8 Best Self-Hosted Email Tools (2026), Tested
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 growth and lifecycle teams weigh. Free tier and entry price sit with each pick above.
| Provider | Scheduling | Event stream | Operating since | Suppressions API | Best published rate per 1,000 | Multi-tenant |
|---|---|---|---|---|---|---|
| Postal | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes |
| mailcow | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes |
| maddy | No | No | Not published | No | Tiers not published in comparable form | Yes |
| Plunk | Yes | Yes | Not published | Yes | Tiers not published in comparable form | No |
| Listmonk | Yes | Yes | Not published | Yes | Tiers not published in comparable form | No |
| Cuttlefish | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes |
| Novu | Yes | Yes | 2021 | Yes | Tiers not published in comparable form | Yes |
| Ghost | Yes | No | 2013 | Yes | Tiers not published in comparable form | No |
If you are growth and lifecycle teams
Growth work lives or dies on targeting and measurement. What matters is whether behavioral triggers can be built without engineering time, whether the event stream supports attribution past the open, and whether deliverability holds when broadcast volume shares a reputation with product email.
The order above is the general editorial ranking. Re-sorted against scheduling, event stream, and operating track record, the shortlist for behavior-triggered journeys, broadcasts, and winback campaigns measured on revenue becomes Novu, Plunk, and Listmonk. That differs from the headline order, which weighs all audiences together.