Topic
Open-source startups tagged #collaboration
15 open-source startups in this directory carry the GitHub topic #collaboration. 13 pushed code within 30 days of the snapshot of 2026-09-22, 0 have been quiet for 31–120 days, 2 have not pushed in over 120 days. Topics are set by each repository’s own maintainers, so this is what those projects chose to call themselves rather than a category we assigned.
13 of 15 pushed within 30 days of the snapshot of 2026-09-22. How we measure it →
The list
All 15, most-starred first.
The last column is the most recent push GitHub reported to us on 2026-09-22. It counts a push to any branch, by a person or a bot — it is not a claim that anyone is maintaining the project, and a quiet repository may be a finished one.
| Project | What it does | Stars | Ship status | Last verified push |
|---|---|---|---|---|
| excalidraw/excalidraw | Virtual whiteboard for sketching hand-drawn like diagrams | 132.7K | Still shipping | Sep 22, 2026 |
| RocketChat/Rocket.Chat | The Secure CommsOS™ for mission-critical operations | 46.2K | Still shipping | Sep 22, 2026 |
| imputnet/cobalt | best way to save what you love | 43.8K | Gone silent | Apr 6, 2026 |
| mattermost/mattermost | Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.. | 39.1K | Still shipping | Sep 22, 2026 |
| nextcloud/server | ☁️ Nextcloud server, a safe home for all your data | 36.9K | Still shipping | Sep 22, 2026 |
| mattermost-community/focalboard | Focalboard is an open source, self-hosted alternative to Trello, Notion, and Asana. | 26.5K | Gone silent | May 18, 2026 |
| zulip/zulip | Zulip server and web application. Open-source team chat that helps teams stay productive and focused. | 25.9K | Still shipping | Sep 22, 2026 |
| linkwarden/linkwarden | ⚡️⚡️⚡️ Self-hosted collaborative bookmark manager to collect, read, annotate, and fully preserve what matters, all in one place. | 19.8K | Still shipping | Sep 10, 2026 |
| ether/etherpad-lite | Etherpad: A modern really-real-time collaborative document editor. | 18.6K | Still shipping | Sep 22, 2026 |
| teambit/bit | AI-powered development workspaces with reusable components, architectural clarity and zero overhead. | 18.5K | Still shipping | Sep 22, 2026 |
| plait-board/drawnix | 开源白板工具（SaaS），一体化白板，包含思维导图、流程图、自由画等。All in one open-source whiteboard tool with mind, flowchart, freehand and etc. | 14.7K | Still shipping | Sep 8, 2026 |
| Unleash/unleash | Open-source feature management platform | 13.8K | Still shipping | Sep 22, 2026 |
| tinode/chat | Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots | 13.5K | Still shipping | Sep 13, 2026 |
| plankanban/planka | Elegant open source project tracking. Self-hosted Kanban for teams — free Community edition, with PLANKA Pro for organisations. | 12.6K | Still shipping | Sep 17, 2026 |
| wandb/wandb | The AI developer platform. Use Weights & Biases to train and fine-tune models, and manage models from experimentation to production. | 11.3K | Still shipping | Sep 22, 2026 |
Related collections
Sideways from here.
The 8 largest other topics in the directory, then the other ways to slice it. Every count is as of the snapshot of 2026-09-22.
Snapshot of 2026-09-22 · 721 repos in the directory · every number on this page is measured against that date, not against today. What this measurement cannot tell you →