Radar makes podcasts searchable, and usable by AI agents

Radar is a podcast search engine that transcribes audio from over 130,000 podcasts and makes the content searchable and understandable to AI agents. The service extracts key quotes, tracks mentions of people and companies, and sends customizable alerts when specified topics or guests are discussed. This matters because most AI agents can only search text on the web and cannot access audio content, so Radar fills that gap by providing an API that allows hedge funds, researchers, and AI search platforms to access podcast intelligence programmatically. The product emerged from a feature in Particle's news reader app that had shown the value of indexing podcast clips, and the company decided to pivot toward building an API as interest in AI agents grew.