[nfd]

Slack may have a working IRC bridge, but it still has a closed-source server. You're still trusting a third-party with all your data.

[oceanstone]

Also the IRC/XMPP bridge has to be specifically enabled by a team admin. After this, the bridge can be disabled at any time by team admins.

https://slack.zendesk.com/hc/en-us/articles/201727913-Connec...