Open source Mattermost alternatives

All Mattermost alternatives

1. 

   

   Rocket.Chat

   4.4(3.7K) · App StoreLike

   Rocket.Chat is an open-source communications platform that can be self-hosted or used as a cloud service. Besides team channels, threads, direct messages and calls, it includes an omnichannel module that routes website chat, email and messaging apps to support agents. Its marketplace and APIs let organizations customize it heavily, and self-hosting suits teams with strict data residency needs.

   9 Rocket.Chat alternatives

   Pros

   • Omnichannel module routes website chat, email and messaging apps
   • Self-hostable open source platform for strict data residency needs
   • Marketplace and APIs allow deep customization

   Cons

   • Self-hosted setups require regular maintenance and upgrades
   • Some features are reserved for paid editions
   • The wide range of settings makes administration complex

   Cost / License

   FreemiumOpen source

   Categories

   Team ChatCustomer Support & Live Chat

   Platforms

   WebWindowsMacLinuxiPhoneAndroidSelf-hosted

   Features

   API accessChannelsIntegrationsLive chat widgetThreaded conversationsVoice and video calls

   Visit websiteMore about Rocket.Chat
2. 

   

   Zulip

   26KstarsLike

   Zulip is an open-source team chat app whose threading model files every channel message under a named topic, so people can catch up on several discussions without losing context. It supports Markdown, code blocks and LaTeX math, and integrates with common developer tools. It can be self-hosted for free or used through Zulip Cloud, which suits open-source projects, research groups and remote teams.

   8 Zulip alternatives

   Pros

   • Topic-based threading makes catching up on discussions easy
   • Markdown, code blocks and LaTeX suit technical teams
   • Free to self-host under an open source license

   Cons

   • The topic model takes some getting used to after Slack
   • Video calls rely on external services such as Jitsi or Zoom

   Cost / License

   FreemiumOpen source

   Categories

   Team Chat

   Platforms

   WebWindowsMacLinuxiPhoneAndroidSelf-hosted

   Features

   API accessChannelsIntegrationsMarkdown supportThreaded conversations

   Visit websiteMore about Zulip
3. 

   

   Element

   3.3(590) · App StoreLike

   Element is a messaging app from the team that created Matrix, an open standard for decentralized, federated chat. Rooms, direct messages and calls are end-to-end encrypted, and people on different Matrix servers can talk to each other like email. Individuals can join a public server for free, while organizations and governments self-host or buy Element's enterprise server suite, with bridges to other chat networks.

   12 Element alternatives

   Pros

   • End-to-end encryption by default for private rooms and messages
   • Federated Matrix network, so no single company controls your chats
   • Open source and self-hostable, popular with public sector bodies

   Cons

   • Encryption keys and device verification can confuse newcomers
   • Running your own Matrix server takes real technical effort
   • Fewer business integrations than mainstream team chat apps

   Cost / License

   FreemiumOpen source

   Categories

   Team ChatMessaging Apps

   Platforms

   WebWindowsMacLinuxiPhoneAndroidSelf-hosted

   Features

   ChannelsEnd-to-end encryptionNo phone number requiredThreaded conversationsVoice and video calls

   Visit websiteMore about Element