Free ai engineering · evals in the Top 11

8 providers in the Top 11 Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026 offer a free tier; the most credible is Galileo.

Why this answer

Filtered to entries with a published free tier (not just a free trial). When the pricing page is ambiguous we err conservative — paid-only by default.

Showing all 8 matches. Top 11 publishes whatever the data supports — we don’t pad lists. See the full ranked Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026.

  1. #1Galileo(rank #1 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    The best platform for production RAG, offering powerful, real-time hallucination detection and deep system insights.

    Full Galileo review · Compare: Galileo vs LangSmith · Alternatives

  2. #2LangSmith(rank #2 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    The essential debugging and evaluation tool for anyone building with the LangChain framework.

    Full LangSmith review · Alternatives

  3. #3Arize AI(rank #3 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    An enterprise-grade, unified platform for monitoring both traditional ML and LLM applications at scale.

    Full Arize AI review · Alternatives

  4. #4Weights & Biases(rank #4 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    Extends best-in-class experiment tracking to LLM evaluation, perfect for systematic prompt engineering and development.

    Full Weights & Biases review · Alternatives

  5. #5UpTrain(rank #6 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    Offers a flexible path from a powerful open-source library to a managed cloud platform.

    Full UpTrain review · Alternatives

  6. #6RagaAI(rank #9 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    A comprehensive AI testing platform with 300+ automated tests to diagnose issues across the entire lifecycle.

    Full RagaAI review · Alternatives

  7. #7Humanloop(rank #10 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    An integrated platform for building, evaluating, and fine-tuning LLMs with a tight human feedback loop.

    Full Humanloop review · Alternatives

  8. #8Ragas(rank #11 in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026)

    Free tier

    The leading open-source framework for RAG evaluation, offering powerful metrics for teams building their own infrastructure.

    Full Ragas review · Alternatives

Methodology: /methodology · No paid placement ever · Verified .