# Whatever You Are Building, Auth0 Has a Plan

[Auth0](https://yomu.fyi/company/auth0) · Ruhma Khawaja · Aug 25, 2026

**Type:** Explainer

## Summary

Authentication and identity requirements vary substantially as software organizations scale from solo builders to multi-brand enterprises. Building and maintaining authentication in-house frequently consumes valuable engineering cycles and incurs ongoing costs associated with security patching and edge cases. To address these distinct development stages, Auth0 structures its platform across Free, Essentials, Professional, and Enterprise tiers with differentiated B2C and B2B pricing. Early-stage and growing teams gain access to enterprise connections, SCIM user synchronization, and multi-tenant routing through Auth0 Organizations. Larger customer deployments utilize features like multi-app Single Sign-On and passwordless logins, which have driven reported outcomes such as a 20% conversion lift and a 66% reduction in identity management time.

## Context

Builders face differing identity requirements as they scale, ranging from rapid initial authentication setup to enterprise Single Sign-On and SOC 2 compliance. Developing identity solutions in-house can distract engineering teams from core product work and introduces long-term costs for security patching, edge-case handling, and multi-app integration.

## Approach / What changed

Auth0 provides tiered authentication plans (Free, Essentials, Professional, and Enterprise) mapped to growth stages. Features scale from free SCIM and SAML/Entra connections to multi-tenant routing via Auth0 Organizations, multi-app Single Sign-On, passwordless authentication, and enterprise capabilities like 99.99% uptime SLAs and HIPAA/BAA support.

## Takeaways

- Auth0 Free Plan includes up to 25,000 monthly active users, five customer organizations, SCIM automatic user synchronization, and one Enterprise Connection for Okta, SAML, or Microsoft Entra ID.
- Arduino utilized Auth0 multi-app Single Sign-On and social logins across more than 19 web applications for approximately two million active users, producing a 20% conversion lift.
- RSG Group consolidated disconnected identity systems across multiple brands using Auth0 passwordless login, decreasing identity management time by 66% and reducing new use case launch time by 80%.

**Tags:** [Authentication](https://yomu.fyi/topic/authentication), [Developer Experience](https://yomu.fyi/topic/developer-experience), [Scalability](https://yomu.fyi/topic/scalability)

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