Auth0 is a security & identity tool for Developers and Enterprise, offered as freemium ($35/mo). Founded in United States in 2013. Popular alternatives include Better Auth, Keycloak, Okta.
About Auth0
Auth0 is a customer identity and access management (CIAM) platform that developers use to add login, sign-up and authorization to their applications. Founded in 2013, it was acquired by Okta in 2021 and now operates as Okta's customer identity product, alongside Okta's workforce identity business. Its job is to handle authentication so product teams do not build password storage, MFA and SSO themselves.
The platform centers on Universal Login, a hosted login page that supports social providers, enterprise connections (SAML, OIDC, Active Directory), passwordless email and SMS, passkeys and multi-factor authentication. Organizations support B2B multi-tenancy where each customer brings its own identity provider, Actions let teams run custom code in login and registration flows, and Fine-Grained Authorization handles relationship-based permissions. Attack protection covers bot detection, breached password checks and brute-force limits. The free plan was expanded in 2024 to 25,000 monthly active users; paid tiers are priced by MAU and features, and enterprise connections push buyers into higher plans quickly.
Auth0 fits B2B SaaS companies selling to enterprises that demand SSO, and consumer apps with large user bases and compliance requirements. It is less attractive for small teams that want drop-in UI components and predictable pricing: Clerk is simpler for React and Next.js apps, while Keycloak and Better Auth give full ownership without per-user fees.
Key features of Auth0
- Universal Login with social, enterprise and passwordless
- MFA, passkeys and adaptive attack protection
- Organizations for B2B multi-tenant SSO
- Fine-grained authorization and RBAC
- Actions for custom flows and integrations
- SDKs for web, mobile and backend
Pros and cons
Pros
- Generous free tier (25k MAU)
- Enterprise SSO and compliance depth
- Reliable at huge scale
- Comprehensive SDKs
Cons
- Expensive once beyond free or with enterprise connections
- Complex configuration
- UI customization takes effort
- Okta ownership slows some innovation
Auth0 pricing
Auth0 uses a freemium model.
| Plan | Price | Includes |
|---|---|---|
| Free | $0 | Up to 25,000 MAU, 1 custom domain, community support |
| Essentials | $35 / mo | B2C, 500 MAU base; B2B from $150/mo; yearly = 11x monthly |
| Professional | $240 / mo | B2C, 500 MAU base; B2B from $800/mo; 12 tenants |
| Enterprise | Custom | 99.99% SLA, 30-day log retention |
Source: auth0.com · checked on Oct 20, 2026
How Auth0 compares in Security & identity
- Rank by votes
- #1 / 24
- Starting price
- $35
- Free alternatives
- 3
0 votes from members
338% above the category median ($8/mo)
Free or open-source tools in Security & identity
Auth0 ranks #1 of 24 security & identity tools by community votes and is priced above most tools in the category.
Common use cases
- 1B2B SaaS offering SSO to enterprise customers
- 2Consumer app needing social login and MFA at scale
- 3Regulated application requiring compliance
- 4Multi-app identity across a company's products
Best for
Companies with enterprise SSO requirements or large consumer user bases.
Not ideal for
Early-stage React apps wanting prebuilt UI (Clerk) or teams wanting self-hosted ownership (Better Auth, Keycloak).
Integrations
- Any OAuth/OIDC/SAML app
- Okta Workforce
- Azure AD
- Apple
- Salesforce
- AWS
- Zapier
- Webhooks (Actions)
Our take
Auth0's free tier is now generous enough for most startups, and nothing beats it for enterprise SSO. Model costs before you grow past the free tier.
FAQ
- What is Auth0?
- Auth0 is a Security & identity tool: Identity platform for applications.
- How much does Auth0 cost?
- Auth0 uses a Freemium model; paid plans start at $35 per month.
- What are the best alternatives to Auth0?
- Community-listed alternatives to Auth0 include Better Auth, Keycloak, Okta.
- What does Auth0 integrate with?
- Auth0 integrates with Any OAuth/OIDC/SAML app, Okta Workforce, Azure AD, Google, Apple, Salesforce and more.
- Which platforms does Auth0 support?
- Auth0 is available on web.
- Who is Auth0 for?
- Companies with enterprise SSO requirements or large consumer user bases.
Alternatives to Auth0
Okta
▲ 0Enterprise identity platform for SSO, MFA and user lifecycle
Paid · $6EnterpriseSmall businesses
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