Mailgun alternative
A Mailgun alternative built for European teams
Looking for a Mailgun alternative? PostStack gives you the same email infrastructure power without the legacy API and per-feature pricing — €5/mo entry, EU data residency, mailboxes included.
Why teams pick PostStack over Mailgun
No "Sinch tax" pricing
Mailgun was acquired by Sinch and has shifted to enterprise contracts and per-feature billing. PostStack is independent, transparent, and priced for indie and SMB teams from €5/mo.
Modern, typed REST API
Mailgun's API was state-of-the-art a decade ago. PostStack's is typed end-to-end with OpenAPI + SDKs in TypeScript, Python, and Go.
European, not US-or-EU-EU pricing tier
Mailgun charges extra for EU region routing. PostStack runs only in the EU — that is the default, not a surcharge.
Inbound + IMAP mailboxes
Mailgun has inbound parsing but no real mailbox layer. PostStack ships a full Dovecot IMAP/POP3 server plus webmail.
Pricing at a glance
| Volume | Mailgun | PostStack |
|---|---|---|
| 3,000 emails / month | $15/mo (Foundation) | Free |
| 10,000 emails / month | $15/mo | €5/mo |
| 50,000 emails / month | $35/mo | €15/mo |
| 100,000 emails / month | $75/mo | €65/mo |
Public list prices. PostStack overages bill at €0.65 per 1,000 emails. See /pricing for the full breakdown.
Stay on Mailgun if…
Stay on Mailgun if you have a multi-million-volume contract or rely on their email validation product as a separate SKU.
Switch to PostStack if…
Switch to PostStack if you want EU data residency by default, a modern API, real IMAP mailboxes, and low-volume pricing that does not require an enterprise SKU.
Frequently asked questions
How does PostStack compare to Mailgun on pricing?
PostStack is materially cheaper at low and mid volumes, especially because EU region routing is the default rather than a paid add-on.
Does PostStack support inbound email like Mailgun?
Yes. /docs/inbound-email covers webhook delivery for inbound mail, plus you can route inbound to a real IMAP mailbox on the same domain.
Is PostStack stable enough for production?
PostStack runs on Hetzner-backed dedicated infrastructure with active monitoring, fail2ban, RBL checks, automated bounce/complaint handling, and a public /status page.