https://meet.jit.si has a similar drop in like experience, where no accounts are required, which I believe is in part the reason Zoom was popular in the beginning.
I was curious, so looked at their paid offering[0]. I couldn't find their prices without making an account. Bad sign imo, but the free offering seems sufficient.
I think what you're looking looking for is here https://jaas.8x8.vc, which states their pricing for the enterprise offering of Jitsi Meet.
Thanks. I have used this before for a 1-1 and it was decent. Not sure how it scales when there are 20 participants; something Zoom was good with. Any experience?