Auth0 (now part of Okta) is a leading identity and authentication platform that lets developers add login, registration, MFA, SSO, and social login to any application in minutes. It supports hundreds of identity providers, handles security compliance (SOC2, HIPAA, GDPR), and provides developer-friendly SDKs. Auth0 is trusted by thousands of companies to secure millions of users.
Identity platform providing authentication and authorization as a service — the developer-first choice for adding secure login to any application.
Best for: Development teams that need enterprise-grade authentication (SSO, MFA, social login) for B2B SaaS applications without building and maintaining identity infrastructure from scratch
- Free plan
4.5/5 ratingEditorial score 84/100auth0.com
Starts at
Free (25K MAU)
Get started free
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Editorial score84/100
The editorial note
What to know about Auth0
Is it right for you?
Who Auth0 suits
Choose it if
- Development teams that need enterprise-grade authentication (SSO, MFA, social login) for B2B SaaS applications without building and maintaining identity infrastructure from scratch
Look elsewhere if
- Teams with strict data residency requirements — Keycloak or Supabase Auth keep data fully on your servers
What you get
Key features
- Universal Login with customizable UI
- Social login (Google, GitHub, Apple, Facebook, 30+)
- Multi-factor authentication (TOTP, SMS, push)
- Single Sign-On for enterprise
- Machine-to-machine auth for APIs
- Organizations for B2B SaaS multi-tenancy
- Actions — custom logic in auth pipeline
- Anomaly detection and attack protection
Works with
Integrations9
What it costs
Pricing
| Plan | Price | What it includes |
|---|---|---|
| Free | Free (25K MAU)Billed monthly | Up to 25,000 monthly active users with core auth features |
| Essentials | From $23 / monthBilled monthly | Custom domains, social connections, and MFA options |
| Professional | From $240 / monthBilled monthly | Advanced security, enterprise connections, and organizations |
Prices are recorded from the vendor's public pricing page and can change. Check before you buy.
The trade-off
Pros and cons
Pros
- Fastest path to production-grade auth — works in minutes with pre-built UI
- Supports 30+ social login providers (Google, GitHub, Facebook, Apple)
- Handles compliance: SOC2, HIPAA, GDPR, ISO 27001
- Actions allow custom logic at any point in the auth flow
- Generous free tier — up to 7,500 monthly active users
Cons
- Pricing increases sharply beyond the free tier
- Complex advanced configurations can be confusing
- Vendor lock-in risk for deeply integrated applications
- Okta acquisition has caused some product roadmap uncertainty
Quick read
At a glance
- Category
- Cybersecurity & Privacy
- Pricing model
- Freemium
- Entry plan
- Free (25K MAU)
- Free plan
- Available
- Free trial
- Not listed
- Website
- auth0.com
The verdict
Our take on Auth0
Auth0 is the right choice for B2B SaaS applications that need enterprise SSO, complex authentication flows, and reliable identity infrastructure without building it in-house. The developer experience is excellent and the feature set is comprehensive. For consumer applications where you'll have thousands of MAUs, the per-user pricing becomes expensive quickly — Supabase Auth or Clerk are often cheaper alternatives with a similar developer experience.
Editorial review
From the journal
Editorial review of Auth0
Auth0 is the right choice for B2B SaaS applications that need enterprise SSO, complex authentication flows, and reliable identity infrastructure without building it in-house. The developer experience is excellent and the feature set is comprehensive. For consumer applications where you'll have thousands of MAUs, the per-user pricing becomes expensive quickly — Supabase Auth or Clerk are often cheaper alternatives with a similar developer experience.
Where this appears
Mentioned in
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