The Secure CommsOS™ for mission-critical operations
- Language
- TypeScript
- Licence
- Other
- Stars
- 46k
- Latest
- 9.0.0
- Last push
- 2026-11-12
Team chat
Self-hosted messaging for teams.
Changes in this category (RSS)
Side by side
| Tool | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|
| Rocket.Chat | 46k | Other | Open core | Yes | TypeScript | 9.0.0 | 2026-11-12 |
| Mattermost | 40k | Other | Open core | Yes | TypeScript | v12.0.2 | 2026-11-12 |
| Zulip | 26k | Apache-2.0 | Open source | Yes | Python | 12.4 | 2026-11-11 |
| Tinode | 14k | GPL-3.0 | Open source | Yes | Go | v0.25.3 | 2026-10-25 |
| Fluxer | 11k | AGPL-3.0 | Open source | Yes | TypeScript | fluxer-release@2026.1112.20122 | 2026-11-12 |
| Mumble | 8.4k | Other | Open source | Yes | C++ | v1.5.939 | 2026-11-11 |
| ejabberd | 6.8k | Other | Open source | Yes | Erlang | 26.09 | 2026-11-10 |
| Campfire | 4.8k | MIT | Open source | Yes | Ruby | v1.5.8 | 2026-11-06 |
| Synapse | 4.8k | AGPL-3.0 | Open source | Yes | Python | v1.165.0 | 2026-11-11 |
| Stoat | 3.5k | Other | Open source | Yes | Rust | v0.16.4 | 2026-11-11 |
| Openfire | 3.1k | Apache-2.0 | Open source | Yes | Java | v5.1.2 | 2026-11-11 |
| Wire Server | 2.8k | AGPL-3.0 | Open source | Yes | Haskell | 2026-10-26 | 2026-11-11 |
| Tuwunel | 2.8k | Apache-2.0 | Open source | Yes | Rust | v2.0.0-assets | 2026-11-11 |
| Spacebar | 2.2k | AGPL-3.0 | Open source | Yes | TypeScript | none | 2026-11-11 |
| MongooseIM | 1.8k | Other | Open source | Yes | Erlang | 6.10.0 | 2026-11-08 |
| Dendrite | 992 | AGPL-3.0 | Open source | Yes | Go | v0.15.2 | 2026-09-17 |
| Raven | 847 | AGPL-3.0 | Open source | Yes | TypeScript | v3.2.0 | 2026-11-09 |
| Snikket | 476 | Apache-2.0 | Open source | Yes | Lua | stable.20260611.1 | 2026-11-01 |
18 tools
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
- Language
- TypeScript
- Licence
- Other
- Stars
- 40k
- Latest
- v12.0.2
- Last push
- 2026-11-12
Zulip server and web application. Open-source team chat that helps teams stay productive and focused.
- Language
- Python
- Licence
- Apache-2.0
- Stars
- 26k
- Latest
- 12.4
- Last push
- 2026-11-11
Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots
A free and open source instant messaging and VoIP chat app built for friends, groups, and communities.
- Language
- TypeScript
- Licence
- AGPL-3.0
- Stars
- 11k
- Last push
- 2026-11-12
Mumble is an open-source, low-latency, high quality voice chat software.
Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)
Super simple group chat, without a subscription
Synapse: Matrix homeserver written in Python/Twisted + Rust
The software powering Stoat
An XMPP server licensed under the Open Source Apache License.
- Language
- Java
- Licence
- Apache-2.0
- Stars
- 3.1k
- Latest
- v5.1.2
- Last push
- 2026-11-11
🇪🇺 Wire back-end services
- Language
- Haskell
- Licence
- AGPL-3.0
- Stars
- 2.8k
- Latest
- 2026-10-26
- Last push
- 2026-11-11
Official successor to conduwuit
- Language
- Rust
- Licence
- Apache-2.0
- Stars
- 2.8k
- Latest
- v2.0.0-assets
- Last push
- 2026-11-11
Spacebar server - A reimplementation of the Discord.com backend, built with Typescript and love
- Language
- TypeScript
- Licence
- AGPL-3.0
- Stars
- 2.2k
- Last push
- 2026-11-11
MongooseIM is Erlang Solutions' robust, scalable and efficient XMPP server, aimed at large installations. Specifically designed for enterprise purposes, it is fault-tolerant and can utilise the resources of multiple clustered machines.
Dendrite is a second-generation Matrix homeserver written in Go!
Simple, open source team messaging platform
- Language
- TypeScript
- Licence
- AGPL-3.0
- Stars
- 847
- Latest
- v3.2.0
- Last push
- 2026-11-09
Image builder for Snikket server
- Language
- Lua
- Licence
- Apache-2.0
- Stars
- 476
- Latest
- stable.20260611.1
- Last push
- 2026-11-01