---
title: "DeepEval vs Promptfoo: Which is Better in 2026? | App Stack Builder"
description: "DeepEval vs Promptfoo 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/deepeval-vs-promptfoo
retrieved: 2026-10-14
---

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

vs

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

# DeepEval vs Promptfoo: Which is Better in 2026?

AI Evals & Agent Testing

Choosing between [DeepEval](https://appstackbuilder.com/tools/deepeval) and [Promptfoo](https://appstackbuilder.com/tools/promptfoo)? 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 DeepEval and Promptfoo are strong ai evals & agent testing choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

## DeepEval vs Promptfoo — Side by Side

|                | DeepEval                                      | Promptfoo                                     |
| -------------- | --------------------------------------------- | --------------------------------------------- |
| Category       | AI Evals & Agent Testing                      | AI Evals & Agent Testing                      |
| Pricing        | Free · paid from $200/mo                      | Free · paid plans by quote                    |
| Starting price | Free tier available                           | Free tier available                           |
| Free tier      | ✓                                             | ✓                                             |
| Rating         | 4.6                                           | 4.6                                           |
| Best for       | AI Evals & Agent Testing — evals, llm-testing | AI Evals & Agent Testing — evals, red-teaming |

## Pros & Cons

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

[DeepEval](https://appstackbuilder.com/tools/deepeval)

* ✓Feels like unit testing, runs in pytest
* ✓Agent metrics like tool correctness
* ✓Free and open source
* ✗Hosted platform jumps from $0 to $200 / month
* ✗LLM-judged metrics cost tokens on every run
* ✗Python only

![](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

## Key Features Compared

### DeepEval

* ✓50+ metrics
* ✓pytest integration
* ✓Agent and RAG metrics

### Promptfoo

* ✓All eval features and providers
* ✓Red teaming: 10K probes / month
* ✓Self-hosting
* ✓CI integration

### Choose DeepEval if…

* ✓You want a free tier to validate before paying.
* ✓Feels like unit testing, runs in pytest
* ✓Agent metrics like tool correctness
* ✓Free and open source

[DeepEval review & pricing ](https://appstackbuilder.com/tools/deepeval)

### 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)

## Frequently Asked Questions

Is DeepEval better than Promptfoo?⌄

Both DeepEval and Promptfoo 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 DeepEval and Promptfoo?⌄

DeepEval — Open-source, pytest-style framework for unit testing LLM apps and agents, with 50+ metrics. Confident AI is its hosted platform. Promptfoo — Open-source CLI for testing prompts, agents and RAG apps, with built-in red teaming for jailbreaks, prompt injection and data leaks. Both are ai evals & agent testing tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

DeepEval vs Promptfoo: which is cheaper?⌄

DeepEval pricing: Free · paid from $200/mo. Promptfoo pricing: Free · paid plans by quote. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, DeepEval or Promptfoo?⌄

In our catalog, DeepEval rates 4.6 out of 5 and Promptfoo rates 4.6 out of 5 — they are evenly matched.

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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