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Auth0 vs FastSpring: 2026 Comparison

Auth0 FastSpring
Overview A flexible authentication and authorization platform for building secure login experiences with social, passwordless, and MFA support. A full-service e-commerce and subscription billing platform for software companies acting as merchant of record globally.
Pricing Freemium (Free-$23/1K MAU) Pay_per_use (5.9% + 95c per transaction (or custom))
Key Features
  • Universal Login
  • Social connections
  • MFA
  • Passwordless
  • SSO
  • RBAC
  • Breached password detection
  • Extensibility
  • Merchant of record
  • Global payments
  • Subscription billing
  • Checkout
  • Tax compliance
  • Localization
  • Affiliate management
  • Analytics
Pros
  • Comprehensive auth solution
  • Many social providers
  • Good documentation
  • Flexible rules
  • Full merchant of record
  • Good localization
  • Tax and compliance handled
  • Affiliate management
Cons
  • Expensive at scale
  • Complex pricing
  • Can be overkill
  • Okta acquisition concerns
  • Higher transaction fees
  • Limited checkout customization
  • Smaller ecosystem
  • Payout timing