Free Promptfoo Alternatives in 2026

Looking for free alternatives to Promptfoo? We've gathered 8 similar AI tools, including 1 with free or freemium plans, so you can compare no-cost options and find the right fit. Top free picks include Opik.

Best Free Promptfoo Alternatives

  1. Opik (Freemium) (Free option) — Open-source LLM evaluation and observability platform by Comet. More Promptfoo alternatives
  2. Agent QA (Pricing varies) — Write web and mobile tests in natural language. More Promptfoo alternatives
  3. Ragas (Pricing varies) — Evaluate AI application behavior with a testing framework. More Promptfoo alternatives
  4. Testim (Pricing varies) — Create and maintain automated UI tests with AI assistance. More Promptfoo alternatives
  5. Evidently AI (Pricing varies) — Evaluate and monitor language models and predictive AI systems. More Promptfoo alternatives
  6. Keploy (Pricing varies) — Test code changes against captured API behavior and dependencies. More Promptfoo alternatives
  7. LLM Comparator (Pricing varies) — Compare model responses with an interactive evaluation interface. More Promptfoo alternatives
  8. TruLens (Pricing varies) — Trace AI applications and score their behavior with evaluation tools. More Promptfoo alternatives

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