# Keith Peiris

> Keith Peiris is the San Francisco-based co-founder and CEO of Lightfield, an AI-native CRM, and previously co-founded Tome. His career includes product leadership at Facebook and Instagram, a nanotechnology engineering degree from Waterloo, and early web-design entrepreneurship. His recent work centers on turning customer conversations into context for software and AI agents.

- **Role:** Co-founder and CEO at Lightfield
- **Organizations:** Lightfield, Tome, Greylock, Citizen, Glossier, Instagram, Facebook, University of Waterloo Nanorobotics Group
- **Education:** Bachelor of Applied Science in Nanotechnology Engineering, University of Waterloo
- **Known for:** Co-founded Tome, which reached approximately 25 million users according to later founder interviews and company biographies., Led Instagram Direct product work during growth to 500 million monthly active users, as described in his professional biography., Was a core member of Waterloo’s student nanorobotics team, which placed third at the 2010 NIST challenge.

## Career timeline

- **Childhood** — Built websites and developed a web-design business with his father in Ontario.
- **2006-2011** — Studied nanotechnology engineering at the University of Waterloo.
- **2007** — Won the Sandford Fleming Foundation debate final with Uzair Chutani; the contemporary newspaper prints his surname as Cutani.
- **2010** — Wrote about the Waterloo nanorobotics group’s third-place NIST Mobile Microrobotics Challenge finish; he was a core team member.
- **2011-2016** — Worked in product management at Facebook.
- **2016-2018** — Led messaging and camera AR product work at Instagram.
- **2018** — Served as head of product at Glossier.
- **2019** — Served as head of product at Citizen.
- **2020** — Became an entrepreneur in residence at Greylock and co-founded Tome with Henri Liriani.
- **2022** — Tome publicly introduced its storytelling platform.
- **2023** — Tome announced a $43 million Series B led by Lightspeed and reported reaching one million users.
- **2024** — Publicly described Tome’s transition from consumer presentations toward sales tools.
- **2025** — Shifted from Tome to Lightfield; Lightfield launched publicly in November.
- **2026** — Lightfield announced a $47 million Series A led by a16z on September 9.

## Achievements

- Co-founded Tome, which reached approximately 25 million users according to later founder interviews and company biographies.
- Led Instagram Direct product work during growth to 500 million monthly active users, as described in his professional biography.
- Was a core member of Waterloo’s student nanorobotics team, which placed third at the 2010 NIST challenge.
- Co-founded Lightfield, which announced a $47 million Series A in September 2026.

## Latest updates

- **2026-10** — Co-authored an October 23 product update covering Jev-based mail and meeting classification, LinkedIn conversation syncing, and meeting recorder improvements.
- **2026-10** — Co-authored an October 16 release covering sequence templates, collaborative editing, and related-object creation from picklists.
- **2026-09** — Announced Lightfield’s $47 million Series A led by Andreessen Horowitz and reported more than 5,000 company signups since November 2025.
- **2026-09** — Discussed the Tome pivot and Lightfield’s business-world-model approach on the a16z podcast.

## Links

- Website: https://lightfield.com
- LinkedIn: https://www.linkedin.com/in/keithpeiris
- Twitter/X: https://x.com/keithpeiris

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Profile page: https://yespress.io/keith-peiris
Published by YesPress — https://yespress.io
Last updated: 2026-10-25