Stream Chat vs. Rocket.Chat

Stream Chat is a messaging API and SDK suite for developers building in-app chat. Teams integrate it to ship production messaging in weeks instead of building and maintaining real-time infrastructure in-house. Client SDKs cover React, Swift, Android, Flutter, React Native, Angular, JavaScript, Unity, and Unreal, each with a UI kit you can customize or replace entirely. The backend runs on Go and RocksDB across 12 global edge locations, holding sub-40ms latency and 5M concurrent connections in a single channel behind a 99.999% uptime SLA.

Trusted by the world's most critical organizations, Rocket.Chat Secure CommsOS® is built for high-consequence environments to deliver decision advantage: the ability to work together, verify access continuously, and keep every action auditable across agencies, borders, classification levels, and connected systems. It federates natively across protocols like Matrix and XMPP, so partners never have to adopt your system to work with you. Deploy anywhere — self-hosted, air-gapped, or in a sovereign cloud — for chat, voice, video, and governed AI agents, entirely under your control.