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Auth0 vs Flagsmith: 2026 Comparison

Auth0 Flagsmith
Overview A flexible authentication and authorization platform for building secure login experiences with social, passwordless, and MFA support. An open-source feature flag and remote config service with A/B testing and analytics for managing feature releases.
Pricing Freemium (Free-$23/1K MAU) Freemium (Free-$45/seat/month)
Key Features
  • Universal Login
  • Social connections
  • MFA
  • Passwordless
  • SSO
  • RBAC
  • Breached password detection
  • Extensibility
  • Feature flags
  • Remote config
  • A/B testing
  • Segments
  • Audit logs
  • Open source
  • Self-hosted
  • Analytics
Pros
  • Comprehensive auth solution
  • Many social providers
  • Good documentation
  • Flexible rules
  • Open source
  • Self-hosted option
  • Affordable
  • Good feature set
Cons
  • Expensive at scale
  • Complex pricing
  • Can be overkill
  • Okta acquisition concerns
  • Smaller community
  • Fewer SDKs
  • Limited A/B testing
  • Newer platform