Open Source Self-Hosted Slack Alternatives

Slack is not available as a self-hosted solution but there are plenty of alternatives for power users and business that want to host a solution on-premise. The best open source Self-Hosted alternative is Mattermost. If that doesn't suit you, our users have ranked more than 100 alternatives to Slack and many of them are open source and available as a self-hosted solution so hopefully you can find a suitable replacement. Other interesting open source Self-Hosted alternatives to Slack are Element, Zulip, Rocket.Chat and Matrix.org.

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Slack alternatives are mainly Group Chat Apps but may also be Instant Messengers or Encrypted Chat Apps. Other popular filters includes Self-Hosted + Open Source. Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Slack.

Slack

851

Group Chat App
Freemium • Proprietary

Slack is a unified communication platform built with an optimized workflow to keep modern teams focused and productive. A familiar chat interface facilitates discussions while advanced features are easily exposed based on...

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Slack alternatives page was last updated Jul 8, 2024

Glowing Bear
Glowing Bear is a sleek, modern web frontend that securely connects to a running instance of WeeChat using its built-in relay protocol. It relies on WeeChat to do all the heavy lifting and then pro...
45 Glowing Bear alternatives
License model
- Free • Open Source
Application type
- IRC Client
Platforms
- Online
- Self-Hosted
- Google Chrome
- WeeChat
Glowing Bear Features
Web-Based
IRC
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Glowing Bear VS Slack
Is Glowing Bear a good alternative to Slack?

WorkLand
WorkLand is a metaverse for tech teams. Team members can gather in WorkLand, manage projects, track tasks and get work done. WorkLand also features a break room.
31 WorkLand alternatives
License model
- Free • Open Source
Application types
- Team Collaboration Tool
- Group Chat App
Platforms
- Online
- Self-Hosted
WorkLand Features
Video Conferencing
Remote Work
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+2
WorkLand VS Slack
Is WorkLand a good alternative to Slack?

ArrowChat
ArrowChat is a self-hosted live chat software based on PHP script and jQuery. It is placed at the bottom of your website similar to Facebook Messenger . The chat integrates right into yo...
44 ArrowChat alternatives
License model
- Paid • Open Source
Platforms
- Online
- Android
- iPhone
- Self-Hosted
ArrowChat Features
1. WordPress Integration
2. Embeddable
3. Multiple languages
4. Voice Chat
5. BuddyPress Integration
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ArrowChat VS Slack
Is ArrowChat a good alternative to Slack?

Braid Chat
Braid is a new kind of group collaboration tool, designed for teams that hate interruptions and just want to get shit done.

Say goodbye to chatrooms, and say hello to Braid!.
13 Braid Chat alternatives
License model
- Free • Open Source
Platforms
- Online
- Self-Hosted
Braid Chat VS Slack
Is Braid Chat a good alternative to Slack?

Strafe Chat
StrafeChat is a web application focused on no censorship. We believe that people with any belief, opinion, or view should be able to communicate with each other freely.
14 Strafe Chat alternatives
License model
- Free • Open Source
Application types
- Group Chat App
- Instant Messenger
Platforms
- Online
- Self-Hosted
Top Strafe Chat Features
1. Ad-free
2. Privacy focused
3. No Tracking
4. Lightweight
5. Dark Mode
6. Two-factor Authentication
7. End-to-End Encryption
8. Support for @mentions
9. Support for MarkDown
10. Support for Themes
11. VoiP Calls
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Strafe Chat VS Slack
Is Strafe Chat a good alternative to Slack?

Modular.im
Awesome hosting for Matrix chat and integrations - built on the Matrix open ecosystem for secure, decentralised communication, by the creators of Matrix.
11 Modular.im alternatives
License model
- Paid • Open Source
Application types
- Video Calling App
- Encrypted Chat App
Platforms
- Online
- Self-Hosted
Modular.im Features
1. VoiP Calls
2. Support for MarkDown
3. DRM Free
4. Decentralized
5. Community-based
6. File Sending
7. Custom widgets
8. IRC
9. Server side history
10. Matrix Protocol
Show all NaN Modular.im features ▾
Modular.im VS Slack
Is Modular.im a good alternative to Slack?

qTeams
The future of Team collaboration. Secure. Cross platform. Manage Teams, Groups, Private & Public Channels. Invite. Meet. Work. Automate with over 700'000 Apps. Built-in Webinar & Webmeetings. Available as Pr...
36 qTeams alternatives
License model
- Paid • Open Source
Application types
- Group Chat App
- Web Conferencing Tool
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Software as a Service (SaaS)
+7
qTeams Features
1. Screen Sharing
2. Gitlab integration
3. GitHub Integration
4. Team work
5. LDAP support
6. Video Conferencing
7. Audio Conferencing
8. Webinar
Show all NaN qTeams features ▾
qTeams VS Slack
Is qTeams a good alternative to Slack?