Stella

Stella is a Y Combinator-backed AI assistant that turns any website into a 24/7 customer expert. Installed with a single line of code, it learns from a site's own content to answer visitor questions, qualify leads, and route complex cases to humans. Founded by Ryan Endacott (YC S22), Stella serves small businesses, SaaS companies, and local governments - including the Town of Carmel, NY, where it answered more than 2,400 resident questions and saved staff over 200 hours.