Yes, the internal tool is called uChat and it's based on Mattermost but Uber heavily contributed to Mattermost to make it scale. More details here: https://eng.

Yes, the internal tool is called uChat and it's based on Mattermost but Uber heavily contributed to Mattermost to make it scale. More details here: https://eng.uber.com/uchat/ https://eng.uber.com/uchat/