head to head · open source
Mattermost vs Certipy
Mattermost has 39,510 GitHub stars, 9,087 forks, 1,012 open issues and last shipped 2 days ago. Certipy has 3,714 stars, 490 forks, 25 open issues and last shipped 3 months ago. Mattermost leads on adoption by 964% (39,510 vs 3,714 stars). Mattermost is written in TypeScript under a custom or non-standard licence; Certipy is written in Python under MIT. Mattermost has attracted 23% as many forks as stars, Certipy 13%. Mattermost 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
| Mattermost | Certipy | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 3.7K |
| License | Custom / other | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-07-30 |
| Forks | ⑂ 9.1K | ⑂ 490 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mattermost if
- You weight community size — 40K 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 Certipy if
- You want the Certipy feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and Certipy fits your workflow better
About Mattermost
Mattermost is an open core, self hosted collaboration platform that offers chat, workflow automation, voice calling, screen sharing, and AI integration. This repo is the primary source for core development on the Mattermost platform; it's written in Go and React, runs as a single Linux binary, and relies on PostgreSQL. A new compiled version is released under an MIT license every month on the 16th. Deploy Mattermost on premises, or try it for free in the cloud. Learn more about the following use cases with Mattermost: DevSecOps Incident Resolution IT Service Desk Other useful resources: Download and Install…
read the full Mattermost overview →
About Certipy
Certipy AD CS Attack & Enumeration Toolkit Certipy is a powerful offensive and defensive toolkit for enumerating and abusing Active Directory Certificate Services (AD CS). It helps red teamers, penetration testers, and defenders assess AD CS misconfigurations including full support for identifying and exploiting all known ESC1 ESC17 attack paths. [!WARNING] Use only in environments where you have explicit authorization. Unauthorized use may be illegal. 🔍 Features 🔎 Discover Certificate Authorities and Templates 🚩 Identify misconfigurations 🔐 Request and forge certificates 🎭 Perform authentication using…
read the full Certipy overview →
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Frequently asked questions
Is Mattermost or Certipy more popular?
Mattermost has 39,510 GitHub stars and Certipy has 3,714. Mattermost has the larger community by that measure.
Are Mattermost and Certipy free?
Both are open source. Mattermost has no licence declared in this registry, and Certipy is licensed under MIT. Both are free to self-host.
What is the difference between Mattermost and Certipy?
Mattermost is written in TypeScript and Certipy 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, Mattermost or Certipy?
Choose Mattermost if you want the larger community (39,510 stars) or its Custom / other licence terms. Choose Certipy if its feature set, stack or MIT licence fits better. Both are self-hostable.