Allan Guo

Allan Guo is the co-founder and CEO of Willow, a San Francisco AI voice-dictation app that lets you write anywhere on your computer by talking. A Stanford CS student who dropped out as a freshman to build a healthcare startup, he pivoted more than ten times before landing on voice as the interface. Willow, part of Y Combinator's Spring 2025 batch, raised $4.2 million led by BoxGroup with backing from founders at Instacart, Shopify, HubSpot and Gusto. Guo's pitch is blunt: the keyboard is the last slow thing on a fast computer, and he intends to kill it.