Matrix : Matrix is an open standard for decentralised communication, providing simple HTTP APIs and open source reference implementations for securely distribu...
Zulip : Zulip is a powerful, open source group chat application that combines the immediacy of real-time chat with the productivity benefits of threaded conve...
Taiga.Io : Taiga is a project management platform for startups and agile developers & designers who want a simple, beautiful tool that makes work truly enjoyable...
Basecamp : Basecamp is a web-based project management tool. Its primary features are to-do lists, milestone management, forum-like messaging, file sharing, and t...
Imagine all your team communication in one place, instantly searchable, available wherever you go. That's Slack.