William Sun

William Sun is the co-founder and CEO of Auctor, a New York AI company building the 'system of action' for enterprise software implementation. He dropped out of Johns Hopkins - where he studied biomedical engineering and computer science - and left a job at Meta to start the company, which he built with three co-founders drawn from Google, AWS, Apple, ServiceNow and NASA. In April 2026 Auctor emerged from stealth with a $20M Series A led by Sequoia Capital, with backers including Microsoft's M12, HubSpot Ventures, Workday Ventures, OneStream, Tercera and Y Combinator. Auctor's AI agents capture discovery calls and workshops, turn them into structured requirements, and generate the artifacts - SOWs, proposals, architecture docs, user stories - that consultants used to hand-build over weeks.