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Promptfoo vs Ragas

Agent-native side-by-side. Scores are curated estimates on a 0–10 scale. Lock-in: higher = worse. Prefer JTBD picks via /api/decide when choosing for a job.

Promptfoo profileRagas profileOpen interactive compare
DimensionPromptfooRagas
Overall8.48.3
Capability fit8.28.0
Price / performance9.29.5
Latency / reliability7.87.5
Developer & agent DX8.88.2
Privacy / data retention9.09.2
Lock-in risk (higher = worse)2.52.0
Maturity / track record8.07.8
PricingAs of 2026-10-24 (promptfoo.dev/pricing, fetched 2026-10-24): Community 'Free Forever' ('Our open-source tool, perfect for individual developers and small teams.') with 'Red teaming (10k probes/month)' and 'Run locally o…As of 2026-09-14: Free open-source RAG evaluation library; cost is judge-LLM tokens only (~$0.50–$2 per 100 queries with cheap judges). No hosted SaaS required. Deep LangChain/LlamaIndex integration.
TaglineDefault OSS eval harness. Braintrust when you want hosted collaboration; Promptfoo when you want local/CI…Default RAG metric library. Pair with Promptfoo/Braintrust for broader agent evals.

Promptfoo

Default OSS eval harness. Braintrust when you want hosted collaboration; Promptfoo when you want local/CI control. Strengths: OSS + CI-native; Red teaming built-in; Multi-provider comparisons.

Strengths

  • OSS + CI-native
  • Red teaming built-in
  • Multi-provider comparisons

Weaknesses

  • Less polished product UI than Braintrust
  • Enterprise features gated
  • You bring judge costs
GET /api/providers/promptfoo

Ragas

Default RAG metric library. Pair with Promptfoo/Braintrust for broader agent evals. Strengths: RAG-specific metrics; Free/OSS; Python-native.

Strengths

  • RAG-specific metrics
  • Free/OSS
  • Python-native

Weaknesses

  • Not a full agent-trace platform
  • You operate harness
  • Less red-team than Promptfoo
GET /api/providers/ragas

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