Postmark alternative
A Postmark alternative that is up to 70% cheaper
Looking for a Postmark alternative? PostStack offers Postmark-grade transactional deliverability on EU-hosted infrastructure, with paid plans from €5/mo instead of $15, and IMAP mailboxes plus a visual builder Postmark does not ship.
Why teams pick PostStack over Postmark
Free tier where Postmark has none
Postmark charges $15/mo from the very first email. PostStack ships 3,000 emails per month free, forever — same level Resend offers.
European, not US infrastructure
Postmark hosts in the US (now part of ActiveCampaign). PostStack runs in Germany and Finland, which means GDPR compliance is structural rather than paper-only.
More than transactional
Postmark splits "transactional" and "broadcast" servers and bills them separately. PostStack handles both inside one account, plus IMAP mailboxes, signup forms, and workflow automation that Postmark does not offer.
Same low-bounce focus
PostStack is just as opinionated about deliverability hygiene — strict bounce/complaint suppressions, RFC 8058 one-click unsubscribe, automated DKIM/SPF/DMARC checks, and Rspamd pre-flight scoring on every send.
Pricing at a glance
| Volume | Postmark | PostStack |
|---|---|---|
| 3,000 emails / month | $15/mo | Free |
| 10,000 emails / month | $15/mo | €5/mo |
| 50,000 emails / month | $50/mo | €15/mo |
| 100,000 emails / month | $100/mo | €65/mo |
Public list prices. PostStack overages bill at €0.65 per 1,000 emails. See /pricing for the full breakdown.
Stay on Postmark if…
Stay on Postmark if you need their transactional-only deliverability brand for stakeholder reasons, or rely on their specific bounce-reason classifications.
Switch to PostStack if…
Switch to PostStack if you want a free tier, EU data residency, broadcasts and transactional in one account, or up to 70% lower bills at every volume.
Frequently asked questions
Will I get Postmark-level deliverability on PostStack?
PostStack runs on Postfix with the same hygienic defaults Postmark popularised — fast bounce/complaint suppressions, one-click unsubscribe, strict DKIM signing, RBL monitoring, and per-domain reputation tracking. EU-bound mail performs identically; US deliverability is on par with mainstream providers.
Can I send broadcasts from a PostStack transactional account?
Yes. PostStack does not split transactional and broadcast servers — both flow through one API, with separate suppression lists per type. Postmark requires you to provision a "broadcast server" and pay separately.
How long does migrating from Postmark take?
Under an hour for most teams. /migrate/postmark walks through swapping the Postmark SDK for @poststack/sdk and updating the camelCase field names.