Last updated: July 2026
Sub-processors
A sub-processor is a third party we engage to process personal data on your behalf. We keep the list short. This page is the canonical list referenced by our Data Processing Addendum and Privacy Policy.
| Sub-processor | Purpose | Location | Transfer safeguard |
|---|---|---|---|
| Hetzner Hetzner Online GmbH | Hosts our application and email delivery services | Germany & Finland (EU/EEA) | None — within EEA |
| UpCloud UpCloud Ltd | Hosts our managed application database and object storage (both encrypted at rest) | Germany & Finland (EU/EEA) | None — within EEA |
| Better Stack BetterStack s.r.o. | Monitors the uptime of our public endpoints | Czech Republic (EU/EEA) | None — within EEA |
| Sentry Functional Software, Inc. | Application error and performance diagnostics | Germany (Sentry EU region) | SCCs — data stored in EU, US-parented vendor |
| Cloudflare Cloudflare, Inc. | DNS, edge security in front of our website, signup bot check, inbound operational mail | United States | EU–U.S. Data Privacy Framework |
| Vercel Vercel Inc. | Serves the website and dashboard front-end | United States | EU–U.S. Data Privacy Framework |
Not a sub-processor: Polar
Polar (Polar Software, Inc., USA) is the seller of record for eusend purchases. It processes your billing data as an independent data controller in its own name — not as our sub-processor — so it is listed here for transparency but is not part of the list above. The emails you send, your recipient lists, and your account content never reach Polar. See our Privacy Policy for details.
Changes to this list
We will give at least 30 days' notice before adding or replacing a sub-processor that processes customer personal data. To be notified of changes, or to object on reasonable data-protection grounds, email [email protected].