Team Chat
Open and self-hostable team chat platforms with bot and plugin APIs.
JSON: /api/v1/directory.json (filter on category=team-chat)
Rocket.Chat
Messaging, voice, video, apps, and AI that connect you with allies and partners on any system. Deployed anywhere, entirely under your control.
See siteSee docsMattermost
Zero-trust collaboration, automation and AI in private cloud, self-hosted, and air-gapped environments. Built for national security, critical infrastructure, and regulated enterprises.
See siteSee docsZulip
Zulip server and web application. Open-source team chat that helps teams stay productive and focused.
FreeNo authRocket.Chat Mobile
The Secure CommsOS™ for mission-critical operations
FreeNo authRocket.Chat Apps Engine
The Rocket.Chat Apps engine and definitions.
FreeNo authMattermost Plugin API
A hackathon project to explore reworking the Mattermost Plugin API.
FreeNo authGlip by RingCentral
AI-powered messaging for seamless collaboration for every team. Chat, video, file sharing, and task management in one platform. Try it for free.
See siteSee docsMattermost API
REST API v4 — first-class per-endpoint pages generated from the canonical OpenAPI specification.
See siteSee docsDiscord API
Bots and apps for Discord.
FreeAPI keyZulip API
REST API for Zulip topics and streams.
FreeAPI keyRevolt
Open-source Discord-like chat platform.
FreeAPI keyCampfire
Self-hosted group chat from 37signals.
FreeNo authSpike
Email and chat workspace.
Free tierNo authFlock
Team chat with developer platform.
Free tierOAuthChanty
Team chat for small teams.
Free tierNo authTwist
Async team communication from Doist.
Free tierOAuth