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Ragas vs Promptfoo
Quick verdict
Ragas and Promptfoo are closely matched on licensing, self-hosting and OpenTelemetry support — the decision comes down to pricing and framework integrations below.
Side-by-side comparison from the Agent Observability Index: licensing, self-hosting, pricing model and integrations — no vendor copy, primary sources linked.
| Ragas | Promptfoo | |
|---|---|---|
| One-liner | The de-facto open-source metric library for RAG evaluation (faithfulness, context precision/recall), used standalone or inside other platforms. | Config-file-driven open-source CLI for prompt evals, regression testing and LLM red-teaming that runs in CI. |
| Category | Evals & Testing | Evals & Testing |
| OpenTelemetry-native | — | — |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Pricing model | free | freemium |
| Pricing notes | Apache-2.0 OSS; hosted app in development by Exploding Gradients | CLI/library free (MIT); paid enterprise for red-teaming at scale |
| Frameworks | langchain, llamaindex, openai-sdk, haystack | openai-sdk, anthropic, langchain, ollama, vercel-ai |
| GitHub stars | 14.4k | 22.2k |
| Maturity (GitHub signal) | 79/100 (Established) | 100/100 (Mature) |
| Funding / ownership | Y Combinator alum (Exploding Gradients) | $5M seed (a16z, 2024) |
How to choose
- Both link to primary pricing sources below — verify current tiers before committing; this market shifts monthly.
Frequently asked questions
Is Ragas or Promptfoo open source?
Ragas: Yes. Promptfoo: Yes.
Can Ragas and Promptfoo be self-hosted?
Ragas: Yes. Promptfoo: Yes.
Ragas vs Promptfoo: which should I choose?
Ragas and Promptfoo are closely matched on licensing, self-hosting and OpenTelemetry support — the decision comes down to pricing and framework integrations below.