TruLens

trulens.org · LLM Evals

Open source

#10 in LLM Evals

Instrumentation and feedback functions for evaluating and tracking LLM apps, known for the RAG triad metrics.

#feedback-functions#rag-triad#tracing#snowflake

TruLens is one of 20 LLM eval tools on TrueIQ. See all LLM eval tools or how we check facts.

// guides

Guides that cover TruLens

What Is Answer Completeness in RAG Evaluation?
What is answer completeness in RAG evaluation? The share of key facts from a reference answer that a response covers, and how Azure, Bedrock and Ragas score it.
What Is Faithfulness in RAG Evaluation?
What is faithfulness in RAG evaluation? The share of an answer's claims backed by the retrieved context, and how Ragas, DeepEval, TruLens and HHEM score it.
RAG Evaluation Metrics: Ragas vs DeepEval vs TruLens
RAG evaluation metrics explained: faithfulness, relevancy, context precision and recall, which need a reference, and how Ragas, DeepEval and TruLens differ.
LLM Hallucination Detection: Methods and Tools
How LLM hallucination detection works in 2026: faithfulness checks, detector models like HHEM, self consistency and semantic entropy, and the tools to use.
Best LLM Evaluation Frameworks in 2026, Compared
The best LLM evaluation frameworks in 2026: Promptfoo, DeepEval, Ragas, Inspect and TruLens for apps, plus lm-evaluation-harness and HELM for model benchmarks.

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