MailerSend alternative
A European MailerSend alternative with mailboxes built in
MailerSend is a solid transactional API with a no-code template editor. PostStack matches the API ergonomics, undercuts on price, ships IMAP mailboxes, and runs entirely on EU infrastructure.
Why teams pick PostStack over MailerSend
IMAP mailboxes alongside the API
MailerSend is send-only. PostStack ships Dovecot-backed IMAP/POP3 and a webmail client on every domain you own.
EU-only, by design
MailerSend hosts in both US and EU; routing depends on your account. PostStack is EU-only, full stop — no surprise transatlantic data flows.
A free tier 6× the size
MailerSend cut its free tier to 500 emails/month (and a 100/day cap) in late 2025. PostStack's free tier is 3,000 emails/month with the same features as paid plans — six times the headroom before you pay.
Native MCP for AI agents
PostStack ships an MCP server (Model Context Protocol) so Claude, Cursor, and other AI assistants can send email and manage contacts as tool calls. MailerSend has no equivalent.
Data residency at a glance
| MailerSend | PostStack | |
|---|---|---|
| Company HQ | United States | Denmark (EU) |
| Where your email data lives | US and EU — routing depends on your account | Helsinki, Finland — never leaves the EU |
| US CLOUD Act reach | Yes | No |
A US parent plus account-dependent routing means transatlantic data flows are possible. Why EU hosting alone isn't enough →
Pricing at a glance
| Volume | MailerSend | PostStack |
|---|---|---|
| 500 emails / month | Free | Free |
| 50,000 emails / month | ~$32/mo (Starter) | €15/mo |
| 100,000 emails / month | ~$78/mo | €30/mo |
| 500,000 emails / month | ~$478/mo | €130/mo |
Competitor prices are public list prices (USD) verified May 2026; PostStack prices are in EUR. Figures are approximate after currency conversion — check each provider's pricing page for current rates. PostStack overages bill at €0.25 per 1,000 emails — see /pricing for the full breakdown.
Stay on MailerSend if…
Stay on MailerSend if you depend on their drag-and-drop template editor or need their inbound routing primitives specifically.
Switch to PostStack if…
Switch to PostStack if you want EU-only routing, IMAP mailboxes, an MCP server for AI agents, or lower bills at every paid tier — up to ~49% off at the 50k volume, narrowing at the highest tiers.
Frequently asked questions
Does PostStack have a no-code template builder like MailerSend?
Yes. PostStack ships a block-based visual builder with conditional content, dynamic merges, and HTML preview. The output is portable HTML, so you can also write templates by hand.
How does MailerSend pricing compare to PostStack?
PostStack is cheaper at every paid tier, and its free tier is 6× larger (3,000 emails/month vs MailerSend's 500). Paid-tier savings range from ~9% at the 100k tier to ~49% at the 50k tier (after FX).
Can I host my domain mailboxes on PostStack?
Yes. PostStack ships full IMAP and POP3 hosting via Dovecot, plus a browser webmail client. MailerSend is send-only.