Gravity Raises $30.5M for AI Chatbot Ads. It Targets Agent-to-Agent Placements. Of Course It Does.
Gravity, founded by Leo Martinez and Zach Oldham, operates a full-stack ad platform with three components: a demand-side platform for advertisers, a supply-side platform for AI developers to monetize, and an exchange connecting the two. The company places ads in AI platforms including ChatGPT, Codebuff, Magneta, and Runnable. It has raised $30.5 million and is now exploring agent-to-agent advertising. Oldham believes AI ads will become the world's largest advertising channel.
This demonstrates adtech intermediation theory. The mechanism is platform capture: whoever controls the ad layer between AI applications and advertisers controls the economics. The agent-to-agent exploration is the telling detail. When AI agents negotiate with other AI agents, advertising becomes a protocol, not a medium. The implication is that advertising is being restructured as machine-to-machine communication, and the intermediary who builds that infrastructure first wins.
Gravity, cofounded by Leo Martinez and Zach Oldham, has raised $30.5 million for its AI advertising platform. Clients include Best Buy and Target.
- Open ChatGPT or any free AI chatbot and ask it to recommend a product in a category you care about. Observe whether any brand names appear prominently or repeatedly in the response.
- Search the same product category on Google and compare which brands appear in traditional ads versus what the AI recommends. Note the gap between paid placement and organic AI suggestion.
- Visit a free AI application like a coding assistant and observe whether any sponsored content or brand mentions appear during your session. This is the inventory Gravity is selling.