Communication & Chat
Replaces: WhatsApp, Slack, Teams
Encrypted and privacy-friendly messengers and chat platforms. Secure alternatives to WhatsApp, Slack and Microsoft Teams.
Element/Matrix
Decentralized messenger with end-to-end encryption based on Matrix
Signal
The gold standard for secure private communication
XMPP/Prosody
Open messaging protocol with the lightweight Prosody server
Rocket.Chat
Versatile team communication platform with extensive integrations
Mattermost
Secure Slack alternative for enterprises and DevOps teams
Zulip
Team chat with a unique threading model for productive communication
Jami
Decentralized peer-to-peer messenger without central servers
Briar
Secure messenger for activists and journalists with Tor support
Colanode
Open-source and local-first Slack and Notion alternative that puts you in control of your data
Sharkord
Lightweight, self-hosted, open-source chat server with voice, video, text, and screen sharing.