# 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.

- **Role:** Co-Founder & CEO at Auctor
- **Organizations:** Auctor, Meta, Y Combinator, Johns Hopkins University
- **Nationality:** American
- **Education:** Biomedical Engineering & Computer Science (did not complete - left to found Auctor), Johns Hopkins University, High school, Dublin City Schools (Dublin, Ohio)
- **Known for:** Co-founded Auctor and raised a $20M Series A led by Sequoia Capital within roughly a year of launch., Attracted backing from Microsoft's M12, HubSpot Ventures, Workday Ventures, OneStream, Tercera, Dig Ventures and Y Combinator., Assembled a founding team with backgrounds at Meta, Google, AWS, Apple, ServiceNow and NASA.

## Career timeline

- **2021** — Graduated from Dublin City Schools in Dublin, Ohio, and enrolled at Johns Hopkins University.
- **2023-2024** — Worked at Meta before leaving to pursue entrepreneurship.
- **2025** — Co-founded Auctor and went through Y Combinator's 2025 batch; dropped out of Johns Hopkins to build the company full time.
- **2026** — Led Auctor out of stealth with a $20M Series A led by Sequoia Capital (April 2026).

## Achievements

- Co-founded Auctor and raised a $20M Series A led by Sequoia Capital within roughly a year of launch.
- Attracted backing from Microsoft's M12, HubSpot Ventures, Workday Ventures, OneStream, Tercera, Dig Ventures and Y Combinator.
- Assembled a founding team with backgrounds at Meta, Google, AWS, Apple, ServiceNow and NASA.
- Signed early customers including Valiantys, Atlassian's largest solution partner.
- Delivered reported efficiency gains of up to 80% in the discovery and design phases for customers.

## Latest updates

- **2026-04** — Auctor emerged from stealth with a $20M Series A led by Sequoia Capital.

## Links

- Website: https://www.getauctor.com
- LinkedIn: https://www.linkedin.com/in/weihongsun

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Profile page: https://yespress.io/william-sun
Published by YesPress — https://yespress.io
Last updated: 2026-07-07