A startup that places ads for brands like Best Buy and Target in AI platforms raised $30.5 million

Gravity cofounders Leo Martinez and Zach Oldham. Courtesy of Gravity The startup Gravity thinks AI ads will become the world's biggest ad channel. It offers tools for buying ads on AI platforms and helps AI developers monetize through ads. Gravity just raised a Series A funding round as it begins exploring "agent-to-agent" ads. Zach Oldham, cofounder of the adtech startup Gravity, thinks AI ads will eventually become the world's largest advertising channel. His company just secured fresh…