mailcow alternatives
Providers that compete with mailcow on at least one of: Self-hosted
Dockerized groupware and email server suite.
Switching as teams choosing a transactional API
Judged purely as an API. What the request contract guarantees on retry, how complete the webhook event coverage is, whether suppressions are readable and writable programmatically, and how much the message log retains when something needs debugging in production.
mailcow does not cover idempotency keys, webhook coverage, batch sending, and SDK breadth. Novu, Plunk, and Postal close that gap. The order below weighs this audience's priorities first, so it differs from a general popularity ranking.
ranked for teams choosing a transactional API
- 01
Novu
Notifications Self-hostedOpen-source notification infrastructure.
Adds idempotency keys, webhook coverage, batch sending, and SDK breadth over mailcow, with nothing given up on these priorities.
30,000 events/mo on cloud, free self-hosted · $250/mo (Business cloud) - 02
Plunk
Self-hosted MarketingOpen-source unified email platform.
Adds webhook coverage, batch sending, and SDK breadth over mailcow, with nothing given up on these priorities.
3,000/mo on hosted free plan · $19/mo or self-host - 03
Postal
Self-hosted TransactionalOpen-source mail delivery platform.
Adds webhook coverage, batch sending, and SDK breadth over mailcow, with nothing given up on these priorities.
Free, self-hosted · Self-hosted only - 04
Listmonk
Newsletter Self-hostedSelf-hosted newsletter and mailing list manager.
Adds webhook coverage and batch sending over mailcow, with nothing given up on these priorities.
Free, self-hosted · Self-hosted only - 05
Ghost
Newsletter Self-hostedOpen-source publishing with built-in memberships and email.
Adds webhook coverage, batch sending, and SDK breadth, gives up event stream.
Self-hosted is free (your infra cost) · Ghost Pro from $9/mo - 06
Cuttlefish
Self-hosted TransactionalOpen-source transactional email server with a web UI.
Matches mailcow on every priority weighed here, so the decision is price and preference.
Free self-hosted, open source · Free self-hosted - 07
maddy
Self-hostedComposable all-in-one mail server.
Gives up event stream and the suppressions API against mailcow and adds nothing on these priorities.
Free self-hosted, GPL-3.0 · Free self-hosted
mailcow and its alternatives, side by side
Columns are the priorities teams choosing a transactional API weigh, in order. mailcow is the first row so the trade in each direction is readable at a glance.
| Provider | Idempotency keys | Webhooks | Event stream | Operating since | Suppressions API | Best published rate per 1,000 | Batch sending | SDKs |
|---|---|---|---|---|---|---|---|---|
| mailcow | No | No | Yes | Not published | Yes | Tiers not published in comparable form | No | None |
| Novu | Yes | Yes | Yes | 2021 | Yes | Tiers not published in comparable form | Yes | node, python, go, php, java, dotnet |
| Plunk | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node, python |
| Postal | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node, ruby, php |
| Listmonk | No | Yes | Yes | Not published | Yes | Tiers not published in comparable form | Yes | None |
| Ghost | No | Yes | No | 2013 | Yes | Tiers not published in comparable form | Yes | node |
| Cuttlefish | No | No | Yes | Not published | Yes | Tiers not published in comparable form | No | None |
| maddy | No | No | No | Not published | No | Tiers not published in comparable form | No | None |
Novu, Plunk, and Postal add capability without giving anything up on these priorities. The rest trade one thing for another.