ZulipPeople often tell us that traditional team chat tools (Slack, Microsoft Teams, etc.) feel chaotic and stressful. Zulip is designed around conversations that are labeled with topics, to make communication organized and efficient. It’s easy to get an overview of what conversations are happening, and to read one conversation at a time. Zulip’s threading model makes it so much easier to manage my team
Mattermostの開発に参加してみた記録 - Qiita
