Steijn Pelle

Steijn Pelle is the co-founder and CEO of Lassie, a San Francisco AI company building an autonomous back-office worker that runs the financial admin of independent businesses, starting with dental and medical practices. A Dutch transplant to Silicon Valley with roughly 15 years in startups, he cut his teeth on consumer growth at HealthTap, Coinbase and Robinhood before founding Lassie in 2021. In June 2026 the company raised a $35M Series A led by Andreessen Horowitz, bringing total funding to $47M, while operating in more than 700 practices across 49 states.