Rocket.Chat is the open-source alternative to Slack that gives organizations complete control over their communication data. Founded in 2015 by Gabriel Engel in Porto Alegre, Brazil, it started as a Meteor.js project and grew into one of the most popular open-source communication platforms, with over 12 million users across 150+ countries.
The platform offers team messaging, video and audio conferencing, file sharing, and a rich set of integrations. What sets it apart is the combination of Slack-like features with full self-hosting capability. Organizations can run Rocket.Chat on their own servers, in private clouds, or air-gapped environments — critical for industries with strict compliance requirements.
Rocket.Chat has found strong adoption in government, defense, healthcare, and education sectors. The platform has achieved various security certifications and complies with HIPAA, GDPR, and other regulatory frameworks. The ability to deploy on-premises and maintain complete data sovereignty is the primary selling point for these customers.
One of Rocket.Chat’s strongest features is its omnichannel capability. Organizations can route customer conversations from WhatsApp, Instagram, Facebook Messenger, email, SMS, and website live chat into a single Rocket.Chat workspace. This makes it useful not just for internal communication but also as a customer service platform.
The company has raised over $30 million in funding and offers a freemium model — the community edition is free and open source, while the enterprise edition adds features like advanced access controls, high availability, and premium support. The marketplace includes hundreds of apps and integrations.
Rocket.Chat has integrated AI features including chatbot creation tools, AI-powered message summarization, and auto-translation. The project has a vibrant open-source community, and its codebase on GitHub has attracted thousands of contributors. Being built in Brazil, it’s also a notable success story for Latin American open-source software.
