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 Jul 8, 2024

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
Show all NaN Strafe Chat features ▾
Strafe Chat VS Slack
Is Strafe Chat a good alternative to Slack?

Output Messenger
Private and Secure Instant Messenger for Office designed specifically for keeping remote employees and multiple offices in sync.

"Give your team the freedom to chat, talk, share and interact together from anywhere, on any devices" by using it.
69 Output Messenger alternatives
License model
- Paid • Proprietary
Application types
- Group Chat App
- Instant Messenger
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Self-Hosted
Output Messenger Features
Screen Sharing
Voice Chat
Integrated File Sharing
Integrated Chat
Show all NaN Output Messenger features ▾
+7
Output Messenger VS Slack
Is Output Messenger a good alternative to Slack?

ARKNet
A decentralized fault-tolerant platform for corporate interaction within companies and for private communication with clients.
30 ARKNet alternatives
License model
- Paid • Proprietary
Application type
- Encrypted Chat App
Platforms
- Windows
- Self-Hosted
+8
ARKNet Features
1. Decentralized
2. AES-256 Encryption
3. VoiP Calls
4. End-to-End Encryption
5. Private messaging
6. Encrypted VPN
7. P2P Network
8. Peer-To-Peer
9. Private Chat
10. Data Protection
Show all NaN ARKNet features ▾
ARKNet VS Slack
Is ARKNet a good alternative to Slack?

TrueConf
TrueConf Server is used by 5000 companies around the world connecting thousands of workplaces and conference rooms. The server is specially designed to work in your corporate network. Deploying TrueConf Server takes only 15 minutes!
123 TrueConf alternatives
+3
License model
- Freemium • Proprietary
Application types
- Video Calling App
- Instant Messenger
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Apple Watch
TrueConf Features
1. Screen Sharing
2. On-premises software
3. WebRTC
4. Video Conferencing
5. Unified communications
Show all NaN TrueConf features ▾
TrueConf VS Slack
Is TrueConf a good alternative to Slack?

Zangi Business Solutions
Zangi for Business is a secure communication platform that offers top-level security technologies to ensure data security.
25 Zangi Business Solutions alternatives
License model
- Paid • Proprietary
Application types
- Group Chat App
- Team Collaboration Tool
Platforms
- Mac
- Windows
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Software as a Service (SaaS)
+6
Zangi Business Solutions Features
1. Self-publishing
2. Team management
3. Team work
4. Team Messaging
5. White-labeled
Show all NaN Zangi Business Solutions features ▾
Zangi Business Solutions VS Slack
Is this 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?

Milo
Milo is a mobile-first, private, cloud-based community engagement platform tailor-made to help businesses run their communities like never before.
13 Milo alternatives
+3
License model
- Paid • Proprietary
Application type
- Team Collaboration Tool
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Software as a Service (SaaS)
Milo Features
1. Real time collaboration
2. Community events
3. Meet new people
4. Private Community
5. Discussion section
6. Community-based
7. Community management
Show all NaN Milo features ▾
Milo VS Slack
Is Milo a good alternative to Slack?