Hi @max6387, sorry for missing this thread, and thanks to @atig for the bump,
If you’re looking for an alternative to IRC, Mattermost could be a strong choice. Using Matterircd your existing IRC users could continue using their IRC clients and connect with Mattermost, while community members who want convenience features like support for mobile devices, searching through history, sharing files, setting up integrations, etc.
I think I might have heard about channel-specific moderator permissions casually, but can’t find a post for it in the feature idea forum. Please feel free to add one so it can be discussed and upvoted by the community?
Regarding scale, even though Mattermost is explicitly built for “teams”, the Mattermost platform should be able to support tens of thousands of users on a single server with appropriate hardware.
My assumption is this would satisfy 90%+ of large IRC communities.
Please see FAQ for our current views on SaaS.