Tailchat — Self-Hosted Open-Source Team Communication Platform

Introduction

Tailchat is an open-source team communication platform that combines the channel-based model of Discord and Slack with a self-hosted, plugin-extensible architecture. It supports groups, channels, direct messages, file sharing, and integrations through a modular plugin system.

What Tailchat Does

• Provides group-based channels for organized team conversations
• Supports direct messaging and multi-party private chats
• Delivers rich messages with Markdown, code blocks, mentions, and file attachments
• Extends functionality through a built-in plugin marketplace
• Offers bot and webhook APIs for third-party integrations

Architecture Overview

Tailchat is built with React (frontend) and Node.js with the Moleculer microservices framework (backend). Real-time messaging uses Socket.IO over WebSockets. Data is stored in MongoDB with file storage via MinIO or S3-compatible backends. The microservice architecture allows individual services (gateway, chat, file, user) to scale independently.

Self-Hosting & Configuration

• Deploy via Docker Compose with MongoDB and MinIO included
• Configure SMTP for email verification and password resets
• Set environment variables for database connection, S3 storage, and secret keys
• Plugins are installed from the admin panel or via the plugin registry
• Supports horizontal scaling by running multiple service instances behind a load balancer

Key Features

• Plugin architecture with 50+ official and community plugins
• Topic-based channels with threaded replies and pinned messages
• Integrated audio and video calls via plugin
• Rich text editor with Markdown, code highlighting, and emoji support
• Role-based access control with customizable permissions per group

Comparison with Similar Tools

• Rocket.Chat — more mature with broader enterprise features but heavier resource requirements
• Mattermost — Slack alternative focused on enterprise; less plugin flexibility than Tailchat
• Zulip — topic-threading model; stronger for async discussion but different UX paradigm
• Discord — feature-rich but closed-source and cloud-only
• Element (Matrix) — decentralized federation but more complex to self-host

FAQ

Q: What are the server requirements? A: Minimum 1 CPU, 2 GB RAM, and 10 GB disk for small teams. MongoDB and MinIO add to the footprint.

Q: Can I migrate from Slack or Discord? A: There is no built-in migration tool, but the API supports importing message history programmatically.

Q: Does Tailchat support federation? A: Not currently. Each Tailchat instance is independent. You can connect instances via bot integrations.

Q: Is there a mobile app? A: Yes. Tailchat provides a progressive web app (PWA) that works on mobile browsers, and native mobile apps are available.

Sources

• https://github.com/msgbyte/tailchat
• https://tailchat.msgbyte.com