Securing the Future of AI
Promptfoo helps developers and enterprises build secure, reliable AI applications.
About Us
We are security and engineering practioners who have scaled generative AI products 100s of millions of users. We're building the tools that we wished we had when we were on the front lines.
Based in San Mateo, California, we're backed by Andreessen Horowitz and top leaders in the technology and security industries.
Meet the team
Ian Webster
CEO & Co-founder
Ian previously led LLM engineering and developer platform teams at Discord, scaling AI products to 200M users while maintaining rigorous safety, security, and policy standards.
Michael D'Angelo
CTO & Co-founder
Michael brings extensive experience in AI and engineering leadership. As the former VP of Engineering and Head of AI at Smile Identity, he has a track record of scaling ML solutions to serve over 100 million people across hundreds of enterprises.
Steve Klein
Staff Engineer
Steve brings decades of experience in engineering, product development, and security. Most recently, he scaled AI products at Discord.
Backed by Industry Leaders
We're honored to have the support of top investors and industry experts who share our vision for open-source, application-focused AI security.
Zane Lackey
General Partner, Andreessen Horowitz Founder, Signal Sciences
Joel de la Garza
Investment Partner, Andreessen Horowitz CISO, Box
Tobi Lutke
CEO, Shopify
Stanislav Vishnevskiy
CTO, Discord
Frederic Kerrest
Vice-Chairman & Co-Founder, Okta
Adam Ely
EVP, Head of Digital Products, Fidelity CISO, Fidelity
An Incredible Open Source Community
Promptfoo is proud to be supported by a vibrant community of over 100 open source contributors.
Click on the image to view all contributors
Ready to Secure Your AI Applications?
Join leading enterprises who trust Promptfoo to fortify their AI applications.
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