Promptfoo vs Ragas: Which is Better in 2026?
Choosing between Promptfoo and Ragas? Both are popular ai evals & agent testing tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.
Quick verdict
Both Promptfoo and Ragas are strong ai evals & agent testing choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.
Promptfoo vs Ragas — Side by Side
| Promptfoo | Ragas | |
|---|---|---|
| Category | AI Evals & Agent Testing | AI Evals & Agent Testing |
| Pricing | Free · paid plans by quote | Free |
| Starting price | Free tier available | Free tier available |
| Free tier | ||
| Rating | 4.6 | 4.5 |
| Best for | AI Evals & Agent Testing — evals, red-teaming | AI Evals & Agent Testing — evals, rag |
Pros & Cons
- Free and open source (MIT)
- Best-known red-teaming suite for LLM apps
- Config-file tests that run in CI
- Owned by OpenAI since 2026, so roadmap may follow OpenAI's platform
- YAML configs get long for complex agents
- Team features are Enterprise-only
- The reference metrics for RAG quality
- Generates test sets from your documents
- Free and open source
- Focused on RAG; agent evals still coming
- No hosted dashboard
- LLM-judged metrics cost tokens
Key Features Compared
Promptfoo
- All eval features and providers
- Red teaming: 10K probes / month
- Self-hosting
- CI integration
Ragas
- RAG metrics
- Synthetic test set generation
- Custom metrics
Choose Promptfoo if…
- You want a free tier to validate before paying.
- Free and open source (MIT)
- Best-known red-teaming suite for LLM apps
- Config-file tests that run in CI
Choose Ragas if…
- You want a free tier to validate before paying.
- The reference metrics for RAG quality
- Generates test sets from your documents
- Free and open source
Frequently Asked Questions
Is Promptfoo better than Ragas?⌄
Both Promptfoo and Ragas are strong ai evals & agent testing choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.
What is the difference between Promptfoo and Ragas?⌄
Promptfoo — Open-source CLI for testing prompts, agents and RAG apps, with built-in red teaming for jailbreaks, prompt injection and data leaks. Ragas — Open-source library for evaluating RAG pipelines: faithfulness, context precision and recall, plus synthetic test set generation. Both are ai evals & agent testing tools; the comparison table above breaks down pricing, free tiers, and what each is best for.
Promptfoo vs Ragas: which is cheaper?⌄
Promptfoo pricing: Free · paid plans by quote. Ragas pricing: Free. Confirm current pricing on each tool's official site, as plans change.
Which is rated higher, Promptfoo or Ragas?⌄
In our catalog, Promptfoo rates 4.6 out of 5 and Ragas rates 4.5 out of 5, so Promptfoo has a slight edge on reviews.
See more options in our guide to the best ai evals & agent testing tools for startups.
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