Loops

Loops is the newer entrant that bet on "marketing email + transactional email in one tool, designed for SaaS" and built the product to match. The UX is closer to Linear than Mailchimp — clean, opinionated, fast — and the free tier (1k contacts) covers solo founders pre-PMF. If you're a developer-led SaaS sending welcome sequences, onboarding flows, and product updates from the same place as your password resets, this is the right answer.

The trade-off: smaller team, narrower integration ecosystem, and the playbook isn't as battle-tested as ConvertKit's.

If you want the cheapest reliable option: EmailOctopus or Buttondown

EmailOctopus runs on Amazon SES under the hood and prices accordingly — significantly cheaper than Mailchimp at every tier. The product is competent and the team is responsive. Choose this if you want a list-based ESP that does the job and bills you fairly.

Buttondown is bootstrapped by Justin Duke and is the right answer for solo technical writers who want a fair-priced, Markdown-friendly, no-frills ESP. Free tier up to 100 subscribers, paid from $9/mo, no tricks. The product surface is intentionally narrow — if you want automations, A/B tests, and behavioural triggers, this is not the right tool. If you want to write and send, it's perfect.

If you're an established business deep in the Mailchimp stack: Stay

This is the unpopular advice. If you've been on Mailchimp for five years, your team knows the UI, your integrations are working, and you're past 10k contacts — the migration cost is probably higher than the rate savings. Mailchimp's product is fine. The pricing is steep but not absurd. Switching for the sake of switching is rarely worth it.

The cases where Mailchimp is the wrong answer despite being established:

• You're paying for tier features (Advanced Segmentation, Predictive Analytics) you're not actually using
• Your unsubscribed contacts count against your tier and the bill is creeping
• You're moving toward behavioural automation and the visual flow builder feels limiting

If none of those apply: stay. Spend the migration time on a product feature instead.

The decision tree

In rough order:

1. Writer with a paid newsletter → Substack (cold start) or Beehiiv (established)
2. Creator selling courses/books/memberships → ConvertKit
3. E-commerce past $500k GMV → Klaviyo
4. Indie SaaS doing lifecycle + transactional → Loops
5. Cheapest reliable list-based → EmailOctopus
6. Technical writer who wants simplicity → Buttondown
7. Established business on Mailchimp → Stay until something specific breaks

There's no universal "best" ESP. There's only the best one for what you're sending and who you're sending it to. Pick on that axis and ignore the comparison grids.