Mike Choi is Co-Founder at Koah, a native advertising platform that embeds contextual ads directly into generative AI applications. Koah has raised over $26M in funding and serves over 2 million monthly active users across AI apps like Liner, Luzia, and DeepAI.

Mike graduated from Texas A&M University and worked at Apple, Twitter/X, and was a Founder Fellow at South Park Commons. He co-founded Koah in 2024 with Nic Baird and Herrick Fang after leaving X.

Mike champions transparency in AI advertising, pioneering innovative ad formats like suffix ads that achieve 6% CTR on mobile. He focuses on rapid experimentation, optimizing for the number of tests run at any given time.

Koah raised a $20.5M Series A led by Theory Ventures in February 2026, bringing total funding to over $26M. The platform has served over 35 million ad impressions across 175 million queries.

Koah's ecosystem reaches over 2 million monthly active users engaging with AI 3x per day. Early partners averaged $10,000 in their first 30 days, with ad formats achieving click-through rates up to 6%.