Sounds like an open source Branch. It has most of the same features (real-time, can have separate threads, moderation), but with participation from anyone.
The differences between a forum system designed to be implemented on someone's webpage and a big platform for "social interaction" are significant. Discourse could be used for a narrow purpose (i.e. creating a developer forum or a customer service portal), Branch can't. Just because their external appearance shows similarities doesn't mean they are the same product, or even in the same market.