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

Mattermost is modern communication from behind your firewall.

Zulip is powerful, open source team chat that combines the immediacy of real-time chat with the productivit...

Business and personal conversations secured with end‑to‑end encryption and protected by European privacy laws.

It is the fastest wiki and knowledge base for growing teams. Beautiful, feature rich, markdown compatible a...

Simple video chat with full end-to-end encryption. No accounts, nothing. Just a plain URL that is shared am...

It covers all of your organizational needs through a single platform - no need to deploy 5 different tools ...

More secure, more flexible, and completely free video conferencing. Go ahead, video chat with the whole tea...

It is a free, open source note taking and to-do application, which can handle a large number of notes organ...

It is a Trello-like kanban board built with React and Redux. It is a free and open source kanban board for ...

It is an open source, self-hosted alternative to Trello, Notion, and Asana. It helps define, organize, tra...

It is a free open source software compatible to discord. It is a selfhostable Chat, Voice and Video platfor...

It is an open-source alternative to Discord. It is a user-first chat platform built with modern web technol...

It is an open-source alternative to Notion. You are in charge of your data and customizations. Built with F...