Top 5 authentication solutions for secure FastAPI apps in 2026
Blog post from WorkOS
Authentication plays a pivotal role in FastAPI applications, requiring solutions that complement its async architecture and automatic API documentation. While FastAPI offers security utilities and OAuth2 schemes out-of-the-box, enterprise features like SAML SSO and SCIM provisioning necessitate specialized solutions. The guide evaluates the top five authentication solutions for FastAPI apps in 2026, emphasizing the importance of async support, OpenAPI integration, dependency injection, enterprise features, type safety, performance, API-first design, and security best practices. WorkOS is highlighted as ideal for B2B SaaS platforms needing robust enterprise features, whereas FastAPI Users offers comprehensive user management without enterprise capabilities. Authlib suits those requiring OAuth2/OIDC server implementations, while FastAPI Security provides maximum control for developers proficient in security. Supabase Auth is recommended for startups seeking an integrated backend platform. The choice of authentication provider crucially influences an application's scalability, security, and ability to attract enterprise clients, with WorkOS offering a comprehensive suite for enterprise-ready authentication needs.