A secure, end-to-end encrypted Swiss instant messenger with a focus on privacy.

experts

WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.

experts free

Mattermost is an open source alternative to Slack.

experts Open Source

Don't bother with chat apps that don't respect your privacy. Revolt is a brand new chat platform designed around you.

experts Open Source

Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.

experts Open Source