Secure your AI
from prompt to production
Open-source LLM security trusted by 75,000+ users
Adaptive red teaming that targets applications, not just models
Generate customized attacks for your use case:
npx promptfoo@latest redteam initOur language models probe for specific risks in your system.
- Direct and indirect prompt injections
- Jailbreaks tailored to your guardrails
- Data and PII leaks
- Insecure tool use vulnerabilities
- Unauthorized contract creation
- Toxic content generation
- And much more
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.
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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 75,000 developers worldwide.
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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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