Promptfoo Review & Alternatives (4.5/5)

Promptfoo

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Open-source tool for testing, evaluating, and red-teaming LLM applications across multiple AI models.

★★★★★

4.5(external rating)

#227 in Coding#311 in Automation

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Free🪟 Windows🪟 Mac🪟 Linux🪟 Web

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Overview Features Reviews Alternatives

About Promptfoo

Promptfoo is an open-source CLI and library for evaluating and red-teaming LLM applications. It lets developers test prompts, compare model outputs across GPT, Claude, Gemini, and more with declarative configs. Acquired by OpenAI in 2026, it remains open source and MIT licensed.

Key Features

prompt testing

red teaming

model comparison

ci cd integration

vulnerability scanning

open source

💰 Pricing

Free

Free and open source (MIT license). Cloud offering available with free tier.

Open Source$0

Full CLI and library, MIT licensed

CloudCustom

Hosted evaluation platform for teams

Frequently Asked Questions

Is Promptfoo free?

Yes, Promptfoo is completely free to use. Free and open source (MIT license). Cloud offering available with free tier.

What is Promptfoo used for?

Promptfoo is primarily used for Coding, Automation. Open-source tool for testing, evaluating, and red-teaming LLM applications across multiple AI models.

What platforms does Promptfoo work on?

Promptfoo is available on Windows, Mac, Linux, Web.

What are the best alternatives to Promptfoo?

Top alternatives to Promptfoo include ChatGPT, Claude, GitHub Copilot. These tools offer similar functionality and may suit different budgets or workflows.