It's two different companies, which I guess was part of the motivation for clubhouse.io to change name to shortcut, since clubhouse.com became massively popular in a very short time
Heh yeah apparently there's more than one Clubhouse. I've never heard of any other besides the Jira competitor, and the OP just said "Clubhouse," not "Clubhouse social media" or anything like that. But I've been downvoted into oblivion, so I guess people think I'm trolling or something