NOSO Labs is a Y Combinator S25 startup that builds AI agents for field technicians in the home-services industry, helping them diagnose problems and capture sales 10x better. The agents improve diagnostic accuracy and help technicians identify and close sales opportunities while reducing paperwork burden. The company raised a $500K pre-seed round in 2025 with backing from Y Combinator and Rebel Fund. NOSO Labs is based in San Francisco.