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Startups & Venture·September 19, 2026·1 min read

Raindrop, which develops tech for monitoring AI agents to catch failures such as hallucinations and tool misuse, raised a $35M Series A led by CRV

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A $35M Series A for Raindrop is a bet that agent monitoring — hallucinations, tool misuse, runaway workflows — becomes its own layer in the stack, not a feature bolted onto core platforms. If you’re piloting agents, you now need a vendor story not just for orchestration, but for observability and control.