head to head · open source
Listmonk vs OpenOutreach
Listmonk has 24,124 GitHub stars, 2,742 forks, 111 open issues and last shipped yesterday. OpenOutreach has 3,478 stars, 626 forks, 1 open issues and last shipped 11 days ago. Listmonk leads on adoption by 594% (24,124 vs 3,478 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 | ★ 24K | ★ 3.5K |
| License | AGPL-3.0 | GPL-3.0 |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-10-23 |
| Forks | ⑂ 2.7K | ⑂ 626 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Listmonk if
- You weight community size — 24K 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. It is fast, feature rich, and packed into a single binary. It uses a PostgreSQL database as its data store. Visit listmonk.app for more info. Check out the live demo . Installation Docker The latest image is available on DockerHub at listmonk/listmonk:latest . Download and use the sample docker compose.yml. Visit See installation docs Binary Download the latest release and extract the listmonk binary. ./listmonk new config to generate config.toml. Edit it. ./listmonk install to setup the Postgres DB (or upgrade to upgrade an existing DB…
read the full Listmonk overview →
About OpenOutreach
OpenOutreach — open source AI agent for B2B lead generation Describe your product. Define your target market. The AI finds the people who fit, tells you why each one does, and emails them. Self hosted CLI. One install, one onboarding, one command. Demo 🚀 What is OpenOutreach? OpenOutreach is a self hosted, open source lead finder that qualifies for you — and then writes the email. You describe your product and your target market; it discovers matching people from a licensed data provider , judges each one against the ICP it learned from your description, hands you the ones that fit with the reason each was…
read the full OpenOutreach overview →
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Frequently asked questions
Is Listmonk or OpenOutreach more popular?
Listmonk has 24,124 GitHub stars and OpenOutreach has 3,478. 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 (24,124 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.