Paid, an AI startup founded by Manny Medina, has closed a $21.6 million seed funding round led by Lightspeed, bringing its total funding to $33.3 million. The company, which emerged from stealth in March, offers a unique approach to billing for AI agents, termed 'results-based billing.' This model allows agent makers to charge clients based on the value their agents provide, rather than traditional per-user fees. Medina emphasizes the need for agents to demonstrate their value, as many AI projects fail to deliver tangible results. Early customers include sales automation startup Artisan and ERP vendor IFS. Lightspeed's Alexander Schmitt notes that Paid's approach is unique in the market, addressing a critical issue in AI deployment.