Auth0 Platform vs Duo Multi-Factor Authentication: Side-by-Side Comparison (2026)

Auth0 Platform

Developer teams building customer-facing applications need Auth0 Platform because it eliminates the authentication infrastructure tax, letting engineers ship passwordless login and adaptive MFA without building IAM from scratch. The platform covers NIST CSF 2.0 PR.AA identity and access control requirements across cloud deployments at scale, and its Organizations feature handles B2B multi-tenancy patterns that otherwise require months of custom work. Skip this if your priority is on-premises federation or you need deep authorization policy engines; Auth0's fine-grained authorization APIs are solid but secondary to its authentication strength.

Duo Multi-Factor Authentication

Teams prioritizing frictionless adoption across mixed device ecosystems should start with Duo Multi-Factor Authentication; its push-based approval model converts skeptical end users faster than SMS or TOTP alone, which matters when you're racing against internal resistance. The platform covers NIST CSF 2.0's PR.AA authentication requirement and ships with straightforward integrations for common SaaS and on-prem applications, reducing deployment friction in mid-market environments. Skip this if you need passwordless authentication as your primary mechanism or require deep integration with legacy mainframe systems where Duo's cloud-native design creates friction.