Best self-hosted email
Open-source platforms you can run on your own infrastructure.
criteria
- License clarity
- Operational maturity
- Community activity
- 01
Postal
Self-hosted TransactionalMost mature open-source SMTP-server replacement.
- 02
mailcow
Self-hostedFull Dockerized mail and groupware suite with admin UI, Postfix, Dovecot, Rspamd, and SOGo.
- 03
maddy
Self-hostedCompact all-in-one mail server with SMTP, MX receipt, IMAP, DKIM, SPF, DMARC, DANE, and MTA-STS.
- 04
Plunk
Self-hosted MarketingUnified marketing plus transactional in a single AGPL app.
- 05
Listmonk
Newsletter Self-hostedSingle-binary newsletter manager. Bring your own SMTP.
- 06
Cuttlefish
Self-hosted TransactionalSelf-hosted transactional email dashboard around Postfix with bounce handling and analytics.
- 07
Novu
Notifications Self-hostedOpen-source notification infrastructure with email as one channel.
- 08
Ghost
Newsletter Self-hostedSelf-hosted publishing with built-in newsletters.
All 8 compared
Every provider in this ranking against the priorities developers picking email infrastructure weigh. Free tier and entry price sit with each pick above.
| Provider | DX score | SDKs | Idempotency keys | Operating since | Event stream | Best published rate per 1,000 | Webhooks |
|---|---|---|---|---|---|---|---|
| Postal | 6/10 | node, ruby, php | No | Not published | Yes | Tiers not published in comparable form | Yes |
| mailcow | 7/10 | None | No | Not published | Yes | Tiers not published in comparable form | No |
| maddy | 6/10 | None | No | Not published | No | Tiers not published in comparable form | No |
| Plunk | 7/10 | node, python | No | Not published | Yes | Tiers not published in comparable form | Yes |
| Listmonk | 7/10 | None | No | Not published | Yes | Tiers not published in comparable form | Yes |
| Cuttlefish | 6/10 | None | No | Not published | Yes | Tiers not published in comparable form | No |
| Novu | 8/10 | node, python, go, php, java, dotnet | Yes | 2021 | Yes | Tiers not published in comparable form | Yes |
| Ghost | 7/10 | node | No | 2013 | No | Tiers not published in comparable form | Yes |
If you are developers picking email infrastructure
The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.
The order above is the general editorial ranking. Re-sorted against developer experience, SDK breadth, and idempotency keys, the shortlist for password resets, receipts, and magic links shipped from application code becomes Novu, Postal, and Plunk. That differs from the headline order, which weighs all audiences together.