Trusted by teams at
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 100,000 developers worldwide.
Security-first, developer-friendly
Move quickly with a command-line interface, live reloads, and caching. No SDKs, cloud dependencies, or logins.
Get Started
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.
Get Started
Featured In
Build Hours
"Promptfoo is really powerful because you can iterate on prompts, configure tests in YAML, and view everything locally... it's faster and more straightforward"
Watch the Video →Courses
"Promptfoo offers a streamlined, out-of-the-box solution that can significantly reduce the time and effort required for comprehensive prompt testing."
See the Course →