head to head · open source
Listmonk vs OpenOutreach
Listmonk has 23,483 GitHub stars, 2,612 forks, 111 open issues and last shipped 7 days ago. OpenOutreach has 3,041 stars, 560 forks, 1 open issues and last shipped 13 days ago. Listmonk leads on adoption by 672% (23,483 vs 3,041 stars). Listmonk is written in Go under AGPL-3.0; OpenOutreach is written in Python under GPL-3.0. Listmonk has attracted 11% as many forks as stars, OpenOutreach 18%. Listmonk was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Listmonk | OpenOutreach | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 3.0K |
| License | AGPL-3.0 | GPL-3.0 |
| Written in | Go | Python |
| Last push | 2026-09-13 | 2026-09-07 |
| Forks | ⑂ 2.6K | ⑂ 560 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Listmonk if
- You weight community size — 23K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick OpenOutreach if
- You want the OpenOutreach feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Python
- You evaluated both and OpenOutreach fits your workflow better
About Listmonk
Listmonk is a standalone, self hosted newsletter and mailing list manager in the open source business software and marketing customer engagement ecosystem. It packages campaign management, subscriber management, and email delivery controls into a single binary application with a modern dashboard, and it uses PostgreSQL as its data store.
read the full Listmonk overview →
About OpenOutreach
OpenOutreach is an open source AI agent for B2B lead generation, written in Python and licensed under GPL 3.0. It is a self hosted CLI that lets a user describe a product and target market, then finds matching people from a licensed data provider and judges each one against an ideal customer profile learned from those descriptions.
read the full OpenOutreach overview →
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Frequently asked questions
Is Listmonk or OpenOutreach more popular?
Listmonk has 23,483 GitHub stars and OpenOutreach has 3,041. Listmonk has the larger community by that measure.
Are Listmonk and OpenOutreach free?
Both are open source. Listmonk is licensed under AGPL-3.0 and OpenOutreach under GPL-3.0. Neither carries a licence fee.
What is the difference between Listmonk and OpenOutreach?
Listmonk is written in Go and OpenOutreach in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Listmonk or OpenOutreach?
Choose Listmonk if you want the larger community (23,483 stars) or its AGPL-3.0 licence terms. Choose OpenOutreach if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.