Slack brings all your communication together in one place

Messaging for people who make software. Integrated with your team, projects and your code.

Open source slack alternative

Open-source, self-hosted, Slack alternative

Powerful open source team chat

Chat-based workspace in Office 365

Flowdock is your team's chat with a shared inbox. Teams using Flowdock react in seconds and never forget anything.

A messaging platform built for teams

Group messaging & video meetings for teams, from Atlassian

Open source team messaging application with apps for Android, iOS, and Web

A faster way for your team to communicate

Slack for the whole world, except end-to-end encrypted across all your devices

Your own business messenger.

Team collaboration with real time chat.

Real-time business chat & texting for teams

Open source self-hosted chat app for small teams

Slack without the annoying distractions

Like Slack except P2P, offline friendly, and open source

A modern and Open Source Web client for XMPP

Chat interoperability-as-a-service

A small alternative to Slack