Raindrop raised $35.0M in Series A funding to help AI engineers catch the silent failures that don't throw errors but still break things. The round was backed by CRV, Lightspeed Venture Partners, and Y Combinator.
The company's tool alerts engineers when their AI agents misbehave, linking directly to the events so they can dig into conversations or traces, find the root cause, and fix it fast. It's a narrow but increasingly urgent problem: as more companies ship AI agents into production, the failures that matter most are often the ones that never trigger a stack trace.
