mattermost
mattermost/mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Ship status
Still shippingPushed in the last 30 days.
- Last push
- Oct 3, 2026
- today
- Stars, last 7 weeks
- +264 stars in the 28 days to 2026-09-29
Shipping: pushed in the last 30 days · slowed: quiet for 31–120 days · silent: no push in over 120 days.
Repo facts
What GitHub reports.
- Stars
- 39.2K
- Forks
- 9K
- Open issues
- 1K
- Watchers
- 539
- Primary language
- TypeScript
- License
- Other
- Created
- Jun 15, 2015
- Owner
- mattermost · Organization
Open issues are the issues and pull requests GitHub reports as open; watchers are the accounts subscribed to the repository. License unknown — GitHub’s own license field, not legal advice. 208 startups in the directory ship primarily in TypeScript.
Topics
How it got here
What the classifier decided, and when.
Classified as an open-source startup by Jev, TypeSafe’s classifier, on Sep 22, 2026 — os_startup 100%, self-hostable 86%, hosted offering 94%. The classifier reads only the repository’s name, description and homepage; it can be wrong, and a probability under 0.5 puts a listing in the review queue rather than out of the directory.
Listed since the 2025-09 crawl. Answered by jev-1.13.0. How the classification works →
Embed your status
Put this badge on your README.
This is the badge for mattermost/mattermost, as served from the URL below.[](https://ossean.com/mattermost/mattermost)
Updates daily, from the last push GitHub saw.
Honest caveat: GitHub proxies README images through Camo and rewrites the anchor with rel=“nofollow”, so a README embed sends you referral traffic and brand, not link equity. The link is dofollow wherever you control the markup — your docs, your landing page, your blog. The snippet uses your frozen OSSEAN slug, so it survives a repo rename.
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