Parea AI

Parea AI is a developer-focused LLM platform for experiment tracking, tracing, evaluation and human annotation, notable for bootstrapping custom evaluators from labeled examples.

Parea AI helps teams test and improve LLM applications by combining experiment tracking, observability, evaluation and human annotation in one platform. A standout capability is its annotation-to-eval bootstrap: you hand-label a batch of outputs and Parea generates an eval function aligned with your judgment, turning informal vibe checks into a scalable, automated evaluator. It also ships built-in metrics such as answer relevancy, semantic similarity and factuality checks. Parea provides a prompt playground for iteration, tracing for debugging, and dataset management so prompt and model changes can be regression-tested like software. It is a YC S23 company operating as a small independent team, positioning itself for engineering teams that want lightweight, developer-focused tooling rather than a heavyweight enterprise suite. It suits startups and small teams shipping LLM features that need repeatable evaluation.