If you want to allocate resources to building out the AI, connecting and ingesting sources, setting up rag, fine tuning and hyper param optimization...
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.