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Auth0Carlos AguilarTutorial
Seven Architectural Readiness Checks Before Production Launch
Summary
Auth0’s free tier supports up to 25,000 MAUs for MVPs, but teams must complete seven architecture checks before production launch to avoid blockers. The checks cover Auth0 Organizations for multi-tenancy, Enterprise Connections for SSO, Custom Domains, JIT hash migration, Fine-Grained Authorization, MFA factor progression, and tenant lifecycle management. The free plan caps Organizations at five, Enterprise Connections at one plus unlimited Okta, and MFA at passwordless and passkeys only. Upgrading to B2B Essentials or Professional unlocks unlimited organizations, up to five enterprise connections, and advanced MFA including TOTP, WebAuthn, push, and SMS; Professional also enables Custom Database migration scripts. Teams must add a credit card for Custom Domains, add a secondary admin to prevent tenant deletion after 150 days of inactivity, and note that FGA free trial supports 100 MAUs and 50,000 tuples for prototyping.
Context
Engineering teams building B2B SaaS MVPs on Auth0’s free tier often encounter platform boundaries just before production launch, such as limited organizations, a single enterprise SSO connection, and lack of advanced MFA, forcing last-minute refactoring and delaying releases.
Approach / What changed
The guide recommends seven checks: upgrade from the five-organization cap by moving to B2B Essentials or Professional; expand Enterprise Connections beyond the free limit of one (plus unlimited Okta) by upgrading to Essentials (three) or Professional (five); enable Custom Domains by adding a credit card for DNS/TLS verification; migrate user passwords transparently using JIT hash migration scripts on Professional plans; evaluate Fine-Grained Authorization via the free trial (100 MAUs, 50k tuples); progress MFA from passwordless (free) to TOTP (Essentials), WebAuthn/Push/SMS (Professional), and Adaptive MFA (Enterprise add-on); and prevent tenant deletion after 150 days of inactivity by logging in or adding a secondary admin.
Takeaways
Auth0 free plan limits five Organizations; upgrading to B2B Essentials or Professional unlocks unlimited Organizations for dynamic client onboarding without code changes.
Just-in-Time hash migration via Custom Database Connection on Professional plans lets teams migrate users transparently without forcing password resets, even when raw hashes cannot be exported.
MFA factor progression: free plan supports passwordless and passkeys; Essentials adds TOTP; Professional adds WebAuthn, push, and SMS; Adaptive MFA adds risk-engine signals like impossible travel and untrusted IPs for context-aware challenges.
FAQ
How do I enable a custom domain on Auth0's free plan?
Custom Domains are available on the Free plan, but you must add a credit card in Settings > Payment & Billing to verify DNS and TLS. Do this during sprint planning to avoid delays before launch.
Can I migrate user passwords without asking everyone to reset?
Yes, using Just-in-Time Hash Migration with a Custom Database Connection on the Professional plan. When a user logs in, Auth0 validates credentials against your legacy backend and creates their record transparently, so they never notice the transition.
What happens to inactive free tenants?
Free tenants that remain inactive for 150 days are automatically decommissioned by Auth0. Prevent this by logging in periodically or by adding a secondary administrator under Settings > Tenant Members on day one.
Source and freshness
- Source
- auth0.com
- Published
- Added to Yomu
Summaries are generated from the original by a language model. Check the original before relying on it.
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