AIRaindrop announces Series A and early access to Simulations for AI-agent testing
Raindrop says it has now raised $50 million from CRV and Lightspeed. The company pitches Simulations as a way to catch agent failures before deployment, alongside its existing work detecting problems in production.
TLDR
Raindrop announced its Series A and early access to Simulations on September 17, 2026. The company says CRV led the round, with participation from researchers and leaders at Anthropic, Thinking Machines and OpenAI. Investor Lightspeed says the round brings Raindrop’s total funding to $50 million. Raindrop says Simulations automatically creates test environments with simulated services and databases for every pull request—a proposed code change. Lightspeed describes the product as a research preview that replays real production traffic and existing test cases against proposed agent changes, looking for unexpected behavior before deployment.
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Raindrop announces Series A and early access to Simulations for AI-agent testing
Raindrop says it has now raised $50 million from CRV and Lightspeed. The company pitches Simulations as a way to catch agent failures before deployment, alongside its existing work detecting problems in production.