Best API Chat & Communication for self-hosting

Open-source customer engagement and live-chat platform

Replaces Intercom, Zendesk

Real-time collaborative document editor

Replaces Google Docs

Scalable real-time messaging server for apps and websites

Replaces Pusher, Firebase Realtime Database

Open-source live chat and customer messaging

Replaces Intercom, Drift

Web-based helpdesk and customer support system

Replaces Zendesk, Freshdesk

Self-hostable WebSocket server compatible with Pusher

Replaces Pusher

Scalable software telephony platform

Replaces Twilio, Asterisk

Free self-hosted help desk and shared inbox

Replaces Help Scout, Zendesk

Self-hosted local Telegram Bot API server

Open-source framework for building telephony systems

Replaces Avaya, Cisco Unified Communications

Real-time WebSocket server for in-app messaging

Replaces Pusher, Ably

Self-hostable, open-source Discord-compatible chat backend

Replaces Discord

Matrix-Telegram puppeting bridge

Replaces Telegram official client

Collection of Matrix bridges for popular chat networks

Replaces Beeper

Multi-tenant web GUI for FreeSWITCH

Replaces 3CX, RingCentral

Command-line tool for sending and receiving Matrix messages

Replaces Slack CLI

Matrix bridge for GitHub, GitLab, Jira and webhooks

Replaces Slack

XMPP library for building bots and chat extensions

Replaces Slack apps

Self-hosted backend for syncing Ferdium settings

Replaces Franz Server

Self-hosted AI assistant bot for Matrix rooms

Replaces Slack AI assistants

Standalone media storage for Matrix homeservers

Replaces Slack file storage