Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.

Mattermost is an open source, private cloud Slack-alternative, Workplace messaging for web, PCs and phones. MIT-licensed.

Riot allows teams to communicate across a wide range of collaboration apps.

Qiscus provide everything you need to power up your app with chats.

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…

TeamSpeak is software for quality voice communication via the Internet.

HipChat is a web service for internal private online chat and instant messaging.

appear.in provides one-click video conferences right in your browser without requiring PIN codes or additional software.

TribeScale is an All-in-One platform to coordinate your team around what really matters - communication, goals, decisions, tasks and results.