Rocket.Chat is an open-source team collaboration platform by Rocket.Chat Ltd. It offers self-hosted messaging, voice/video calls, and integrations for teams. The software can run on-premises, in private clouds or as SaaS to meet various security needs. It is used by organizations requiring stringent data privacy (including governments and healthcare). Rocket.Chat supports extensive customization (white-labeling) and can connect with other messaging apps. The company highlights its patented security controls and use in high-security contexts, as well as features like federation and external user collaboration for complex deployments.