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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The OptimalCloud
The OptimalCloud from Optimal IdM provides a scalable and affordable Identity and Access Management Solution that meets the security and usability requirements of small, medium-sized and large enterprises.
The OptimalCloud platform is available for both consumer and workforce deployments. Each pricing tier includes multi-factor authentication (MFA), because good security shouldn't be more expensive. The OptimalCloud integrates with over 11 thousand applications, making it easier to set up and configure. It also offers 24 x 7 x 365 support with a 99.99% uptime guarantee.
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Kinde
Authentication is a pivotal moment in your customer's journey. With Kinde, you can take full control. We provide passwordless authentication, social logins, and enterprise SSO to give your users flexible, secure access. You can fully customize the UI with your own designs and domains, ensuring a seamless, on-brand experience. For complex needs, our powerful workflows let you run custom code during authentication. Plus, you can easily organize business customers using our organizations feature, allowing you to fine-tune the experience for each one.
Beyond authentication, Kinde helps you monetize your business quickly. You can effortlessly create subscription plans and collect revenue. Our platform is built to support B2C, B2B, and B2B2C business models, with robust organization management and flexible billing logic that scales as you grow.
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