auth0

**Auth0** is an **identity and authentication platform providing universal authentication and authorization services** — handling secure login, identity management, and single sign-on (SSO) so developers don't have to build authentication from scratch, reducing weeks of security-critical development to hours of configuration. **What Is Auth0?** - **Definition**: Platform for authentication and authorization as a service - **Owner**: Okta (acquired Auth0 in 2021) - **Standards**: Built on OAuth 2.0 and OpenID Connect (OIDC) - **Output**: Returns JWTs (JSON Web Tokens) for stateless authentication **Why Auth0 Matters** - **Security**: No password storage, built-in brute-force protection, breached password detection - **Compliance**: SOC2, HIPAA, GDPR ready out of the box - **Time Savings**: Weeks of development reduced to hours - **Scalability**: Handles millions of users without infrastructure management - **Standards-Based**: OAuth 2.0 and OIDC ensure interoperability **Key Features**: Universal Login, Social Connections (OAuth), Authentication Flow (5 steps) **Security**: No Password Storage, Brute-Force Protection, Breached Password Detection, MFA, Compliance **Advanced Features**: Rules & Actions, Organizations, Machine-to-Machine, Passwordless, Attack Protection **Pricing**: Free (7,500 users), Essentials ($35/mo), Professional ($240/mo), Enterprise (custom) **Best Practices**: Use Universal Login, Enable MFA, Monitor Logs, Rotate Secrets, Test Flows Auth0 is **the industry standard** for authentication — providing enterprise-grade security and compliance out of the box, letting developers focus on core product instead of authentication complexity.