Zulip

Zulip is an open-source team chat platform that offers threaded conversations for efficient and organized communication. It serves as a reliable tool for internal communication within companies, enabling team members to collaborate effectively. With its threading model, Zulip simplifies the management of teams and promotes seamless information flow. The software has gained recognition and positive reviews from various sources, including Atolio, a business that considers Zulip crucial to its daily operations. Zulip is also praised by End Point for being the top choice for internal communication. It caters to teams of all sizes, including Fortune 500 companies and open-source communities.

https://zulip.com/