Hadn't really considered something like a forum TBH. We just want a place where people can come and give us feedback on our product, potentially in private so other teams can't see what they're saying. People often expose things they're working on or at the very least their way of working to us and that's not something they necessarily want open to the public.

Slack is free which is really appealing. But it is a barrier for some people because they don't want to open another slack workspace (slack fatigue).

We also integrate to Discord and like that a lot so that's one option for us for sure.

If you used something like topicbox, you might be able to get a workflow of "email feedback to private generated on demand email, have a private link to a no-login-for-customers web interface to follow that convo"?