Mattermost on Twitter: "New: @GitLab color theme for GitLab Mattermost! https://t.co/XiVOG1CxG1 Thanks to mickael-kerjean for sharing! https://t.co/h5Edw6VQOJ" / Twitter
Mattermost: How to view list of files uploaded to a channel - Stack Overflow
Mattermost raises $50 million to advance its open source Slack alternative | VentureBeat