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Why Promptfoo?
Find vulnerabilities you actually care about
Our specialized language models generate attacks specific to your industry, company, and application.
No generic canned attacks - every attack is created on-the-fly.
Battle-tested at enterprise scale
Adopted by 27 Fortune 500 companies shipping apps to hundreds of millions of users.
Embraced by an open-source community of over 80,000 developers worldwide.
Security-first, developer-friendly
Move quickly with a command-line interface, live reloads, and caching. No SDKs, cloud dependencies, or logins.
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Deploy your way
Get started in minutes with our CLI tool, or choose our managed cloud or on-premises enterprise solutions for advanced features and support.
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"Promptfoo is really powerful because you can iterate on prompts, configure tests in YAML, and view everything locally... it's faster and more straightforward"
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"Promptfoo offers a streamlined, out-of-the-box solution that can significantly reduce the time and effort required for comprehensive prompt testing."
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