Raindrop

Raindrop is a San Francisco applied-AI company building the monitoring and observability platform for AI agents - often described as 'Sentry for AI agents.' It traces production agent runs, automatically detects silent failures like hallucinations, loops, and broken tools, and uses small custom models to surface behavioral signals such as user frustration. Founded in 2023 by Zubin Koticha, Alexis Gauba, and Ben Hylak, the company raised a $15M seed round led by Lightspeed in December 2025 and counts Replit, Speak, Clay, Framer, and AngelList among its customers.