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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MIRACL
Protect your users. Make their journey easier. MIRACL Trust provides a safer and smoother authentication experience. Only one step. No passwords. No problem. Multi-factor authentication is slow and cumbersome. MIRACL is a safer and more efficient alternative to traditional MFA. Logging in takes only 2 seconds and error rates as low at 1/10th of passwords. No passwords necessary. All you need is a PIN and you are in. Our cryptographic technology ensures that users' information is always safe. MIRACL Trust provides a simple login experience that puts users first and makes it easy to roll out your data quickly.
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Authsignal
Drop Authsignal into your identity stack to secure customer journeys and deliver world-class user authentication experiences. Focused on enabling product and fraud teams to orchestrate customer journeys and mitigate fraud, Authsignal makes it easy to deploy passkeys.
Delivering class-leading drop-in authentication experiences, product teams leverage Authsignal to drop authentication (Passkeys, push, SMS authentication) challenges anywhere in the user experience. Seamlessly authenticate identity, secure customer journeys, and protect customer data with a unified customer experience.
Gain a single view of customer activity and stream identity data with audit trails.
Passkeys, CIAM, IAM, Authentication, Passwordless Authentication,
Multifactor Authentication, Passkey
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