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 early-stage startups weigh. Free tier and entry price sit with each pick above.
| Provider | Best published rate per 1,000 | DX score | Operating since | Scheduling | SDKs | Webhooks |
|---|---|---|---|---|---|---|
| Postal | Tiers not published in comparable form | 6/10 | Not published | No | node, ruby, php | Yes |
| mailcow | Tiers not published in comparable form | 7/10 | Not published | No | None | No |
| maddy | Tiers not published in comparable form | 6/10 | Not published | No | None | No |
| Plunk | Tiers not published in comparable form | 7/10 | Not published | Yes | node, python | Yes |
| Listmonk | Tiers not published in comparable form | 7/10 | Not published | Yes | None | Yes |
| Cuttlefish | Tiers not published in comparable form | 6/10 | Not published | No | None | No |
| Novu | Tiers not published in comparable form | 8/10 | 2021 | Yes | node, python, go, php, java, dotnet | Yes |
| Ghost | Tiers not published in comparable form | 7/10 | 2013 | Yes | node | Yes |
If you are early-stage startups
At an early stage the deciding factors are what the free tier actually covers, what the first paid invoice looks like, and how much of a founding engineer's week the setup costs. Feature depth that only matters at a million sends a month is noise until it is not.
The order above is the general editorial ranking. Re-sorted against best published rate per 1,000, developer experience, and operating track record, the shortlist for a waitlist, a launch announcement, onboarding email, and the first transactional sends becomes Plunk, Novu, and Ghost. That differs from the headline order, which weighs all audiences together.