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About Auth0
What is Auth0 and what problem does it solve?
Auth0 is an identity-as-a-service platform that handles the entire authentication stack, so developers don't have to build login systems from scratch. It solves the pain of securely managing user identities, sessions, and access policies across web, mobile, and AI agent applications — reducing development time and security risk.
Who is Auth0 for?
Auth0 is best for startups needing fast authentication without security expertise, enterprise teams requiring SSO and compliance (SOC 2, HIPAA, GDPR), and developers building multi-tenant SaaS apps with custom auth flows. It's also built for teams securing AI agents and B2B/B2C tools alike.
Real use cases
Use Auth0 to add single sign-on to an internal dashboard, enable passwordless login for a mobile app, orchestrate tailored customer journeys with adaptive MFA, or secure an AI agent's access to user APIs via Token Vault. It integrates in just 5 minutes with 30+ SDKs and Quickstarts.
Key features
- Universal Login — Pre-built, customizable login pages for web and mobile
- Social login — 30+ providers including Google, Facebook, Apple, GitHub
- Enterprise SSO — SAML, OIDC, LDAP, and Active Directory integration
- Multi-factor authentication — TOTP, SMS, push notifications, and biometrics
- Passwordless — Email magic links, SMS codes, or one-time passwords
- User management dashboard — Search, filter, and manage users with roles and permissions
- Anomaly detection — Brute-force protection, breached password detection, and suspicious login alerts
SaaSpartout Score
7.9
/10
Editorial score from our review methodology — not user ratings.
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Auth0 Pricing
Auth0 pricing: Free · from $35/mo. Billing model: Freemium.
For comparison: the median starting price in Developer Tools is $19.99/month, measured across 278 tools we track. See the full SaaS Pricing Index →
Free — $0/month
Up to 25,000 monthly active users. Includes 1 Custom Domain, Passwordless Authentication, Unlimited Social Connections, 5 Organizations, Brand Customization, Basic Attack Protection, Community Support, 1 Enterprise Connection, Self-Service SSO, and SCIM. No credit card needed.
Essentials — $35/month
Up to 500 monthly active users. Includes everything in Free, plus Pro Multi-Factor Authentication, Role-based Access Control, Per Organization (10 Organizations), Stream Auth0 Audit Logs to Datadog/Splunk/AWS/Azure, separate Production & Development Environments, and Standard Support.
Professional — $240/month
Up to 500 monthly active users. Includes everything in Essentials, plus use your existing User Database for Logins, Enterprise Multi-Factor Authentication, Enhanced Attack Protection, and M2M Tokens.
Enterprise — Contact for pricing
Includes everything in Professional plus Custom User & SSO Tiers, 99.99% SLA, Enterprise Rate Limits, Enterprise Administration & Support, Advanced Security Features, and Add-on Private Deployment. Top-tier SLAs and white-glove support.
Start with a free trial — no credit card required for the Free plan.
Frequently asked questions
Is Auth0 free to use?
Yes, Auth0 offers a Free plan at $0/month for up to 25,000 monthly active users, with no credit card required. It includes passwordless authentication, social connections, brand customization, and basic attack protection.
How much does Auth0 cost?
Auth0 paid plans start at $35/month (Essentials) for up to 500 MAU, and $240/month (Professional) for teams needing added security. Enterprise pricing is available on request. All plans include a free tier to start.
What is Auth0 used for?
Auth0 is an authentication and authorization platform that lets developers add login, single sign-on (SSO), and multi-factor authentication (MFA) to any app. It also secures AI agents, B2B tools, and B2C applications with user management and security policies.
Can I try Auth0 for free as a developer?
Absolutely. Developers can sign up for the Auth0 free trial on the Free plan — no credit card required, with up to 25,000 monthly active users and community support. It's ideal for testing SSO, MFA, and passwordless flows.
What are the best alternatives to Auth0?
Popular Auth0 alternatives include Okta (its parent company), Firebase Authentication, AWS Cognito, Keycloak (open-source), and Clerk. The best choice depends on your scale, budget, and need for pre-built vs. customizable auth.
Does Auth0 support AI agents?
Yes. Auth0 offers Token Vault for managing API calls on behalf of users, async authorization, and fine-grained authorization for RAG pipelines — making it a strong choice for securing AI agents and internal AI tools.
