Slack
Freemium
Slack is a cloud-based team collaboration tool.
Mattermost
Open Source
Mattermost is an open source, private cloud Slack-alternative, Workplace messaging for web, PCs and phones. MIT-licensed.
Whaller
Freemium
Whaller allows teams and organizations to create their own internal social networks, meaning no adverts and no data exploitation.
TribeScale
Free
TribeScale is an All-in-One platform to coordinate your team around what really matters - communication, goals, decisions, tasks and results.
Fleep
Freemium
Fleep enables communication within and across organizations, be it your team chats, project communication or 1:1 conversations.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Hack Chat
Open Source
Hack Chat is a minimal, distraction-free chat application.
Glip
Freemium
Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.
Bitrix24
Freemium
Bitrix24 is a free (for small businesses) social enterprise platform.
Hibox
Freemium
Hibox provides task management, business chat and video calls.
Flock
Freemium
Flock is a communication app for teams. Packed with tons of productivity features, Flock drives efficiency and boosts speed of execution.
Flowdock
Commercial
Flowdock is a group chat for teams which integrates with GitHub, Jira, Trello.
Gitter
Freemium
Gitter is an open source instant messaging and chat room system for developers and users of GitHub repositories.
Compare Grape with alternatives
Compare Dialog Messenger and Grape and decide which is most suitable for you.