Retransmit vs eusend
Both are transactional-first email APIs. eusend's promise is EU data residency on its own mail servers. Retransmit's promise is an open stack you can self-host anywhere and fund with prepaid credits.
By the Retransmit team. Last updated .
Retransmit builds one of the products compared here. Every competitor number was checked on the vendor's own site on the date above, and nothing on this page is paid placement.
eusend runs its own sending infrastructure in German and Finnish data centres and keeps email data inside the EU, with metered plans from 9 euros a month. It is proprietary. Retransmit takes the opposite path to a similar developer experience: the source is public, you can run it on your own servers in any region, and the cloud bills by prepaid balance instead of a monthly plan. Both send webhooks, both verify domains with SPF and DKIM, and both keep the API small.
At a glance
The core trade: eusend gives you EU residency as a service, Retransmit gives you residency wherever you deploy it.
| Retransmit | eusend | |
|---|---|---|
| Positioning | Open email API, cloud or self-hosted | Transactional email built for Europe |
| Source code | AGPL-3.0 on GitHub, MIT licensed SDK | Proprietary |
| Self-hosting | Yes, free, any region | No |
| Infrastructure | Amazon SES, or your own SES credentials | Own mail servers in EU data centres |
| Free tier | Self-hosted, every feature | 3,000 emails a month, 100 a day, 1 domain |
| Paid model | Prepaid credits | From 9 euros a month for 10,000 emails, price falls with volume |
| SDKs | Node.js, plus REST | Node.js, Python, Go |
Sources: eusend pricing
Pricing
eusend uses one continuous price curve instead of plan tiers: 10,000 emails a month costs 9 euros at 0.90 euros per 1,000, and the rate falls smoothly to 0.215 euros per 1,000 at 2 million. Sending stops at quota by default, and metered overage is opt-in. The free tier is 3,000 emails a month.
Retransmit's cloud is a prepaid balance with no monthly commitment: it draws down as you send and stops when empty, so cost can never surprise you. Self-hosting is free at any volume.
| Retransmit | eusend | |
|---|---|---|
| Free tier | Self-hosted, every feature | 3,000 emails a month, 100 a day |
| 10,000 emails a month | Prepaid, pay per send | 9 euros |
| 2,000,000 emails a month | Prepaid, or self-host for free | About 430 euros at 0.215 euros per 1,000 |
| Overage | None, balance runs down | Opt-in, otherwise sending stops at quota |
| Dedicated IPs | No | Enterprise plans only |
| Payment methods | Bank transfer, mobile money, local currency | Card, billed through Polar |
Sources: eusend pricing
Feature comparison
Both keep the feature list short on purpose. eusend adds templates, React Email rendering, a test mode, and broadcasts. Retransmit adds batching at scale and a heavier webhook contract.
| Feature | Retransmit | eusend |
|---|---|---|
| Transactional API | Yes | Yes |
| Batch sending | Yes, 10,000 per request | Not documented |
| Broadcasts | Not yet | Yes, with one-click unsubscribe |
| Templates | Not yet | Yes |
| React Email | Not yet | Yes, rendered by the SDK |
| Test mode | Not yet | Yes, test keys and sandbox domain |
| Scheduling | Not yet | Not documented |
| Webhooks | 9 event types, HMAC-SHA256, 8 retries | Sent, delivered, bounced, complained, with retries |
| Data residency | Wherever you self-host, or SES regions in cloud | EU only, by design |
| SMTP relay | Not yet | Yes |
Which one should you pick
- Pick eusend if EU data residency is a compliance requirement and you want it managed for you.
- Pick eusend if you want React Email rendering and a test mode out of the box.
- Pick Retransmit if you want to self-host, in the EU or anywhere else, and own the deployment.
- Pick Retransmit if you batch large sends or need granular, signed delivery events.
- Pick Retransmit if prepaid credits and local payment methods beat a euro card subscription for you.
Residency by contract, or residency by deployment. If you want the second, the stack is yours to run.
Related resources
Best Resend alternatives in 2026
Four alternatives compared on price, features, and self-hosting.
Retransmit vs Resend
The open stack against the polished default.
Retransmit quickstart
Verify a domain, grab an API key, and send your first email in under five minutes.
Webhook docs
Nine event types, HMAC-SHA256 signatures, and a five line verification example.
Questions people ask
Is eusend open source?
No. eusend is a proprietary service running its own mail servers in EU data centres. Retransmit is AGPL-3.0 on GitHub and the stack self-hosts for free.
Can Retransmit keep my email data in the EU?
Yes, by self-hosting it on EU servers with EU-region SES credentials. eusend offers EU residency as a managed guarantee instead, with its own infrastructure in Germany and Finland.
What does eusend cost?
As of September 1, 2026, eusend is free for 3,000 emails a month, then priced on a curve from 0.90 euros per 1,000 at 10,000 emails a month down to 0.215 euros per 1,000 at 2 million. Sending stops at quota unless you opt into metered overage.
Which has the better webhook system?
Retransmit delivers nine event types with HMAC-SHA256 signatures over a timestamped payload and retries up to 8 times with backoff. eusend documents four event types with automatic retries. If you build on delivery events, Retransmit gives you more to work with.