---
title: "Promptfoo vs Ragas: Which is Better in 2026? | App Stack Builder"
description: "Promptfoo vs Ragas compared for 2026 — pricing, free tiers, features, pros & cons. See which ai evals & agent testing tool is the better fit for your startup."
source: https://appstackbuilder.com/compare/promptfoo-vs-ragas
retrieved: 2026-10-14
---

![](https://www.google.com/s2/favicons?domain=promptfoo.dev&sz=128)

vs

![](https://www.google.com/s2/favicons?domain=ragas.io&sz=128)

# Promptfoo vs Ragas: Which is Better in 2026?

AI Evals & Agent Testing

Choosing between [Promptfoo](https://appstackbuilder.com/tools/promptfoo) and [Ragas](https://appstackbuilder.com/tools/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

![](https://www.google.com/s2/favicons?domain=promptfoo.dev&sz=128)

[Promptfoo](https://appstackbuilder.com/tools/promptfoo)

* ✓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

![](https://www.google.com/s2/favicons?domain=ragas.io&sz=128)

[Ragas](https://appstackbuilder.com/tools/ragas)

* ✓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

[Promptfoo review & pricing ](https://appstackbuilder.com/tools/promptfoo)

### 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

[Ragas review & pricing ](https://appstackbuilder.com/tools/ragas)

## 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](https://appstackbuilder.com/categories/ai-evals).

## Still not sure which to pick?

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