Top 11AI made for AI

Free ai tooling · prompt ops in the Top 11

11 providers in the Top 11 The 11 Best Prompt Engineering & Prompt Management Tools (2026) offer a free tier; the most credible is Vellum.

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 the top 11 of 11+ screened. Methodology at /methodology.

  1. #1Vellum(rank #1 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    The most complete and production-ready platform for the entire prompt lifecycle.

    Full Vellum review · Compare: Vellum vs Humanloop · Alternatives

  2. #2Humanloop(rank #2 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    Unmatched for model evaluation and integrating human feedback loops.

    Full Humanloop review · Alternatives

  3. #3PromptLayer(rank #3 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    The definitive tool for logging and versioning every prompt request.

    Full PromptLayer review · Alternatives

  4. #4Langfuse(rank #4 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    Best for open-source tracing and observability of complex LLM chains.

    Full Langfuse review · Alternatives

  5. #5Baserun(rank #5 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    The best platform for integrating prompt testing into your CI/CD pipeline.

    Full Baserun review · Alternatives

  6. #6Portkey(rank #6 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    Combines a robust AI gateway with solid prompt management tools.

    Full Portkey review · Alternatives

  7. #7LangSmith(rank #7 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    Essential debugging and observability tool for the LangChain ecosystem.

    Full LangSmith review · Alternatives

  8. #8PromptPerfect(rank #8 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    A unique and effective tool for automatically optimizing prompt quality.

    Full PromptPerfect review · Alternatives

  9. #9Weights & Biases Prompts(rank #9 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    Integrates prompt management directly into the core W&B MLOps workflow.

    Full Weights & Biases Prompts review · Alternatives

  10. #10Arize AI(rank #10 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    A powerful observability platform for monitoring prompts in production.

    Full Arize AI review · Alternatives

  11. #11Microsoft Prompt flow(rank #11 in The 11 Best Prompt Engineering & Prompt Management Tools (2026))

    Free tier

    An open-source, code-centric framework for building and evaluating LLM flows.

    Full Microsoft Prompt flow review · Alternatives

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