Is Auth0 worth the price?
6.5/10
Auth0's free tier at 25,000 MAUs is the most generous in the identity space — far ahead of Firebase Auth (free at 50K MAUs but with fewer features) and Clerk (500 MAUs free).
The Essentials plan at $35/month (B2C) or $150/month (B2B) is reasonable for early growth. The problem is the scaling curve: once you exceed base MAU limits, the $0.07/MAU overage rate creates exponential cost growth.
A B2C app with 50,000 MAUs pays $35 + $3,465 in overages = ~$3,500/month. The B2B plans are even steeper — Professional at $800/month with a hard cap of 5 enterprise SSO connections means your sixth enterprise customer forces an Enterprise contract (typically $10,000+/month).
Auth0 is excellent technology with a pricing model that penalizes growth, so plan your migration threshold carefully.
Pricing Plans
Free TrialFree
Free
Getting started
- 7,500 MAUs
- Unlimited logins
- Social connections
- Custom domain
Essentials
$35/per month
Basic needs
- 7,500 MAUs included
- Action logs
- Custom DB connections
- Email support
Professional
$240/per month
Growing apps
- 10,000 MAUs included
- MFA
- Organizations
- SSO integrations
- Priority support
Enterprise
Custom
At scale
- Unlimited MAUs
- Enterprise MFA
- Adaptive MFA
- 99.99% SLA
- Dedicated support
Hidden Costs & Gotchas
Overage pricing at $0.07/MAU applies per user beyond the base limit. This was increased 300% from the previous $0.023/MAU rate — a 50,000-MAU B2C app on Essentials pays ~$3,500/month, not $35.
B2B Essentials limits you to 3 enterprise SSO connections and Professional to 5. Each enterprise customer that requires SSO consumes one connection — signing your sixth enterprise client forces an upgrade to Enterprise pricing (typically $10,000+/month).
SMS-based MFA is not included in the base price. At scale, SMS verification costs roughly $0.0083 per message — a 100,000-MAU app sending one MFA text per user per month adds ~$830/month.
The free plan lacks separate development and production environments. Running auth against production data during development is a real compliance and security risk that most teams eventually pay to fix.
Custom database connections and Machine-to-Machine (M2M) tokens are only available on Professional and above — not Essentials. Many B2B apps need M2M tokens for service-to-service auth.
Auth0 Actions (serverless extensibility) have execution limits that vary by plan. High-traffic apps may need to upgrade plans purely to avoid Action throttling, not for MAU reasons.
Migrating away from Auth0 is painful. User password hashes are not exportable in most configurations, meaning a migration requires forcing all users to reset passwords — a significant churn event.
Which Plan Do You Need?
Early-stage startups and side projects that need production-grade auth without paying anything — the free plan supports 25,000 MAUs with social login, passwordless, and custom domains
B2C apps scaling to 10,000+ users that need MFA, RBAC, and separate dev/prod environments ($35/month Essentials, then $0.07/MAU overage)
B2B SaaS companies selling to enterprises that require SSO and organization management — but only if you need fewer than 5 enterprise connections ($150-800/month Professional)
Our Recommendation
startup
Start on Free, move to Essentials ($35/month B2C or $150/month B2B) when you need MFA or dev/prod separation. Calculate your projected MAU cost at $0.07/MAU before committing — if you expect to exceed 10,000 MAUs quickly, compare with Clerk's more linear pricing model.
enterprise
Enterprise pricing is custom but typically starts at $10,000+/month. Negotiate hard on MAU overage rates and SSO connection limits — Auth0 has flexibility here. Always get quotes from WorkOS and Okta Customer Identity simultaneously. The strongest leverage is the threat of migrating to an open-source solution like Keycloak or Supertokens.
freelancer
The free plan at 25,000 MAUs is unbeatable for side projects and MVPs. You get social login, passwordless auth, and custom domains at zero cost. Do not upgrade until you actually need MFA or separate environments.
small Business
B2B Professional at $800/month works until you hit the 5-SSO-connection ceiling. If enterprise SSO is your primary need, evaluate WorkOS ($49/connection/month) — it scales more predictably for B2B use cases.
How Auth0 Compares to Competitors
Clerk is the closest direct competitor for developer-friendly auth: simpler pricing ($0.05/MAU with no steep tiers), modern UI components, and faster integration. Auth0 wins on enterprise features, compliance certifications, and ecosystem breadth. WorkOS specializes in B2B SSO and SCIM — if enterprise connections are your bottleneck, WorkOS at $49/connection/month is dramatically cheaper than Auth0's tier-gated model. Firebase Auth is free up to 50K MAUs for basic email/social login but lacks Auth0's advanced features (Organizations, RBAC, Actions). Supertokens and Keycloak are open-source alternatives that eliminate per-MAU costs entirely but require self-hosting and more engineering investment. For B2C apps that will scale past 50,000 MAUs, the total cost of ownership favors Clerk or self-hosted solutions over Auth0.
