Alternatives to Mattermost for Self-hosting with any license

Element

A free instant messaging and collaboration software based on the Matrix protocol.
- Federated, bridged with many IRC networks. nrg200 • Jun 2017 • 2 agrees and 0 disagrees
Freemium $ $ $ Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted Matrix.org Cloudron
Decentralized End-to-End Encryption Group chat Federated ... Team Collaboration Federation Privacy-friendly Privacy focused Video calling Encrypted chat Video chat Voice Call Active Directory integration Add-ons Clean design Cross-platform Custom widgets Direct Messaging Encrypted Enterprise Group collaboration LDAP support Matrix.org protocol Message redaction Mobile friendly Moderation tools Per-room avatars Read receipts Real time collaboration Self-hosted search Text chat Typing notifications User Management User mentions Version history Video/Audio Calling Video Conferencing Voice chat Web-Based Web Integaration Chat Bot Community based DRM Free GitHub integration Integrated File Sharing MarkDown support File Sending Server Moderation Server side history Slack integration Video calling Voice chat Add a feature

371 Like
Matrix.org

Matrix defines a set of open APIs for decentralised communication, suitable for securely publishing, persisting and subscribing to data over a global open federation of...

Free Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted WebRTC Python JavaScript Go (Programming Language) Cloudron Java Perl
End-to-End Encryption Federation Decentralized Random video chat ... Voice Call Voice chat Chat Bot Distributed Encrypted chat Group chat Messaging Real time collaboration Server side history Team Collaboration WebRTC Add a feature

173 Like
Zulip

Zulip is a group chat app in which messages are threaded by topic, helping you have long-running, organized conversations. Zulip's threading makes it easy for people...
- Zulip does threaded conversations right, requiring every message to be in a thread and threads to be named. Like Mattermost, Zulip is also open source and can be self-hosted, but they also provide hosting, and for open source projects and research groups this hosting is free. hritcu • Jul 2020 • 1 agrees and 0 disagrees
- Also opensource and has the topics feature strifel • Aug 2020
- Zulip has more potential than Mattermost. Zulip is also an open source alternative to Slack but approached in a different manner. Sethu • Dec 2017 • 6 agrees and 0 disagrees
- Zulip's topics feature is great. vedarshshah • Dec 2017 • 5 agrees and 0 disagrees
- Powerful and user-friendly chat platform with extra productivity benefits of threaded conversation HaricharanSrinivasan • Dec 2017 • 3 agrees and 0 disagrees
Free Personal $ $ $ Open Source Mac Windows Linux Web Android ... iPhone Android Tablet BSD iPad Self-Hosted
Threaded Conversations Group collaboration Group chat Support for Hotkeys ... Third party integrations Chat Bot Chat organizer Community based GitHub integration Integrated File Sharing Live topics MarkDown support Secure Chat Team Collaboration Todos Add a feature

163 Like
Rocket.Chat

Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.

Freemium $ $ $ Open Source Mac Windows Linux Self-Hosted Cloudron
Channels Group chat Omnichannel messaging Video chat ... Ad-free Bots Telegram integration Video Conferencing Whatsapp integration Chat Bot Extensible by Plugins/Extensions Integrated File Sharing Location Mapping Share your screen Self-Serve Capability Slack integration Voice messages Add a feature

121 Like
fluxday

Opensource task & productivity management tool for startups, engineered based on the concepts of OKR. In fluxday, you can start by creating the departments of...

Free Open Source Web Self-Hosted
Task Management Add a feature

74 Like
Dialog Messenger

Dialog Messenger is a customized self-hosted platform usable across multi operation systems simultaneously. dialog provides SDK tools for client interface as well as for...

Free Personal Mac Windows Linux Web Android ... iPhone Self-Hosted Software as a Service (SaaS)
Encrypted chat Enterprise Messaging Messaging-sdk ... Reactions Real time collaboration Team work Text chat Video chat Voice chat Add a feature

31 Like
Spectrum Chat

A newly open sourced self hosted Slack like alternative for building persistent chat communities.

Free Open Source Mac Web Self-Hosted Software as a Service (SaaS)
Community management Group chat Channels Group collaboration ... Indexed search Support for @mentions Real time collaboration Team Collaboration Team work Threaded Conversations Add a feature

11 Like
Let's Chat

Self-hosted chat for small teams. Features and Stuff BYOS (bring your own server) Persistent messages Multiple rooms New message alerts /...
- 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.
Free Open Source Self-Hosted
Team Collaboration Web interface Add a feature

37 Like
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Crust Enterprise Messaging

The free and open-source Crust Messaging is a secure, high performance,Slack alternative that allows your teams to collaborate more efficiently, as well as communicate...

Free Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted
Channel manager Direct Messaging Group chat Integrated Chat ... Integrated File Sharing MarkDown support On-premises software Permission system Photo Sharing Plugin API Reactions Responsive design Team messaging Video calling Video chat Add a feature

32 Like
ZeroChat

An IRC-like internet chatroom hosted on ZeroNet, a distributed network. 0rc is a fully distributed website, and messages are shared through peers using the ZeroNet...

Free Open Source Mac Windows Linux Web Self-Hosted ... Python JavaScript ZeroNet
Decentralized Distributed Python Add a feature

11 Like

Active filters: self-hosted, clear and show all alternatives

Mattermost

Alternatives to Mattermost for Self-hosting with any license

Element

Matrix.org

Zulip

Rocket.Chat

fluxday

Dialog Messenger

Spectrum Chat

Let's Chat

Know any more alternatives to Mattermost?

Crust Enterprise Messaging

ZeroChat

Platforms

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