Slack
Freemium
Slack is a cloud-based team collaboration tool.
Discord
Free
Discord is a freeware proprietary VoIP application designed for gaming communities.
Glip
Freemium
Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.
Rocket.Chat
Open Source
Rocket.Chat free open source chat solution.
TribeScale
Free
TribeScale is an All-in-One platform to coordinate your team around what really matters - communication, goals, decisions, tasks and results.
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.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
Viber
Freemium
Viber Free Messenger and Phone Calls.
Jitsi
Open Source
Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.
fluxday
Open Source
fluxday is a user-friendly, free & opensource task & productivity management tool for growing startups.
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…
Flock
Freemium
Flock is a communication app for teams. Packed with tons of productivity features, Flock drives efficiency and boosts speed of execution.
Zulip
Open Source
Zulip is a chat and collaborative software.
Gitter
Freemium
Gitter is an open source instant messaging and chat room system for developers and users of GitHub repositories.
Compare Mattermost with alternatives
Compare Rocket.Chat and Mattermost and decide which is most suitable for you.
Compare Matrix.org and Mattermost and decide which is most suitable for you.
Compare TribeScale and Mattermost and decide which is most suitable for you.
Compare Dialog Messenger and Mattermost and decide which is most suitable for you.