About Promptfoo | AI Security Experts

Securing the Future of AI

Promptfoo helps developers and enterprises build secure, reliable AI applications.

About Us

We are security and engineering practitioners 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 expertise in engineering, product, and cybersecurity. He has led technical and product teams, and conducted pentests at companies like Microsoft, Shopify, Intercom, and PwC. Most recently he was scaling AI products at Discord.

Vanessa Sauter

Principal Solutions Architect

Vanessa led hundreds of security and privacy reviews for customers at Gong. She has also pentested dozens of enterprises and launched hundreds of bug bounty programs for a leading crowdsourced security company and is published in Forbes, Lawfare, and Dark Reading.