Thai Duong
About Thai Duong
Thai Duong is the founder of Calif. <cite index="3-1">Crunchbase lists him as Chief and Founder at Calif since April 2023, based in Mountain View, California.</cite> His LinkedIn headline says he was born in Saigon and grew up on the Internet.
This page does not cover his earlier career. We did not find a source we could confirm for it, so we left it out.
<cite index="3-1">Crunchbase shows one portfolio company for Thai Duong, the Zalos seed round, and lists him as an individual investor.</cite> We found no public record of other angel investments, an investment count, or fund or syndicate activity. He is not known to run a fund.
<cite index="2-1">In March 2026, Zalos announced a $3.6 million seed round led by 14 Peaks Capital, with participation from Cohen Circle, 20VC and a group of angel investors.</cite> <cite index="7-1">The company's press materials name Thai Duong (Founder, Calif) among the angels in the round.</cite>
<cite index="2-1">Zalos is based in London and San Francisco. It builds autonomous AI agents, which it calls "Computer Agents", that automate repetitive finance workflows inside a company's existing systems.</cite> <cite index="2-1">It was founded in 2025 by CEO William Fairbairn and CTO Hung Hoang, and came out of Y Combinator's F25 batch.</cite>
Thai Duong has not publicly stated his preferred stage, sectors, geographies or check size. The only public data point is an early-stage investment in an AI agents company for enterprise finance teams. We have not found his check size in this round or any statement about what he looks for in a pitch.
- Zalos: AI Computer Agents that automate finance workflows for CFOs and finance teams. He took part in its $3.6M seed round, announced March 2026.
Investing activity
Thai Duong appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $4M. The most recent is Zalos (Seed, $3.6M, Mar 2026).
Thai Duong most often invests alongside 14Peaks Capital, Edward Woodford, Harry Stebbings and Minh Pham, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Thai Duong
Who is Thai Duong, the angel investor?
Thai Duong is the founder of Calif and is based in Mountain View, California. He is listed as an angel in Zalos's 2026 seed round.
What AI startups has Thai Duong invested in?
The public record shows Zalos, an AI agents company for finance workflows. He joined its $3.6M seed round, announced in March 2026.
What is Thai Duong's check size?
His check size is not public. Press coverage of the Zalos round does not break out individual angel amounts.
What stage does Thai Duong invest in?
He has not stated a stage focus. His one known AI investment is a seed round.
How can founders contact Thai Duong?
He has a public LinkedIn profile. We did not find a personal website or a confirmed X account for him.
Is Thai Duong an angel investor?
Yes. Thai Duong invests personally as an angel.
What AI companies has Thai Duong invested in?
Thai Duong's AI investments include Zalos. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Thai Duong invest at?
In the rounds tracked on Lounge, Thai Duong has invested at Seed, with a median round of $4M.
Who does Thai Duong co-invest with?
Thai Duong's most frequent co-investors on Lounge are 14Peaks Capital (1 deal), Edward Woodford (1 deal), Harry Stebbings (1 deal), Minh Pham (1 deal) and Jon Langbert (1 deal).
How can founders reach Thai Duong?
Founders on Lounge can see Thai Duong's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Thai Duong to their Investor Pipeline to track the conversation.