Rocket.Chat 是特性最丰富的 Slack 开源替代品之一，主要功能：群组聊天，直接通信，私聊群，桌面通知，媒体嵌入，链接预览，文件上传，语音/视频 聊天，截图等等。
Rocket.Chat 原生支持 Windows，Mac OS X ，Linux，iOS 和 Android 平台。Rocket.Chat 通过 hubot 集成了非常流行的服务，比如 GitHub，GitLab，Confluence，JIRA 等等。
Rocket.Chat 0.74.1 已发布，内容如下：
新特性
Limit all DDP/Websocket requests (configurable via admin panel) (#13311)
REST endpoint to forward livechat rooms (#13308)
Collect data for Monthly/Daily Active Users for a future dashboard (#11525)
Add parseUrls field to the apps message converter (#13248)
Bug 修复
Mobile view and re-enable E2E tests (#13322)
Hipchat Enterprise Importer not generating subscriptions (#13293)
Message updating by Apps (#13294)
REST endpoint for creating custom emojis (#13306)
Preview of image uploads were not working when apps framework is enable (#13303)
HipChat Enterprise importer fails when importing a large amount of messages (millions) (#13221)
Fix bug when user try recreate channel or group with same name and remove room from cache when user leaves room (#12341)