Auth0
Developer-first CIAM with a free tier up to 25,000 MAUs
What is Auth0?
Auth0, now part of Okta, is a developer-first authentication and authorization platform that handles Universal Login, SSO, MFA, passwordless, M2M auth, fine-grained authorization, and Token Vault for agent credential delegation. It ships 30+ SDKs and runs 10 billion+ authentications per month while blocking 3 billion+ attacks, at 99.99% uptime. Recent product work centers on securing AI agents and RAG systems.
Security, compliance, trust, identity, privacy, and risk management platforms for businesses.
See the full Security & Compliance guide to compare more tools, buyer criteria, and related workflows.
Use cases to evaluate
Adding social login, MFA, and passwordless to a new SaaS in under a day
B2B multi-tenant orgs with SAML, OIDC, and SCIM for enterprise customers
Securing AI agent tool calls and RAG retrieval with Fine-Grained Authorization
Token Vault for storing and refreshing third-party API credentials per user
Fit to evaluate
Startup developers shipping a B2C app and staying free under 25,000 MAUs
B2B SaaS founders selling into enterprise that demand SSO and SCIM provisioning
Engineering teams adopting AI agents that need delegated, auditable authorization
Product teams that want a hosted Universal Login instead of building auth from scratch
Business fit
Right for you if you are a developer or product team that wants to add login to a B2C or B2B SaaS in days, not months, with strong free-tier headroom for early stages. The B2B add-ons (orgs, SSO, SCIM) are mature and well documented. Skip if your core need is workforce identity for employees, where Okta Workforce or Entra ID is the better fit. Also skip if you handle a very large MAU base where Auth0's per-MAU pricing becomes more expensive than rolling your own with a library like Supabase Auth or Keycloak.
How to evaluate Auth0
Use this category when security reviews, compliance evidence, or access controls are slowing deals or operations.
Confirm the exact workflow
Map Auth0 to one concrete workflow first, such as adding social login, mfa, and passwordless to a new saas in under a day. Avoid buying before the owner, trigger, output, and success metric are clear.
Check category fit
Compare evidence collection, access controls, integrations, and audit workflows.
Compare practical alternatives
Shortlist Auth0 against Vanta, Drata, Secureframe so the decision is based on fit, effort, and workflow ownership rather than brand recognition alone.
Validate cost and rollout effort
Free up to 25,000 MAUs (both B2C and B2B). B2C Essentials from $35/month (500 MAUs) scaling to $1,400 at 20,000 MAUs; B2C Professional from $240/month. B2B Essentials from $150/month (500 MAUs) scaling to $2,100 at 10,000 MAUs; B2B Professional from $800/month. Enterprise is custom. Annual billing gives one free month. Also confirm implementation time, support needs, and whether the technical setup matches your team.
Compare Auth0 with alternatives
Use this quick comparison before booking demos or moving data into a new system.
| Primary workflow | Adding social login, MFA, and passwordless to a new SaaS in under a day, B2B multi-tenant orgs with SAML, OIDC, and SCIM for enterprise customers |
|---|---|
| Best-fit team | Startup developers shipping a B2C app and staying free under 25,000 MAUs, B2B SaaS founders selling into enterprise that demand SSO and SCIM provisioning |
| Implementation effort | Technical setup and maintenance profile |
| Pricing check | Free plan + paid plans |
| Closest alternatives | VantaDrataSecureframeSprinto |
Auth0 pricing
| Model | Free plan + paid plans |
|---|---|
| Snapshot | Free up to 25,000 MAUs (both B2C and B2B). B2C Essentials from $35/month (500 MAUs) scaling to $1,400 at 20,000 MAUs; B2C Professional from $240/month. B2B Essentials from $150/month (500 MAUs) scaling to $2,100 at 10,000 MAUs; B2B Professional from $800/month. Enterprise is custom. Annual billing gives one free month. |
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Common questions about Auth0
What is Auth0?
Auth0, now part of Okta, is a developer-first authentication and authorization platform that handles Universal Login, SSO, MFA, passwordless, M2M auth, fine-grained authorization, and Token Vault for agent credential delegation. It ships 30+ SDKs and runs 10 billion+ authentications per month while blocking 3 billion+ attacks, at 99.99% uptime. Recent product work centers on securing AI agents and RAG systems.
What is Auth0 used for?
Common use cases: Adding social login, MFA, and passwordless to a new SaaS in under a day; B2B multi-tenant orgs with SAML, OIDC, and SCIM for enterprise customers; Securing AI agent tool calls and RAG retrieval with Fine-Grained Authorization; Token Vault for storing and refreshing third-party API credentials per user.
How much does Auth0 cost?
Free up to 25,000 MAUs (both B2C and B2B). B2C Essentials from $35/month (500 MAUs) scaling to $1,400 at 20,000 MAUs; B2C Professional from $240/month. B2B Essentials from $150/month (500 MAUs) scaling to $2,100 at 10,000 MAUs; B2B Professional from $800/month. Enterprise is custom. Annual billing gives one free month.
Who is Auth0 best for?
Auth0 fits Startup developers shipping a B2C app and staying free under 25,000 MAUs, B2B SaaS founders selling into enterprise that demand SSO and SCIM provisioning, Engineering teams adopting AI agents that need delegated, auditable authorization, Product teams that want a hosted Universal Login instead of building auth from scratch. Right for you if you are a developer or product team that wants to add login to a B2C or B2B SaaS in days, not months, with strong free-tier headroom for early stages. The B2B add-ons (orgs, SSO, SCIM) are mature and well documented. Skip if your core need is workforce identity for employees, where Okta Workforce or Entra ID is the better fit. Also skip if you handle a very large MAU base where Auth0's per-MAU pricing becomes more expensive than rolling your own with a library like Supabase Auth or Keycloak.
What are alternatives to Auth0?
Common alternatives to Auth0 include Vanta, Drata, Secureframe, Sprinto, Thoropass, OneTrust.