Riot.im Riot (formerly Vector) is an opensource interoperable app running on Web, iOS and Android. It is built around chat rooms, both public and private and provides messaging... Free Open Source Mac Windows Linux Web Android ... iPhone iPad Self-Hosted Chrome Safari F-Droid Firefox End-to-end encryption Decentralized Group chat Matrix.org protocol ... Video calling Voice Call Built-in File transfer Community based Custom widgets DRM Free Encrypted chat GitHub integration Group collaboration Send files Server Moderation Server side history Slack integration Team Collaboration Video calling Add a feature 165 Like Federated, bridged with many IRC networks. nrg200 • Jun 2017 Disagree Agree
Matrix.org Matrix is an open standard for decentralized persistent communication over IP. It can be used for decentralised group chat, WebRTC signaling, IoT-data transfer, ... Free Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted WebRTC Python JavaScript Go (Programming Language) Java Perl End-to-end encryption Decentralized Chat Bot Distributed ... Encrypted chat GNU/linux-libre Group chat Real time collaboration Server side history Team Collaboration WebRTC Add a feature 81 Like
Zulip Zulip is a group chat app. Its most distinctive characteristic is that messages are threaded by topic, helping you have long-running, organized conversations.... Free Open Source Mac Windows Linux Web Android ... iPhone Android Tablet BSD Self-Hosted Threaded Conversations Group collaboration Chat Bot Community based ... GitHub integration Group chat Integrated File Sharing MarkDown support Team Collaboration Add a feature 116 Like Powerful and user-friendly chat platform with extra productivity benefits of threaded conversation HaricharanSrinivasan • Dec 2017 Disagree Agree Zulip has more potential than Mattermost. Zulip is also an open source alternative to Slack but approached in a different manner. Sethu • Dec 2017 Disagree Agree
Rocket.Chat Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework. Free Open Source Mac Windows Linux Android iPhone ... Self-Hosted Cloudron Ad-free Chat Bot Extensible by Plugins/Extensions Group chat ... Integrated File Sharing Location Mapping Share your screen Voice messages Add a feature 72 Like
HipChat HipChat is an instant messaging service designed for companies and teams. It has persistent chat rooms, one-to-one chat, searchable chat history, file sharing via drag... Freemium Mac OS X Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted Apple Watch Team Collaboration Integrated File Sharing Share your screen Add a feature 73 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 /... Free Open Source Self-Hosted Cloudron Team Collaboration Add a feature 36 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 MySQL Community Edition Self-Hosted MariaDB Ruby Self-hosted Feature Add a feature 69 Like
Hack Chat hack.chat is a minimal, distraction-free chat application. Channels are created and joined by going to https://hack.chat/?your-channel . There are no channel lists, so a... Free Open Source Web Android Self-Hosted Distraction-free UI Add a feature 20 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 OS X Windows Linux Web Android ... iPhone Self-Hosted Encrypted chat Privacy protection Reactions Real time collaboration ... Team work Text chat Add a feature 24 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 Add a feature 7 Like
VideoMeeting VideoMeeting is a free and open source video conference solution built to have video calls and chats using your web browser. It is a pure web application based on WebRTC... Free Open Source Web Chrome OS Self-Hosted Video calling Add a feature 4 Like
TribeScale TribeScale is a startup that aims to enhance teamwork in companies through the improvement of communication, coordination, and the pace on the basis of targets set. Free Mac OS X Windows Web Android iPhone ... iPad Self-Hosted Goal setting Goal Tracking Group chat Group collaboration ... Real time collaboration Team Collaboration Team work Add a feature 24 Like
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... Free Open Source Mac OS X Windows Linux Web Android ... Android Tablet Self-Hosted Chrome WeeChat Firefox OS Google Play Store Firefox Responsive design Add a feature 3 Like
Spectrum Chat A newly open sourced self hosted Slack like alternative for building persistent chat communities. Freemium $ $ $ Open Source Web Self-Hosted Group chat Group collaboration Support for @mentions Real time collaboration ... Team Collaboration Team work Add a feature 4 Like
Total.js Messenger Total.js Messenger is a small alternative to Slack built on Node.js and total.js . Freemium Open Source Self-Hosted total.js Node.JS Team Collaboration Add a feature 3 Like
