Pocket FM hit ~$500M ARR (2x YoY) with 250M+ listeners and 135+ min/user/day engagement. 70% revenue from US market.

Core tech: Microtransaction engine built around serialized 10-min audio stories. Think cliffhanger-driven coin unlock system for next episode access. Not passive listening—it's gamified content consumption.

New product Sherpa = AI narrative engine that ingests retention analytics to optimize episode hooks and pacing. Basically using user drop-off data to tell creators exactly where to tighten the script.

This isn't Spotify or podcasts. It's TikTok's dopamine loop applied to audio fiction with direct monetization per unlock. If audio content can replicate short-form video's retention mechanics, Pocket FM's engine might be the first real proof of concept at scale.