Wikimedia (維基百科後面的基金會) 又多了一個溝通工具：「Introducing Wikimedia Chat!」。
最傳統的方式是在 wiki 的 Talk 頁上溝通 (現在看起來還是有些正式的投票討論需要走這個方式)，但那個界面用起來真的頗痛苦... 一般的社群討論還是會在其他工具上進行。
先前有晃進去看過的平台應該是 IRC 與 Telegram 群組，不過後來因為量太大就閃出來了，另外這邊有提到 Slack、Discord 與 Facebook：
You can now see Wikimedia-related discussion groups in Slack, Discord, Telegram, Facebook, and many more.
這些平台都還是放在外部，就會有很多隱私上的考量：
Besides being scattered and inaccessible to people who don’t have accounts in those platforms (for privacy reasons for example), these platforms use proprietary and closed-source software, are outside Wikimedia infrastructure and some harvest our personal data for profit.
freenode 上面的 IRC 算是相對起來比較開放，但還是少了不少功能，所以就自己架了 Mattermost 出來：
IRC on freenode.net is a good alternative but it lacks basic functionalities of a modern chat platform. So we created Wikimedia Chat, a Mattermost instance hosted in Wikimedia Cloud.
比較特別的是超過 90 天的記錄會被砍掉？不太懂這邊的邏輯...
As a Wikimedia Cloud project, all of discussions, private and public are covered by Code of conduct in technical spaces and due to Wikimedia Cloud privacy policy all discussions older than ninety days will be deleted.