European Postmark alternative

Postmark has no EU region, and says so plainly

Unlike most of the providers in this category, Postmark doesn’t offer EU data residency as a plan tier or an alternate endpoint. It hosts in the United States — its own data centre outside Chicago, plus AWS — and its position has been that the GDPR does not require personal data to be physically stored in Europe, which is true as a matter of law.

That makes this the clearest of these comparisons. There’s no configuration to argue about and no region to route around: if your requirement is that recipient data stays in the EU and is handled by an EEA-established processor, Postmark cannot meet it, and no amount of goodwill about the product changes that. Ownership points the same way — Postmark has been part of ActiveCampaign, a US company, since 2022.

What eusend puts in its place

Vague residency claims are worth very little, so here is the actual map — every component that touches an email, and where it runs.

The same shape of API

Postmark and eusend agree about what a transactional email service is: an HTTP API, an SMTP door for the things that only speak SMTP, signed webhooks for delivery events, and a message log you can actually search when a customer says they never got it. The migration is mostly casing — Postmark’s PascalCase fields become camelCase, and errors arrive as values rather than exceptions.

- import { ServerClient } from 'postmark'
+ import { Eusend } from '@eusend_dev/sdk'

- const client = new ServerClient(process.env.POSTMARK_SERVER_TOKEN)
+ const client = new Eusend(process.env.EUSEND_API_KEY)

- await client.sendEmail({
-   From: 'Acme <hello@acme.com>',
-   To: 'user@example.com',
-   Subject: 'Your receipt',
-   HtmlBody: html,
-   MessageStream: 'outbound',
- })
+ const { data, error } = await client.emails.send({
+   from: 'Acme <hello@acme.com>',
+   to: 'user@example.com',
+   subject: 'Your receipt',
+   html,
+ })

• Message streams have no equivalent, and mostly don’t need one. Transactional sending is the default path. Opt-in broadcasts are a separate surface with audiences and contacts rather than a stream you tag a send with.
• Webhooks are signed, not allowlisted. Where Postmark leans on basic auth or IP allowlists to protect your endpoint, every eusend webhook carries an HMAC-SHA256 signature — verify it and you’re done.
• Attachments map field for field. Name → filename, Content → content (still base64), ContentType → content_type. Up to 20 files, 10 MB combined.
• SMTP is a host swap. Point at smtp.eusend.dev on port 465 with implicit TLS, username eusend, API key as the password.

The field-by-field version is in the Postmark migration guide.

Price, since it usually comes up second

eusend’s free tier is 3,000 emails a month — enough that a small product may never pay — and paid plans run from €9 a month for 10,000 up to €430 for 2,000,000, with the price per thousand falling smoothly in between. Overage above your chosen volume is billed per thousand and capped at the price of the next volume up, so a busy month cannot produce a surprise larger than an upgrade.

Current numbers are always on the pricing page, which is where you should compare them rather than trusting a figure written into a comparison page months ago.

Where Postmark is still ahead

Being straight about this is more useful than a feature table that happens to end in our favour. Postmark has been doing this for well over a decade, with the sender reputation, the support organisation and the accumulated deliverability knowledge that come with that. eusend is younger and run by a small team.

What we can point at concretely is the engineering: we operate our own MTA rather than reselling another provider’s sending service, which means the SMTP conversation with the receiving server and the reason a message deferred are things we can read and act on. Hard bounces and complaints are suppressed automatically, a domain cannot send until DKIM is verified, and sustained bounce rates above 4% or complaint rates above 0.08% suspend sending without a human in the loop. The deliverability page sets out the whole model. Then test it on your own traffic — that evidence beats anything either of us writes on a page like this.

Common questions