I'm trying to find the feature set compared to slack (since they are trying to put it against it) but can't seem to find it on their site or anywhere ... ? I c

I'm trying to find the feature set compared to slack (since they are trying to put it against it) but can't seem to find it on their site or anywhere ... ? I can see that this is newer so it's probably not feature complete. Do they have webhooks? Calls? Screen sharing?