https://cloud.tencent.com/developer/news/359996

    Zulip是一款功能强大的开源群聊应用程序，它结合了实时聊天的即时性和线程对话的生产力优势。Zulip作为开源项目，被很多财富500强公司、大型标准组织以及其他需要实时聊天系统的用户使用，该系统允许用户每天轻松处理数百或数千条消息。Zulip拥有超过300名贡献者，每月合并超过500次提交，也是规模最大，发展最快的开源群聊项目。

    https://github.com/zulip/zulip/
    Zulip is a powerful, open source group chat application that combines the immediacy of real-time chat with the productivity benefits of threaded conversations. Zulip is used by open source projects, Fortune 500 companies, large standards bodies, and others who need a real-time chat system that allows users to easily process hundreds or thousands of messages a day. With over 700 contributors merging over 500 commits a month, Zulip is also the largest and fastest growing open source group chat project.