[rig777]

I love mattermost and use it on the daily. I got it as a self hosted version of discord but I played around with the focalboard as well. Being a project manager I felt it held its own against many of other SaaS overpriced project boards like Monday.com. still needs some work though but I'd recommend it.

[hardwaresofton]

As far as chat mattermost does look like a very good Slack-alternative near-F/OSS alternative, but these days Matrix and Zulip are also very good. Did you happen to try those options/do a bakeoff?

As far as kanban/task management goes, Gitea/GitLab/GitHub feels like the right place these days (for software companies). Are there any reasons you prefer a standalone tool over putting the PM stuff a bit closer to the code?