DeepEval vs Promptfoo: Which is Better in 2026?
Choosing between DeepEval and 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
- 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
- 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
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
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.
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