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Most agents pass their evals and fail in production. Prefactor is the evaluation layer that closes the gap. We score every agent run in real time, surface quality regressions and drift as they happen, and show engineering teams exactly how their agents are performing at scale. Built for the teams shipping agents to customers.

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Simon Russell is the Co-founder and CTO of Prefactor.

6 people are employed at Prefactor.

Prefactor is based in San Francisco, California.

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