Identity platform for developers
Visit WebsiteThe Bottom Line
Entry price
From $35/mo (free plan available)
Biggest pro
Easy integration
Biggest con
Expensive at scale
TL;DR - Auth0
- Industry-leading identity platform
- Authentication and authorization as a service
- Trusted by 14,000+ companies
What is Auth0?
Available on: Web
Pros & Cons
Pros
- Easy integration
- Many features
- Great docs
Cons
- Expensive at scale
- Complex pricing
Ratings Across the Web
Auth0 holds an aggregate rating of 4.5 out of 5 from 420 reviews across G2 and Capterra, last checked August 25, 2026.
Ratings aggregated from independent review platforms. Learn more
Key Features
Pricing Plans
Free TrialPricing checked Aug 19, 2026
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
Is Auth0 worth the price?
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.
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.
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.
How Auth0's pricing compares
At $240/mo, Auth0 is the most premium of its 4 direct competitors.
Entry paid plan, monthly. Pricing checked Aug 19, 2026.
Reviews
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Best Auth0 Alternatives
Top alternatives based on features, pricing, and user needs.
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Still deciding?
Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.
Explore More
Auth0 FAQ
How does Auth0 simplify the implementation of authentication for developers?
Which teams would benefit most from using Auth0?
Can Auth0 support various login methods for users?
How is Auth0 priced?
What kind of trade-offs should be considered when choosing Auth0?
How does Auth0 compare to Firebase Authentication?
Source: auth0.com