SAML and OAuth are both Single Sign-On (SSO) technologies that help improve user experience and simplify credential management. SAML is a standardized framework for federating identity, allowing users to access multiple services with one login. It defines the flow of information between three entities: User, Service Provider, and Identity Provider. SAML focuses on authentication, while each service provider executes its own authorization process. OAuth, on the other hand, is an open-standard framework that lets internet-based services exchange limited information over HTTP/HTTPS on a user's behalf. It allows users to delegate access authorization to another service, eliminating deep integrations and protecting users' credentials. While both technologies support SSO, they come at it from different directions: SAML federates identity and reduces friction with authentication, while OAuth lets an already-authenticated user delegate authorization. Companies can use either technology or a combination of both, depending on their needs. SAML is suitable for enterprise SSO, while OAuth is often used in B2C or B2B projects serving a general population of users where user identity is not important. Twingate's approach to Zero Trust security integrates existing security stacks with Software-Defined Perimeters and offers SAML authentication, OAuth authorization, and more.