
He cold-emailed his way into Yelp, learned from a failed YC startup, and found his next company hiding in Datadog customer calls. Now the Superblocks CEO is trying to make AI-built software move fast without leaving IT to clean up the confetti.

After two exits, one shutdown and years spent watching teams rebuild the same back-office software, Abhishek Nayak found his durable idea in the work nobody puts on a billboard.
David Hsu is the founder and CEO of Retool, a San Francisco-based developer tools company that lets engineers build internal software through a drag-and-drop interface. He founded Retool in 2017 at age 25 after pivoting from a failed fintech startup (Cashew/Oatpay) where he kept having to build internal tools from scratch. A Computer Science and Philosophy graduate from Oxford, Hsu grew Retool to $2M ARR before public launch, achieved a $3.2B valuation by 2022 with $140M in total funding from Sequoia Capital and notable angels including the Stripe founders, and now serves over 10,000 companies including Amazon, Netflix, OpenAI, and the US Army.