Mautic
87 · HealthyMarketing automation platform with campaigns, segments, landing pages and lead scoring.
Open source alternatives to Mailchimp
5 open source projects replace Mailchimp, ranked by how safe each is to depend on.
listmonk
83 · HealthyHigh-performance newsletter and mailing-list manager shipped as a single binary.
Keila
64 · StableNewsletter tool with a block editor, sign-up forms and campaign stats.
BillionMail
56 · CautionSelf-hosted mail server and newsletter platform for campaigns, templates and subscriber lists.
Mailtrain
15 · At riskSelf-hosted newsletter app built on Node.js.
Source-available and unverified licenses
The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.
Notifuse
68 · StableNewsletter, email marketing and transactional email platform with a visual MJML editor and several sending providers.
At a glance
Health and license are separate verdicts: a project can be well maintained and still not be open source.
| Project | Health | License | Stars |
|---|---|---|---|
| Mautic | 87 · Healthy | Free, share changesGPL-3.0-or-later | 11k |
| listmonk | 83 · Healthy | Free, share hosted changesAGPL-3.0 | 24k |
| Keila | 64 · Stable | Free, share hosted changesAGPL-3.0 | 2.2k |
| BillionMail | 56 · Caution | Free, share hosted changesAGPL-3.0Relicensed 2025 | 16k |
| Mailtrain | 15 · At risk | Free, share changesGPL-3.0 | 5.8k |
| Notifuse | 68 · Stable | Free core, paid extrasBusiness Source License 1.1 | 2.2k |
More in Email marketing
Mailchimp is a paid email marketing product. See all open source email marketing tools, ranked the same way.
Scores last refreshed from GitHub on 9 October 2026. How we score.