czech-republic
(3)
Andrew Antos
Andrew Antos is the Czech-born Founder and CEO of Klarity, a San Francisco-based AI platform that automates document-intensive workflows for enterprise finance and accounting teams. Born in Brno one year before communism fell, he grew up in a family of scientists, studied law in Europe, then pivoted to entrepreneurship after Harvard Law School and an MIT startup course. He co-founded Klarity in 2017 with Nischal Nadhamuni, raised $90M+ from Y Combinator, Scale Venture Partners, Nat Friedman, and Daniel Gross, and counts DoorDash, Zoom, Cloudflare, and OpenAI among his customers. Klarity's AI platform achieves 82%+ pass-through rates on contract and invoice processing, reduces month-end close by 2-3 days, and automates up to 87% of manual finance work.
Stan Richter
Stan Richter is co-founder and CEO of signageOS, the company that built a unification layer between digital signage hardware and the CMS platforms that run on top of it. Founded in Prague in 2016, signageOS solves the fragmentation problem that has plagued digital signage for decades - dozens of SoC operating systems, dozens of manufacturers, no common API. Richter turned that chaos into a business, bootstrapped growth to global scale, raised $4.2M from Reflex Capital, relocated to San Francisco, won the 2025 Outstanding Individual award at the Global Digital Signage Awards, and in January 2026 unveiled Supra - an encrypted edge-streaming platform that extends the usable life of existing hardware by two to five years.
Bijan Sabet
Bijan Sabet is a first-generation American venture capitalist, co-founder of Spark Capital, and former U.S. Ambassador to the Czech Republic. The son of Iranian and Korean immigrants who met in a New York medical school, he drove from Boston to Silicon Valley after a 1991 Macworld, built foundational consumer internet companies, then returned east to co-found Spark Capital in 2005 - backing Twitter when it had 11 employees, Tumblr before it sold to Yahoo for $1.1 billion, and Discord before it became the home for every online community. After stepping back from Spark in 2021, President Biden appointed him Ambassador to Prague, where he served until January 2025. He is also a film photographer, board member of Human Rights Watch, and trustee at Boston College.