Why We Cancelled Auth0 at 350,000 MAU (And How MojoAuth Saved Us $200K Annually)

This post explains why the author cancelled Auth0 at 350,000 monthly active users and migrated to MojoAuth, citing Auth0's punitive MAU-based pricing, slower support at scale, and mismatched architecture for AI-native usage. The migration to a passwordless-first, OIDC-compliant provider reportedly took three days, improved signup conversion and UX, reduced authentication costs substantially (claimed ~$200K annual savings), and decreased auth-related support overhead.