head to head · open source
Mattermost vs ProjectDiscovery
Mattermost has 39,093 GitHub stars, 9,000 forks, 1,012 open issues and last shipped yesterday. ProjectDiscovery has 31,272 stars, 3,875 forks, 107 open issues and last shipped 3 days ago. Mattermost leads on adoption by 25% (39,093 vs 31,272 stars). Mattermost is written in TypeScript under a custom or non-standard licence; ProjectDiscovery is written in Go under MIT. Mattermost has attracted 23% as many forks as stars, ProjectDiscovery 12%. Mattermost was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (hacktoberfest), so they are genuine substitutes rather than adjacent tools.
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
| Mattermost | ProjectDiscovery | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 31K |
| License | Custom / other | MIT |
| Written in | TypeScript | Go |
| Last push | 2026-09-17 | 2026-09-15 |
| Forks | ⑂ 9.0K | ⑂ 3.9K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mattermost if
- You weight community size — 39K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick ProjectDiscovery if
- You want the ProjectDiscovery feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and ProjectDiscovery fits your workflow better
About Mattermost
Mattermost is an open core, self hosted collaboration platform for teams that need secure chat, workflow automation, voice calling, screen sharing, and AI integration while keeping the deployment under their own control.
read the full Mattermost overview →
About ProjectDiscovery
Nuclei is a high performance, open source vulnerability scanner built by ProjectDiscovery, part of the ProjectDiscovery ecosystem. It operates as a CLI tool using a simple YAML based DSL to define custom vulnerability checks, enabling precise, real world exploitation simulation to eliminate false positives.
read the full ProjectDiscovery overview →
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Frequently asked questions
Is Mattermost or ProjectDiscovery more popular?
Mattermost has 39,093 GitHub stars and ProjectDiscovery has 31,272. Mattermost has the larger community by that measure.
Are Mattermost and ProjectDiscovery free?
Both are open source. Mattermost has no licence declared in this registry, and ProjectDiscovery is licensed under MIT. Both are free to self-host.
What is the difference between Mattermost and ProjectDiscovery?
Mattermost is written in TypeScript and ProjectDiscovery in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Mattermost or ProjectDiscovery?
Choose Mattermost if you want the larger community (39,093 stars) or its Custom / other licence terms. Choose ProjectDiscovery if its feature set, stack or MIT licence fits better. Both are self-hostable.