When to use OAuth2: Scaling auth for the enterprise

Managing user authentication and authorization becomes complex for large organizations as they expand, necessitating a standards-based approach like OAuth2 combined with a robust identity management system such as Ory Kratos. Ory Kratos excels in user identity lifecycle management, while Ory Hydra provides OAuth2's industry-standard authorization, offering extensive SDK support across languages and platforms, streamlining integration, and ensuring architectural flexibility. OAuth2's standardized approach, including flows like the Authorization Code Grant with PKCE and Client Credentials Grant, simplifies integration with diverse systems, providing granular control through scopes and facilitating smooth transitions during mergers and acquisitions. A combined Ory Kratos and Ory Hydra architecture is recommended from the outset for large enterprises, as it offers a scalable, future-proof solution that simplifies operations, supports growth, and maintains consistent user and developer experiences. This approach is particularly beneficial for complex environments like financial institutions, where multi-client integration and machine-to-machine communication are crucial.