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 Self-Hosted alternative is Mattermost, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Slack and many of them are available as a self-hosted solution so hopefully you can find a suitable replacement. Other interesting 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...

More about Slack

Slack alternatives page was last updated Jan 24, 2022

Mirotalk
Powered by WebRTC, Real-time video call, chat room and screen sharing entirely browser based.
51 Mirotalk alternatives
License model
- Free • Open Source
Application types
- Group Chat App
- Instant Messenger
Platforms
- Online
- Self-Hosted
Top Mirotalk Features
1. Screen Sharing
2. Desktop Sharing
3. Dark Mode
4. Privacy focused
5. End-to-End Encryption
6. Real time collaboration
7. VoiP Calls
8. No Tracking
9. Multiple Account support
10. Ad-free
11. No registration required
12. Voice Chat
Show all NaN Mirotalk features ▾
Mirotalk VS Slack
Is Mirotalk a good alternative to Slack?

eXo Platform
eXo Platform is an all-in-one digital workplace solution that helps you connect, align and engage your teams around a single interface. You can use it to improve company and peer-to-peer communication, boost collaboration and manage company knowledge.
95 eXo Platform alternatives
License model
- Free • Open Source
Application types
- Team Collaboration Tool
- Project Management Tool
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Software as a Service (SaaS)
+5
Top eXo Platform Features
1. Project Management
2. Team Collaboration
3. Document Management
4. Gamification
5. Real time collaboration
6. Full-Text Search
7. Recurring Tasks
8. Reminders
9. Shared Folders
10. Calendar View
11. Two-factor Authentication
12. Privacy focused
Show all NaN eXo Platform features ▾
eXo Platform VS Slack
Is eXo Platform a good alternative to Slack?

Twake
Twake is a real-time teamwork platform. It is a suite of collaborative tools that includes the specificities of some bestsellers (Slack, Trello, Google Drive...). We provide professional messaging, storage space, online collaborative editors (Words, Excel, PowerPoint), task...
125 Twake alternatives
License model
- Freemium • Open Source
Application types
- Team Collaboration Tool
- Task Management Tool
Platforms
- Mac
- Windows
- Linux
- Self-Hosted
Twake Features
Real time collaboration
Workspaces
Show all NaN Twake features ▾
+2
Twake VS Slack
Is Twake a good alternative to Slack?
Comments about Twake as an Alternative to Slack

Guest
I like Twake as an alternative to Slack because it is open-source.
Positive comment •Feb 17, 2021
1
- Almost everyone thinks Twake is a great Slack alternative.
- Twake is Freemium and Open SourceSlack is Freemium and Proprietary

Conduit Chat Server
Conduit is a simple, fast and reliable chat server powered by Matrix. Conduit is an alternative to Synapse and tries to be lightweight and easy to install, but it is still in development.
241 Conduit Chat Server alternatives
License model
- Free • Open Source
Application type
- Group Chat App
Platforms
- Online
- Self-Hosted
- Raspberry Pi
- Linux
- Debian
- Nix Package Manager
- Docker
- Docker Hub
Conduit Chat Server Features
1. Lightweight
2. Support for @mentions
3. Privacy focused
4. Rust
5. Matrix Protocol
6. Scalable
Show all NaN Conduit Chat Server features ▾
Conduit Chat Server VS Slack
Is Conduit Chat Server a good alternative to Slack?

Let's Chat
Self-hosted chat for small teams.
60 Let's Chat alternatives
License model
- Free • Open Source
Application type
- Team Collaboration Tool
Platforms
- Self-Hosted
Let's Chat Features
Web interface
Show all NaN Let's Chat features ▾
Discontinued
As stated at https://github.com/sdelements/lets-chat/issues/781 , the project is no longer developed since August 2017. Last version, 0.4.0, released in June 2015, can be still downloaded from GitHub together with the source code.
Let's Chat VS Slack
Is Let's Chat a good alternative to Slack?

cabal
Experimental p2p community chat platform.
15 cabal alternatives
License model
- Free • Open Source
Application types
- Group Chat App
- Encrypted Chat App
Platforms
- Mac
- Windows
- Linux
- Self-Hosted
cabal Features
1. Command line interface
2. Works Offline
3. Decentralized
4. Text chat
5. Channels
6. Peer-To-Peer
7. Serverless
Show all NaN cabal features ▾
cabal VS Slack
Is cabal a good alternative to Slack?

Kahla
Kahla is a free and open-source, cross-platform business messaging tool that supports end-to-end encrypted message communication and automatic destruction of messages.
16 Kahla alternatives
License model
- Free • Open Source
Application types
- Group Chat App
- Team Collaboration Tool
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- Chrome OS
- Android Tablet
- Self-Hosted
Kahla VS Slack
Is Kahla a good alternative to Slack?