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ReasonLens

ReasonLens

Understand, compare, and debug AI application traces

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ReasonLens is an open-source AI observability platform that helps developers understand how AI applications reach their answers. Visualize LLM traces, RAG retrieval evidence, claims, and execution paths. Compare runs, inspect evidence changes, evaluate quality gates, and detect potential regressions in latency, cost, and provenance. Built for developers building reliable AI applications, with self-hosting and team workspaces in mind.

ReasonLens makers

Here are the founders, developers, designers and product people who worked on ReasonLens