Free picks · Linux
Best free communication apps for Linux (2026)
Every pick is listed under Communication in our directory, runs on Linux and is completely free or has a free plan. We rank them by our rating and popularity, then favour tools made mainly for communication and apps built for Linux.
Short answer
The best free communication apps for Linux are Discord, Slack and Mattermost, the top three of 7 matches in our directory. All 7 have a free plan with paid upgrades; 4 are open source.
Updated
Built with love by Shushant Lakhyani. Building bestproductivityresources.com
At a glance
Counted from the top 7 picks, except the total.
- Matching tools
- 7
- Completely free
- 0
- Open source
- 4
- Work offline
- 0
- Native apps
- 0
Comparison table
“Free plan” means a free tier with paid upgrades. A dash in Licence means our directory does not list the tool as open source.
| # | Name | Pricing | Platforms | Licence | Why pick it |
|---|---|---|---|---|---|
| 1 | Discord | Free plan | Web, Windows, macOS, Linux, iOS, Android | — | Free voice, video and text chat for communities, friends and small teams. |
| 2 | Slack | Free plan | Web, macOS, Windows, Linux, iOS, Android | — | Team communication organised into channels. |
| 3 | Mattermost | Free plan | Web, Windows, macOS, Linux, iOS, Android | Open source | Self-hosted, open-source team chat with a free edition for small teams. |
| 4 | Zulip | Free plan | Web, macOS, Windows, Linux, iOS, Android | Open source | Open-source team chat where every conversation has a topic, so threads stay readable. |
| 5 | Pumble | Free plan | Web, macOS, Windows, Linux, iOS, Android | — | Team chat with a free plan for unlimited users and unlimited message history. |
| 6 | Rocket.Chat | Free plan | Web, Windows, macOS, Linux, iOS, Android | Open source | Open-source team chat you host yourself, free for up to 50 users. |
| 7 | Element | Free plan | Web, Windows, macOS, Linux, iOS, Android | Open source | Open-source, Matrix-based messaging you can self-host for free. |
Why each pick made the list
Every reason is taken from the tool's own listing: its categories, platforms, features, rating and pricing.
Our top Linux pick, rated 4.5/5, the highest here. Communication is its main purpose in our directory. Runs on Linux, and also on Web, Windows, macOS, iOS and 1 more platform. Its listing says it is easy to pick up. On our Mac list it is number 1.
Watch out for: Built for communities, so admin and compliance tools are thin for businesses
Number 2 of 7 for Linux, rated 4.2/5. Communication is its main purpose in our directory. Runs on Linux, and also on Web, macOS, Windows, iOS and 1 more platform. Its listing says it has AI features and is easy to pick up. On our Mac list it is number 2.
Watch out for: Can become a distraction engine
Number 3 of 7 for Linux, rated 4.4/5. Communication is its main purpose in our directory. Runs on Linux, and also on Web, Windows, macOS, iOS and 1 more platform. Its listing says it is privacy-focused. On our Mac list it is number 4.
Watch out for: You need to run and maintain your own server
Number 4 of 7 for Linux, rated 4.5/5. Communication is its main purpose in our directory. Runs on Linux, and also on Web, macOS, Windows, iOS and 1 more platform. On our Mac list it is number 5.
Watch out for: Free cloud plan only searches the latest 10,000 messages
Number 5 of 7 for Linux, rated 4.4/5. Communication is its main purpose in our directory. Runs on Linux, and also on Web, macOS, Windows, iOS and 1 more platform. Its listing says it is easy to pick up. On our Mac list it is number 6.
Watch out for: Fewer third-party integrations than Slack
Number 6 of 7 for Linux, rated 4.2/5. Communication is its main purpose in our directory. Runs on Linux, and also on Web, Windows, macOS, iOS and 1 more platform. Its listing says it is privacy-focused. On our Mac list it is number 9.
Watch out for: Self-managed only on the free plans, so you need technical setup
Number 7 of 7 for Linux, rated 4.3/5. Communication is its main purpose in our directory. Runs on Linux, and also on Web, Windows, macOS, iOS and 1 more platform. Its listing says it is privacy-focused. On our Mac list it is number 10.
Watch out for: Self-hosting needs technical setup
Running these on Linux
Counted from each pick's listing type and platforms.
- By listing type, the 7 Linux picks are 7 web apps (Discord, Slack, Mattermost, Zulip and 3 others).
- None of the 7 is listed as a native Linux app; they are web or cloud tools that are listed to run on Linux.
- Every Linux pick here also runs somewhere else. Discord reaches furthest, on 5 other platforms besides Linux.
- All 7 also run on Android, so the same tool can follow you between Linux and Android.
How this list compares
The same search on other platforms. Only the differences are named.
- Free communication apps for Mac
All 7 Linux picks also make the Mac top 10. In their place the Mac list has Loom, Microsoft Teams (free) and Xnapper; none of them is listed for Linux.
- Free communication apps for iPhone
6 of these 7 Linux picks also make the iPhone top 10; the one that does not is Element.
Frequently asked questions
- What is the best free communication app for Linux?
- Discord is our first pick. Free voice, video and text chat for communities, friends and small teams. Discord has a free plan, with paid plans that unlock more features or usage.
- Are these communication apps really free?
- Yes, every pick is free to start. Discord, Slack, Mattermost, Zulip and 3 others have free plans with paid upgrades.
- Which of these communication apps are open source?
- Mattermost, Zulip, Rocket.Chat and Element are tagged open source in our directory, so you can read the code of each and, depending on the licence, self-host or modify it.
- Which ones work offline on Linux?
- None of the picks here is listed as working offline, so expect to need an internet connection.
- Which are easiest for beginners?
- Discord, Slack and Pumble are rated beginner-friendly. 4 picks take more time to learn.
- How many free communication apps for Linux are in the directory?
- 7 match right now, and all of them are on this page. New tools are added as they are checked.
Keep exploring
Wider lists
Related free lists
- Free communication apps for Mac
- Free writing apps for Linux
- Free communication apps for iPhone
- Free AI productivity tools for Linux
- Free open-source communication apps for Mac
- Free automation tools for Linux
- Free open-source communication apps for Windows
- Free file management apps for Linux
- Free open-source communication apps for iPhone
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