Independent pricing analysis. Not affiliated with Auth0 or Okta. Prices may change without notice.
Auth0 Pricing
Updated 30 March 2026
Free to 7,500 MAU, then $35 to $240+ per month based on a model that is easy to miscalculate. MAU-based pricing means your auth bill scales with growth. The B2C vs B2B pricing split, social login costs, and enterprise features make the real cost hard to predict. We break it down.
$0
Free
7,500 MAU
$35
Essentials
500 MAU incl.
$240
Professional
1,000 MAU incl.
Custom
Enterprise
Volume pricing
Auth0 Plans and Pricing
Every plan, every feature, every limitation. No hidden details.
Free
7,500 MAU
- 7,500 Monthly Active Users
- 2 social identity providers
- Basic email/password authentication
- Basic MFA (TOTP only)
- Auth0-branded login pages
- Community support only
- No custom domains
- No Organizations (multi-tenant)
- 1,000 M2M tokens/month
Best for: Side projects, MVPs, and apps under 7,500 users
Essentials
500 external MAU included
- 500 external MAU included
- ~$0.07 per additional MAU
- 5 social identity providers
- Custom domains
- Basic MFA methods
- Standard support (email)
- Universal Login customization
- User roles (up to 50 roles)
- 1,000 M2M tokens/month
Best for: B2C apps that need custom branding and more social logins
Most Popular for B2B
Professional
1,000 external MAU included
- 1,000 external MAU included
- ~$0.07-$0.15 per additional MAU
- Unlimited social providers
- Organizations for B2B multi-tenant
- Enterprise connections (SAML, OIDC)
- Advanced MFA (WebAuthn, push)
- Custom database connections
- Advanced attack protection (breached password, bot, suspicious IP)
- Priority support
Best for: B2B SaaS products that need enterprise SSO and organizations
Enterprise
Custom volume
- Custom MAU pricing (volume discounts)
- 99.99% uptime SLA
- Private cloud deployment option
- Dedicated tenant infrastructure
- Advanced compliance (HIPAA, SOC 2, FedRAMP)
- Dedicated Customer Success Manager
- 24/7 premium support
- Custom contract terms
- Unlimited M2M tokens
Best for: Regulated industries, high-volume applications, enterprise requirements
MAU Pricing Explained
What Counts as a Monthly Active User
A Monthly Active User is any unique user who authenticates at least once during a 30-day billing period. This includes any authentication method: social login, email/password, passwordless (magic links, SMS codes), or enterprise SSO. The key insight is that MAU counts logins, not signups. A user who signed up two years ago but logged in this month counts as a MAU.
Auth0 deduplicates across devices and sessions. If the same user logs in from their phone, laptop, and tablet in the same month, they count as one MAU. However, if you have separate Auth0 tenants for different applications, the same person logging into two different apps would count as two MAU (one per tenant).
Inactive users cost nothing. If someone created an account but has not logged in for 6 months, they are not a MAU. This is good for most applications, but creates unpredictability for seasonal businesses where MAU can spike dramatically during peak months (e.g., a tax preparation app in March/April).
How MAU Tiers Scale
On the Essentials plan, the base price of $35/month includes 500 external MAU. Beyond that, additional MAU cost roughly $0.07 each. This means 5,000 MAU costs approximately $350/month (not $35). The jump from 500 to 5,000 MAU increases your bill tenfold.
On the Professional plan, the $240/month base includes 1,000 external MAU. Additional MAU cost $0.07 to $0.15 each depending on volume. The per-MAU rate increases at higher volumes because Auth0 assumes higher-volume customers are getting more value from features like Organizations and enterprise connections.
At very high volumes (100,000+ MAU), Auth0 typically moves customers to negotiated Enterprise agreements with custom per-MAU rates, volume discounts, and multi-year commitments. The published per-MAU pricing becomes less relevant at this scale.
Internal vs External Users
Auth0 distinguishes between external users (your customers) and internal users (your employees). External users are priced on the MAU model described above. Internal users are typically managed through Okta Workforce Identity (the employee SSO product) rather than Auth0.
If you use Auth0 for both customer-facing authentication and employee login, be aware that employees count toward your MAU. A company with 200 employees who log into internal tools daily will consume 200 MAU from your allocation. At $0.07 per extra MAU on Essentials, that is an additional $14/month, which is manageable, but it is something to account for in your cost projections.
The B2C vs B2B Pricing Trap
The most common pricing surprise with Auth0 happens to B2B SaaS startups. Here is the scenario that catches people off guard:
Phase 1: Development (Free plan)
You start building a B2B SaaS product. Auth0's free tier handles your dev environment and early beta users perfectly. You have fewer than 7,500 MAU and everything works. Cost: $0/month.
Phase 2: First Enterprise Customer
Your first enterprise customer requires SAML SSO (their IT department mandates it for all SaaS vendors). SAML enterprise connections require the Professional plan. You jump from $0 to $240/month instantly, regardless of your MAU count. This is not a gradual upgrade path.
Phase 3: Multi-Tenant Growth
You need the Organizations feature to properly manage multi-tenant B2B customers (separate user pools, invitation flows, team management per customer). Organizations is a Professional-only feature. Even if you only have 500 MAU, you are paying $240/month minimum because you need B2B features, not because you have a lot of users.
The takeaway: B2C pricing scales gradually with MAU. B2B pricing jumps to $240/month the moment you need any enterprise feature, regardless of your user count. If you are building B2B software, budget for the Professional plan from day one.
Auth0 vs Clerk Pricing
Auth0
- Free: 7,500 MAU
- Essentials: $35/mo + ~$0.07/MAU beyond 500
- Professional: $240/mo + ~$0.07-$0.15/MAU beyond 1,000
- Enterprise: Custom pricing
Auth0 wins on enterprise features: SAML/OIDC connections, Organizations for multi-tenant B2B, advanced attack protection (breached password detection, bot detection, suspicious IP throttling), compliance certifications (SOC 2, HIPAA, FedRAMP for enterprise), and breadth of authentication methods.
Clerk
- Free: 10,000 MAU
- Pro: $25/mo + $0.02/MAU beyond 10,000
- Enterprise: Custom pricing
Clerk wins on developer experience: pre-built React/Next.js components, beautiful default UI, faster integration (hours vs days), more generous free tier (10,000 vs 7,500 MAU), and dramatically lower per-MAU cost. At 50,000 MAU, Clerk costs $825/mo while Auth0 Essentials costs $3,500/mo.
Auth0 vs Firebase Auth Pricing
Auth0
Auth0 charges from the moment you exceed 7,500 MAU on the free tier, or from the first user if you need features beyond the free plan. At 50,000 MAU, Essentials costs approximately $3,500/month. Auth0 provides more authentication methods, better enterprise support, and compliance certifications that Firebase lacks.
Firebase Auth
Firebase Authentication is free for up to 50,000 MAU. That is nearly 7x Auth0's free tier. Beyond 50,000 MAU, Firebase's Identity Platform charges $0.0055 per MAU. At 100,000 MAU, Firebase costs approximately $275/month versus Auth0's $7,000+/month. The tradeoff is fewer enterprise features: no built-in RBAC, limited social login configuration on free tier, and no SAML support without Identity Platform upgrade.
Total Cost by MAU Scale
How auth costs grow with your application. Auth0 vs Clerk vs Firebase at every scale.
| MAU | Auth0 Essentials | Auth0 Professional | Clerk | Firebase |
|---|---|---|---|---|
| 1,000 | $35/mo | $240/mo | $0/mo | $0/mo |
| 5,000 | $350/mo | $520/mo | $0/mo | $0/mo |
| 10,000 | $700/mo | $870/mo | $25/mo | $0/mo |
| 25,000 | $1,750/mo | $1,920/mo | $325/mo | $0/mo |
| 50,000 | $3,500/mo | $3,670/mo | $825/mo | $0/mo |
| 100,000 | $7,000/mo | $7,170/mo | $1,825/mo | $275/mo |
| 500,000 | Enterprise | Enterprise | $9,825/mo | $2,475/mo |
Auth0 Essentials and Professional estimates based on published per-MAU rates. Clerk pricing based on Pro plan ($25/mo + $0.02/MAU beyond 10K). Firebase pricing based on Identity Platform ($0.0055/MAU beyond 50K free). Actual costs may vary by negotiation and add-ons.
Auth0 Cost Projection Calculator
Enter your current MAU and growth rate to project auth costs over 6, 12, and 24 months. Compare Auth0 against Clerk and Firebase Auth at every stage.
Recommended Plan
Free
Based on 5,000 MAU, B2C use case
| Timeframe | MAU | Auth0 | Clerk | Firebase |
|---|---|---|---|---|
| Today | 5,000 | $0/mo | $0/mo | $0/mo |
| 6 months | 5,244 | $0/mo | $0/mo | $0/mo |
| 12 months | 5,500 | $0/mo | $0/mo | $0/mo |
| 24 months | 6,050 | $0/mo | $0/mo | $0/mo |
Auth0 First Year
$0
Free
Clerk First Year
$0
Pro plan
Firebase Auth First Year
$0
Identity Platform
Auth0 costs are estimates based on published pricing tiers. Actual costs may vary depending on negotiated rates, add-ons, and enterprise agreements. Clerk and Firebase pricing based on their published rate cards as of March 2026.