Atla

Knowing whether your generative AI application is actually performing well — at scale, across edge cases, and over time — is one of the hardest problems in AI development. Atla provides frontier AI evaluation models built specifically to solve it. It offers an LLM-as-a-Judge framework to test and evaluate prompts and model versions, with Selene models that deliver precise, actionable judgments on AI app performance. Atla's evals run with industry-leading accuracy, are optimized for speed, and are fully customizable to your specific use case — giving you accurate scores and actionable critiques so you can find and fix AI mistakes before they reach your users.