Chose Stonly
Intercom and Gist are more focused on Live chat, but the knowledge base is part of their offerings. I love that Stonly is really fleshed out and offers deep features built around the customer education experience.
Independently Invited by TrustRadius
A de minimis incentive was given to thank the reviewer for their time. The incentive was not used to bias or drive a particular response, nor was the incentive contingent on a positive endorsement. More Info