36.2k
Mattermost
An open source platform for secure collaboration across the entire software development lifecycle.
⚡
Productivity🛠️
Tools⚙️
DevOps🔒
Security
3 Open Source Alternatives to Rocket.Chat
There are 3 open-source alternatives to Rocket.Chat in this directory. The most popular is Mattermost with 36.2k GitHub stars, followed by Zulip(25.0k stars). All are open source, free to use, and many can be self-hosted.
Quick comparison
| # | Tool | Stars | Language | License |
|---|---|---|---|---|
| 1 | Mattermost An open source platform for secure collaboration across the entire software development lifecycle. | 36.2k | TypeScript | Other |
| 2 | Zulip An open-source team chat that helps teams stay productive and focused. | 25.0k | Python | Apache License 2.0 |
| 3 | Signal-Server Backend server powering the Signal Private Messenger, ensuring secure, end-to-end encrypted messaging and calling across Android, Desktop, and iOS. | 10.2k | Java | GNU Affero General Public License v3.0 |
All open-source alternatives to Rocket.Chat
25.0k
Zulip
An open-source team chat that helps teams stay productive and focused.
👨💻
Development⚡
Productivity🛠️
Tools🏠
Self-Hosted
10.2k
Signal-Server
Backend server powering the Signal Private Messenger, ensuring secure, end-to-end encrypted messaging and calling across Android, Desktop, and iOS.
🔁
API🔒
Security🌐
Web⚙️
DevOps
Frequently asked questions
What are the best open-source alternatives to Rocket.Chat?
The top three are Mattermost(36.2k stars), Zulip(25.0k stars), Signal-Server(10.2k stars). All are open source and free to use.
Are these alternatives to Rocket.Chat free?
Yes. Every tool listed here is open source and free to use in your own projects. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Can I self-host an alternative to Rocket.Chat?
Many of the alternatives listed are self-hostable. Each tool's page lists hosting details, system requirements, and licensing terms.
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