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open-im-server

Open-im-server is an open-source instant messaging platform built with Go that enables developers to integrate complete chat functionality into their applications. Unlike standalone chat apps, it provides a comprehensive microservices architecture with SDKs and REST APIs to support massive scale with millions of users and billions of messages.

Key Features

• Microservices Architecture: Cluster-ready design with gateway and multiple RPC services for scalability
• Flexible Deployment: Support for source code, Docker, and Kubernetes deployment options
• Massive Scale Support: Handles large groups with hundreds of thousands of users and billions of messages
• REST API and Webhooks: Business system integration through REST APIs and event-based callbacks
• Cross-Platform SDK: Go-based SDK with local storage, connection management, and listener callbacks

Use Cases

• In-App Messaging: Add real-time chat capabilities to existing applications and platforms
• Enterprise Communication: Deploy private instant messaging solutions for internal team collaboration
• Community Platforms: Power group messaging and user management for community-based applications

Who Is It For

Open-im-server is designed for developers and organizations seeking to build or deploy instant messaging solutions. It's ideal for those who want to integrate messaging capabilities into their applications or need a self-hosted alternative to commercial chat platforms.