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Auth0 vs Plunk: 2026 Comparison

Auth0 Plunk
Overview A flexible authentication and authorization platform for building secure login experiences with social, passwordless, and MFA support. Open-source email platform combining transactional emails and marketing campaigns with a developer-friendly approach.
Pricing Freemium (Free-$23/1K MAU) Freemium ($0-custom/mo)
Key Features
  • Universal Login
  • Social connections
  • MFA
  • Passwordless
  • SSO
  • RBAC
  • Breached password detection
  • Extensibility
  • Transactional email
  • Marketing email
  • Open-source
  • API
  • Automation
  • Analytics
  • Contacts
Pros
  • Comprehensive auth solution
  • Many social providers
  • Good documentation
  • Flexible rules
  • Open-source
  • Developer friendly
  • Transactional + marketing
  • Free self-hosted
Cons
  • Expensive at scale
  • Complex pricing
  • Can be overkill
  • Okta acquisition concerns
  • Very new
  • Limited features
  • Small community