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 Linux Web Android iPhone iPad ... Self-Hosted Chrome Safari F-Droid Firefox End-to-end encryption Decentralized Group chat Matrix.org protocol ... Voice Call Built-in File transfer Encrypted chat GitHub integration Group collaboration Server Moderation Server side history Slack integration Team Collaboration Video calling Add a feature 156 Like Supports all Hangouts features, as well as encrypted conversations. Respects your privacy, and you don't need an email address to sign up. Guest • Jan 2018 Disagree Agree
Mattermost Mattermost is an open source, self-hosted Slack alternative. As an alternative to proprietary SaaS messaging, Mattermost brings... Free Open Source Mac OS X Windows Linux Android iPhone ... Android Tablet iPad Self-Hosted JavaScript Go (Programming Language) Cloudron Team Collaboration Data API Group chat Integrated File Sharing ... MarkDown support On-premises software Plugin API Slack integration Add a feature 119 Like
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 74 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 111 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
Tinode Open source instant messaging server and clients. Backend in pure Go (license GPL 3.0), client-side binding in Java for Android and Javascript (license Apache 2.0)... Free Open Source Web Android Self-Hosted Ad-free Group chat Real time collaboration Add a feature 2 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 2 Like
NextCloud Talk Screensharing, online meetings & web conferencing made easy. Requires Nextcloud instance. Free Personal Open Source Web Android iPhone iPad Self-Hosted End-to-end encryption Share your screen Add a feature 1 Like
TrueConf Free software on-premises video conferencing server with strong UC capabilities and native apps for all major platforms. Freemium Mac OS X Windows Linux Web Android ... iPhone iPad Self-Hosted Apple Watch Share your screen Video calling Add a feature 4 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 2 Like
Weavy Collaboration Framework Embed contextual collaboration tools for unlimited users right into the web apps and sites you have built or already use. Commercial Web Android iPhone Self-Hosted Chrome ... Microsoft SharePoint Direct Messaging Document tracking Embeddable File-search ... Group chat Group collaboration Integrated File Sharing Meeting notes On-premises software Real time collaboration Share files Tasks managment Team Collaboration Unlimited users Voice Call Add a feature 1 Like
Intraboom Intraboom is a simple, all-in-one digital workplace that makes communicating and collaborating with your team more efficient for your internal and external projects. And... Freemium $ $ $ Android iPhone Self-Hosted Group chat Real time collaboration Tasks managment Team Collaboration Add a feature 1 Like
