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 SaaS product teams weigh. Free tier and entry price sit with each pick above.
| Provider | Multi-tenant | Event stream | Suppressions API | Operating since | Scheduling | Best published rate per 1,000 | Webhooks |
|---|---|---|---|---|---|---|---|
| Postal | Yes | Yes | Yes | Not published | No | Tiers not published in comparable form | Yes |
| mailcow | Yes | Yes | Yes | Not published | No | Tiers not published in comparable form | No |
| maddy | Yes | No | No | Not published | No | Tiers not published in comparable form | No |
| Plunk | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes |
| Listmonk | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes |
| Cuttlefish | Yes | Yes | Yes | Not published | No | Tiers not published in comparable form | No |
| Novu | Yes | Yes | Yes | 2021 | Yes | Tiers not published in comparable form | Yes |
| Ghost | No | No | Yes | 2013 | Yes | Tiers not published in comparable form | Yes |
If you are SaaS product teams
A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.
The order above is the general editorial ranking. Re-sorted against multi-tenant support, event stream, and the suppressions API, the shortlist for trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail becomes Novu, Postal, and mailcow. That differs from the headline order, which weighs all audiences together.