Cost / License
- Free
- Open Source (MIT)
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
Germany
EU


BillionMail gives you open-source mail server, newsletter, email marketing — fully self-hosted, dev-friendly, and free from monthly fees.

PostStack is a developer-first transactional email API for European teams. Send via REST or SMTP, host IMAP/POP3 mailboxes on your own domains, and run broadcasts — all from EU infrastructure with transparent pricing from €5/mo.
