Hey Everyone!! My name is Dave and I work on the Service Hub product team -- we are about to release (into Beta) Restricted Article Access for the Knowledge Base. This feature will allow you to password protect your KB (by article) and the segmentation of who can view this articles will be ‘list based’ -- ex. I have Silver, Gold, Platinum customers - as long as these folks are accurately tagged in a list, they will only be able to view those articles that list has been provisioned to see).
If you are interested in the beta, feel free to ping me directly: dbarron@hubspot.com -- I’d expect a beta release in the next few weeks 