Slack
Freemium
Slack is a cloud-based team collaboration tool.
Glip
Freemium
Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.
Matrix.org
Open Source
Matrix is an open protocol for real-time communication. It is designed to allow users with accounts at one communications service provider to communicate with…
Grape
Commercial
Grape is an REST-like API framework for Ruby. It's designed to run on Rack or complement existing web application frameworks such as Rails and Sinatra by prov…
Flowdock
Commercial
Flowdock is a group chat for teams which integrates with GitHub, Jira, Trello.
Hack Chat
Open Source
Hack Chat is a minimal, distraction-free chat application.
Discord
Free
Discord is a freeware proprietary VoIP application designed for gaming communities.
Mattermost
Open Source
Mattermost is an open source, private cloud Slack-alternative, Workplace messaging for web, PCs and phones. MIT-licensed.
TribeScale
Free
TribeScale is an All-in-One platform to coordinate your team around what really matters - communication, goals, decisions, tasks and results.
Zulip
Open Source
Zulip is a chat and collaborative software.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Compare Gitter with alternatives
Compare Dialog Messenger and Gitter and decide which is most suitable for you.