Most companies lack the expertise and resources. Kapa means they get a docs bot while maintaining focus on what they do best.
Kapa must be doing something right since they seem to be growing. Having used it in a few discords, it's what I'd expect for quality for a saas product built on current ai capabilities.
It's marketing. The person you responded to said they're all marketing. Saying they "must be doing something right" because other people are also falling for it is how you get scammed.
Even OpenAI, GP's alternative, is listed as using Kapa... and no public sign ups available yet either
I saw a glimpse of the internal dashboard companies get. It's much more than just question answering. Another big piece is the feedback, seeing user interaction, and being able to improve things over time
The best at least for now is to just use OpenAI’s custom gpt and with some clever (but not hard) it’s quite good.