Authorization middleware

2 reusable Authorization middleware libraries across every platform — libraries, SDKs, and drop-in systems. You should never have to know which ecosystem it lives in.

• Auth0

  by Okta · Free tier + paid · Commercial · middleware

  Identity platform: authentication, SSO, and authorization as a service via SDKs and APIs.

  AuthenticationAuthorization   WebNode.jsReactAndroidiOS

• rust-auth

  by bymaxone · Free · github

  Full-stack authentication library for Rust (Axum 0.8), React 19 & Next.js 16 — JWT, MFA, OAuth, sessions, multi-tenant SaaS ready. Pure-Rust crypto with WebAssembly edge verification.

  AuthenticationAuthorization   RustReactWeb