head to head · open source
Mattermost vs Tongsuo
Mattermost has 39,510 GitHub stars, 9,087 forks, 1,012 open issues and last shipped yesterday. Tongsuo has 1,554 stars, 263 forks, 160 open issues and last shipped 8 days ago. Mattermost leads on adoption by 2,442% (39,510 vs 1,554 stars). Mattermost is written in TypeScript under a custom or non-standard licence; Tongsuo is written in C under Apache-2.0. Mattermost has attracted 23% as many forks as stars, Tongsuo 17%. 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 | Tongsuo | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 1.6K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | C |
| Last push | 2026-11-02 | 2026-10-26 |
| Forks | ⑂ 9.1K | ⑂ 263 |
| 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 Tongsuo if
- You want the Tongsuo feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C
- You evaluated both and Tongsuo 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 Tongsuo
OpenAtom 铜锁/Tongsuo ========================= [![tongsuo logo]][www.tongsuo.net] [![github actions ci badge]][github actions ci] ![GitHub Release][github release] [![GitHub Downloads (all assets, all releases)][github downloads]]( 铜锁/Tongsuo是一个提供现代密码学算法和安全通信协议的开源基础密码库，为存储、网络、密钥管理、隐私计算等诸多业务场景提供底层的密码学基础能力，实现数据在传输、使用、存储等过程中的私密性、完整性和可认证性，为数据生命周期中的隐私和安全提供保护能力。 铜锁获得了国家密码管理局商用密码检测中心颁发的商用密码产品认证证书，助力用户在国密改造、密评、等保等过程中，更加严谨地满足我国商用密码技术合规的要求。可在此处下载资质原始文件。 特性 ========================= 铜锁提供如下主要的功能特性： 技术合规能力 符合 GM/T 0028《密码模块安全技术要求》的"软件密码模块安全一级"资质 符合 GM/T 0005 2021《随机性检测规范》 零知识证明（ZKP） Bulletproofs range Bulletproofs R1CS 密码学算法…
read the full Tongsuo overview →
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Frequently asked questions
Is Mattermost or Tongsuo more popular?
Mattermost has 39,510 GitHub stars and Tongsuo has 1,554. Mattermost has the larger community by that measure.
Are Mattermost and Tongsuo free?
Both are open source. Mattermost has no licence declared in this registry, and Tongsuo is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Mattermost and Tongsuo?
Mattermost is written in TypeScript and Tongsuo in C. 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 Tongsuo?
Choose Mattermost if you want the larger community (39,510 stars) or its Custom / other licence terms. Choose Tongsuo if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.