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…
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
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.
Compare Gitter with alternatives
Compare Dialog Messenger and Gitter and decide which is most suitable for you.