Logto is an open-source identity and access management platform that provides authentication, authorization and multi-tenancy for SaaS and AI apps, built on OpenID Connect (OIDC) and OAuth 2.1.
Logto gives developers customizable sign-in experiences, social and enterprise login, and organization management without building identity from scratch. It can be self-hosted from the open-source repository or used as Logto Cloud, and it is often considered an open-source alternative to Auth0.
Key features
- Sign-in with email, phone, passwordless, social providers and passkeys
- Enterprise SSO with SAML and OIDC
- Multi-factor authentication
- Organizations for multi-tenant B2B apps
- Role-based access control and API resource protection
- Machine-to-machine apps and third-party OAuth apps
- SDKs for popular web, mobile and backend frameworks
- Self-hosted open source or managed Logto Cloud
Who it's for
Logto is for developers and SaaS teams that want standards-based auth with the option to self-host, including B2B products that need organizations and enterprise SSO.
Common use cases
- Adding login to a SaaS or AI app
- Building multi-tenant B2B apps with organizations
- Protecting APIs with OAuth access tokens
- Replacing Auth0 with a self-hostable option
Pricing
According to Logto's pricing page:
- Free: $0 per month, up to 50,000 MAU, 3 applications and 1 machine-to-machine app.
- Pro: from $24 per month, with unlimited MAU and applications. It includes 50K tokens, then $0.08 per 100 extra tokens.
- Enterprise: contact sales.
The open-source edition can be self-hosted.
Alternatives
- Clerk: authentication and user management for React and Next.js
- SuperTokens: open-source authentication
- Auth0: Okta's identity platform
FAQ
Is Logto free?
Yes. Logto Cloud's Free plan covers up to 50,000 monthly active users, and the open-source version can be self-hosted.
What is Logto used for?
Logto is used to add authentication, SSO, MFA and authorization to web, mobile and SaaS applications.
Is Logto a good Auth0 alternative?
Yes. Logto offers OIDC-based auth, SSO and organizations with an open-source, self-hostable option and lower pricing.
Logto vs Clerk: what's the difference?
Clerk focuses on prebuilt React components and a hosted service, while Logto is open source and built around OIDC standards.
Does Logto support enterprise SSO?
Yes. Logto supports SAML and OIDC enterprise SSO.
How much does Logto Pro cost?
Logto Pro starts at $24 per month, with usage-based token billing beyond the included 50K.
