Email marketing

Open-source alternatives to Mailchimp

3 self-hostable options you can run on your own server, compared on facts from GitHub (fetched Oct 21, 2026).

Side-by-side comparison

Tool	listmonk	Mautic	Keila
GitHub stars	23,896	10,822	2,243
License	AGPL-3.0	Custom / see repo	AGPL-3.0
Last push	Oct 21, 2026 Active	Oct 21, 2026 Active	Oct 20, 2026 Active
Forks	2,711	3,506	174
Open issues + PRs	59	312	82
Main language	Go	PHP	Elixir
Links	Repo · Website	Repo · Website	Repo · Website

Highlighted cells mark the highest star count and the most recent push. Source: GitHub REST API, per-tool links on each tool page. Copyleft licenses (AGPL/GPL) require sharing modifications if you distribute or (AGPL) serve them; check the repo license before deploying.

The options

listmonk

Email marketing

High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.

24k AGPL-3.0 Active

Replaces Mailchimp

Mautic

Email marketing

Mautic: Open Source Marketing Automation Software.

11k Custom / see repo Active

Replaces Mailchimp

Keila

Email marketing

Open Source Newsletter Tool.

2.2k AGPL-3.0 Active

Replaces Mailchimp