FusionAuth is the authentication and authorization platform engineered for developers who demand flexibility and control. Built from the ground up to integrate with any stack, every feature — from user registration to MFA and SSO — is exposed via a modern, well-documented API.
Support for every major identity protocol is included out of the box: OIDC, SAML, OAuth2, JWT, passwordless login, social sign-on, and more. Whether you’re building a greenfield app or retrofitting auth into a legacy system, FusionAuth adapts to your use case — not the other way around.
Need compliance? FusionAuth helps you meet GDPR, HIPAA, and COPPA standards quickly and reliably.
Deploy it your way: install on Linux, Windows, macOS, Docker, or Kubernetes — or go with FusionAuth Cloud, our managed SaaS hosting. No black boxes. No vendor lock-in. Just powerful, customizable auth that works the way you do.
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Auth0 takes a modern approach to Identity and enables organizations to provide secure access to any application, for any user. Auth0 is highly customizable, and simple yet flexible. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation.
With Auth0, you can rapidly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control.
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Logto
Logto is a modern Auth0 replacement designed for SaaS and apps. It is a great choice for growing companies and individuals.
Comprehensive Identity Solution
Logto SDKs enable easy authentication.
Supports multiple sign-in methods, including social and passwordless.
Customize UI components to match brand.
The infrastructure is ready-to-use, so there's no need to do any extra setup.
Provides a ready-to-use management API
It offers flexible connectors to customize and scale, and is customized for SAML, OAuth and OIDC protocols.
Enterprise-ready, with role-based Access Control (RBAC), Organizations (multi-tenant applications), User Management, Audit Logs, Single Sign-On (SSO), Multi-factor Authentication (MFA), and Single Sign-On (SSO).
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Skillmine Auth
Skillmine Auth is a complete Identity and Access Management (IAM) platform designed to help organizations manage user identities, control access, and handle authentication securely across all their business applications. It supports modern authentication standards such as SAML, OAuth 2.0, and OpenID Connect, while also offering custom authentication options for older or legacy systems. With flexible deployment choices—whether on Cloud or On-Premises—Skillmine Auth integrates smoothly with Active Directory, HRMS, and other enterprise tools. This allows businesses to create a unified, secure, and consistent user experience across their entire digital environment.
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