VCs Bet on 'AdSense for AI' with $20.5M Koah Investment
What happened
Theory Ventures led a $20.5 million Series A for Koah, a startup described as an "AdSense for AI." The investment thesis is that major interface shifts, like the move to AI, create new $100 billion-plus advertising markets, and that AI-native marketing platforms will capture this value.
Why it matters
- This Series A funding brings Koah's total capital raised to over $26 million, following a $5 million seed round in September 2025. - As part of the investment, Tomasz Tunguz, a founder and General Partner at Theory Ventures and a former member of the Google AdSense team, will join Koah's board of directors. - Koah's platform allows developers of AI applications to embed native, contextual advertisements directly into conversational AI experiences using a lightweight SDK. - The company aims to solve the monetization challenge for AI applications, where high inference costs can make subscription-only models difficult to scale. - In the past year, Koah's ecosystem has grown to over 2 million monthly active users, and it has delivered more than 35 million native ad impressions across 175 million queries. - Other investors in the Series A round included Forerunner, South Park Commons, and AppLovin co-founder Andrew Karam. - Koah is already working with AI applications such as Liner, Viro, and Sup AI to help them monetize their user interactions. - The company was founded by Nic Baird, Mike Choi, and Herrick Fang, who previously worked together at Affirm, Supermove, and Qualified.
Key numbers
- - This Series A funding brings Koah's total capital raised to over $26 million, following a $5 million seed round in September 2025.
- In the past year, Koah's ecosystem has grown to over 2 million monthly active users, and it has delivered more than 35 million native ad impressions across 175 million queries.
What happens next
- As part of the investment, Tomasz Tunguz, a founder and General Partner at Theory Ventures and a former member of the Google AdSense team, will join Koah's board of directors.
- The company aims to solve the monetization challenge for AI applications, where high inference costs can make subscription-only models difficult to scale.
Quick answers
What happened in VCs Bet on 'AdSense for AI' with $20.5M Koah Investment?
Theory Ventures led a $20.5 million Series A for Koah, a startup described as an "AdSense for AI." The investment thesis is that major interface shifts, like the move to AI, create new $100 billion-plus advertising markets, and that AI-native marketing platforms will capture this value.
Why does VCs Bet on 'AdSense for AI' with $20.5M Koah Investment matter?
This Series A funding brings Koah's total capital raised to over $26 million, following a $5 million seed round in September 2025. As part of the investment, Tomasz Tunguz, a founder and General Partner at Theory Ventures and a former member of the Google AdSense team, will join Koah's board of directors. Koah's platform allows developers of AI applications to embed native, contextual advertisements directly into conversational AI experiences using a lightweight SDK. The company aims to solve the monetization challenge for AI applications, where high inference costs can make subscription-only models difficult to scale. In the past year, Koah's ecosystem has grown to over 2 million monthly active users, and it has delivered more than 35 million native ad impressions across 175 million queries. Other investors in the Series A round included Forerunner, South Park Commons, and AppLovin co-founder Andrew Karam. Koah is already working with AI applications such as Liner, Viro, and Sup AI to help them monetize their user interactions. The company was founded by Nic Baird, Mike Choi, and Herrick Fang, who previously worked together at Affirm, Supermove, and Qualified.
