AI company Lassie, founded by former Robinhood and Superhuman employees Steijn Pelle and Frédéric Renken, has raised $35 million in a Series A funding round led by a16z. The round also saw participation from Night Capital, the founders of Superhuman, Plaid, and Wise, bringing Lassie's total funding to $47 million. Lassie operates in over 700 dental clinics across 49 U.S. states, saving owners more than 250,000 hours of administrative work annually. The company's AI agents automate insurance claims and payment reconciliations, eliminating the need for manual processing. Alex Rampell, a general partner at a16z, has joined Lassie's board of directors.