# How Promptfoo Deployed Enterprise Authentication for Fortune 500 Customers Using FusionAuth

DevFeed: [How Promptfoo Deployed Enterprise Authentication for Fortune 500 Customers Using FusionAuth](<https://devfeed.tech/articles/from-zero-to-fortune-500-how-promptfoo-deployed-enterprise-ai-security-in-one-week-43443.md>)

Original publisher: [Read original article](<https://fusionauth.io/blog/promptfoo-case-study>)

Author: Brad McCarty

Published: 2025-12-08T00:00:00Z

Content type: article

Language: en

Sources: [FusionAuth Blog](<https://devfeed.tech/sources/fusionauth-blog.md>)

Topics: [ai security](<https://devfeed.tech/topics/ai-security.md>), [Single sign-on (SSO)](<https://devfeed.tech/topics/sso.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [Security](<https://devfeed.tech/topics/security.md>), [saml](<https://devfeed.tech/topics/saml.md>), [Large Language Model](<https://devfeed.tech/topics/llm.md>), [OpenID connect (OIDC)](<https://devfeed.tech/topics/oidc.md>)

Tags: [ai-security](<https://devfeed.tech/tags/ai-security.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [customers](<https://devfeed.tech/tags/customers.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [enterprise](<https://devfeed.tech/tags/enterprise.md>), [oidc](<https://devfeed.tech/tags/oidc.md>), [saml](<https://devfeed.tech/tags/saml.md>), [security](<https://devfeed.tech/tags/security.md>), [sso](<https://devfeed.tech/tags/sso.md>)

## AI overview

This case study describes how Promptfoo, an AI security startup, addressed complex enterprise authentication requirements for Fortune 500 customers using FusionAuth. It covers SSO, SAML, OIDC, on-premise and air-gapped deployments, role mapping, and tight implementation deadlines.

## Source excerpt

Learn how Promptfoo, an AI security startup, deployed enterprise-grade authentication for Fortune 500 customers in just one week using FusionAuth. From 3 to 12 enterprise clients with complex SSO, SAML, and on-premise requirements--all managed by a single engineer.