Easiest Chat & Communication to self-host

Mumble

Chat & Communication

Low-latency, high-quality voice chat application

Replaces Discord, TeamSpeak

The Lounge

Chat & Communication

Modern, self-hosted web IRC client

Replaces IRCCloud, Slack

Privacy-focused lightweight commenting engine

Replaces Disqus

Ferdium

Chat & Communication

All-in-one messenger that combines chat services

Replaces Rambox, Station

Lightweight self-hosted commenting server

Replaces Disqus

MiroTalk

Chat & Communication

Free WebRTC video conferencing and meeting rooms

Replaces Zoom, Google Meet

Lightweight videoconferencing server

Replaces Zoom, Google Meet

Self-hosted backend for syncing Ferdium settings

Replaces Franz Server

Rustpad

Chat & Communication

Minimal collaborative real-time text editor

Replaces Google Docs, Etherpad

Self-hostable WebSocket server compatible with Pusher

Replaces Pusher

Comentario

Chat & Communication

Privacy-friendly, self-hosted web comments engine

Replaces Disqus

Screen sharing for developers

Feature-rich event management system

Replaces Zoho Backstage

Messaging platform operating without user identifiers

Lightweight Unix IRC server that is easy to configure

Replaces Slack

Server for unified push support in Molly chat application

Command-line tool for sending and receiving Matrix messages

Replaces Slack CLI

Peer-calls

Chat & Communication

Group peer to peer video calls for everyone

Replaces BigBlueButton, Skype

Secure Scuttlebutt room server

Simple, lightweight web-based IRC client

Replaces IRCCloud

Simple and efficient mailing list manager