kitio.aiPromptfoo vs Ragas
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Ragas is completely free, while Promptfoo is freemium.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Config-based test cases
- Model comparison
- Red-team scans
- CI integration
- Web results viewer
- RAG quality metrics
- Agent evaluation
- Synthetic test generation
- Framework integrations
- CI-friendly runs
| Feature | Promptfoo | Ragas |
|---|---|---|
| Best for | Open-source CLI for testing prompts and red-teaming AI apps | Open-source metrics and test data for evaluating RAG and agents |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Free |
| Starting price | See pricing page | Free |
| Free plan | Yes | Yes, fully free |
| Made by | OpenAI | Vibrant Labs |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Ragas is completely free, while Promptfoo is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
2 plans
Community
Free
- Open source
- All LLM evaluation features
- Red teaming (10k probes/month)
- Run locally or self-host
Enterprise
Contact sales
- Reports and continuous monitoring
- Issue tracking and remediation
- Dedicated runner
- Assigned deployment engineer
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Promptfoo
- Free and works with any provider
- Strong security testing
- Fits developer workflows
- Owned by a model vendor now
- CLI-first may not suit everyone
- Enterprise pricing not public
Ragas
- Free and widely used
- Research-backed metrics
- Generates test data
- LLM-judge metrics cost tokens
- API changes between versions
- No hosted dashboard included
Which one should you choose?
Choose Promptfoo if you want:
- Free and works with any provider
- Strong security testing
- Fits developer workflows
Watch out: owned by a model vendor now.
Choose Ragas if you want:
- Free and widely used
- Research-backed metrics
- Generates test data
Watch out: llm-judge metrics cost tokens.
Promptfoo vs Ragas FAQ
What is the difference between Promptfoo and Ragas?
Promptfoo: Open-source CLI for testing prompts and red-teaming AI apps. Ragas: Open-source metrics and test data for evaluating RAG and agents. Both are models & apis tools.
Is Promptfoo or Ragas cheaper?
Ragas is completely free, while Promptfoo is freemium.
Do Promptfoo and Ragas have free plans?
Promptfoo: Yes. Ragas: Yes, fully free.
Who makes Promptfoo?
Promptfoo is made by OpenAI, based in United States.
Who makes Ragas?
Ragas is made by Vibrant Labs.
Which should I choose, Promptfoo or Ragas?
Choose Promptfoo if you value free and works with any provider and strong security testing. Choose Ragas if you value free and widely used and research-backed metrics.