This looks like an interesting idea to talk about a given topic or allowing others to engage and create a community. So far it seems to be a little light on functionality, but everything that exists is super intuitive and quite beautiful. They may have something here.
Hall.com: “Our Story
Frustrated by communication tools that were siloed and did not solve real problems. The team quit corporate america to solve the problem.
The company is headquartered in Mountain View, CA.”