Fish Audio Raises $50M Seed for AI Voice Models, Backed by $21M ARR

Fish Audio, a Palo Alto AI voice startup founded by former NVIDIA researcher Shijia Liao, raised $50 million in seed funding on July 28, 2026. Coreline Ventures and Capital Today led the round. The company reports over 8 million users and $21 million in ARR, with enterprise customers including HeyGen, Sanas, and Plaud. Fish Audio has open-sourced three speech generation models while gating its latest S2.1 Pro behind a paid API.