Simple AI

Simple AI is a San Francisco startup building enterprise-ready voice AI agents that handle inbound and outbound B2C phone calls. Its agents answer questions, personalize offers, qualify leads, and close and upsell transactions over the phone - the company says they convert and upsell up to 30% more than trained human reps. Founded in 2024 by former Y Combinator software leads Catheryn Li and Zach Kamran, Simple AI runs on a proprietary voice stack with sub-850ms end-to-end latency and raised $14M in seed funding in February 2026.