Powerful
AI Evaluation
The best way to ship top-tier AI products. Based on industry-leading AI research and tools


Explore the Patronus Product

Our Core Eval Platform
Evaluators, Experiments, Logs Comparisons, Datasets, Traces

Percival
An Eval Copilot for Agentic Systems. Percival helps you analyze complex traces and identify 20+ agentic failure modes

RL Environments
Dynamic, feedback-driven environments for domain-specific agent training and evaluation
Discover our Areas of Experience
We have experience evaluating support responses to prevent hallucinations, maintain tone, develop guardrails, and understand assumptions


“Automated prompt fixes are awesome — it plugs straight into our revision cycle. Eventually, I’ll probably just feed the suggested prompt edits into a ‘revise my prompt’ prompt. It’s like infinite prompt recursion, and I kind of love it”
— Paul Modderman, Founding Engineer
Enhance and Govern Self-Generating Agents at Scale
Case Study

“Emergence’s recent breakthrough—agents creating agents—marks a pivotal moment not only in the evolution of adaptive, self-generating systems (...) which is precisely why we are collaborating with Patronus AI.”
— Satya Nitta, Co-founder and CEO


"It is an extremely helpful and interesting tool for building Agent systems. I think the best compliment that I can give as a developer is that this really made me feel empowered to test out a new idea."
— Developer at Weaviate


One key use case the Etsy AI team is leveraging generative AI for is autogenerating captions on product images to speed up listing. However, they kept running into quality issues — the captions often contained errors and unexpected outputs.


"Patronus helped us uncover error patterns and optimize AI outputs (...)
It became an invaluable part of our evaluation workflow."
— Jon Noronha, Co-Founder
How Patronus Works
A unified workflow to evaluate, debug, and improve AI agents
Research-first benefits
Lynx
FinanceBench
BLUR
GLIDER
Our latest update

Percival Chat: An Eval Copilot for Agentic Systems
Chat, your eval co-pilot, aims to simplify the agent evaluation process even more by providing you with in-context guidance on tracing, integrations, evaluation criteria, and prompting.
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