Rocket.Chat

Born as a side project of four friends in 2015, ‍Rocket.Chat is the world's largest open source communications platform. Built for organizations that need more control over their communications, it enables collaboration between colleagues, partners, customers, communities, and even platforms without compromises on data ownership, customizations, or integrations.

Tens of millions of users in over 150 countries and organizations such as Deutsche Bahn, the U.S. Navy and Credit Suisse trust Rocket.Chat every day to keep their communications completely private and secure.