LLM Evaluation Platforms

Best LLM Evaluation Platforms (2026)

In brief

We are testing the leading LLM evaluation platforms hands-on: tracing, offline and online evals, LLM-as-judge, human review, RAG and agent metrics, CI integration, pricing and self-hosting. Results will be published here with a visible “last tested” date. No rankings are bought.

This site compares LLM evaluation platforms for engineers choosing a tool to test and monitor LLM features. Every review is based on hands-on testing, and every claim links to a source or a test.

Platforms we are testing

Braintrust, LangSmith, Langfuse, Arize Phoenix, DeepEval / Confident AI, Galileo, W&B Weave, MLflow, Patronus AI, TruLens, Promptfoo and Ragas.

The first reviews are in progress. Read the methodology to see how we test.