FusionAuth
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
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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Twilio Verify
Verify offers 100% protection against SMS pumping fraud.
Verify is an API that allows for multichannel verification of users. Fraud Guard provides protection against SMS pumping fraud. Terms and conditions apply.
One turnkey API that provides a multi-channel solution for user verification. Add seamless two-factor verification to your onboarding flow and login flow using a single API. This API does the work of an OTP delivery solution.
Fraud Guard has already prevented over 398,000,000* fraud attempts, saving customers over $46 million. Fraud Guard is the first to market innovation that offers 100% protection from SMS pumping fraud.
Integrate a ready-to-use solution that takes care of all your connectivity needs, channels, code creation, fraud monitoring and more, using native software.
Reduce fraud across all your channels with phone number validation that uses a single API endpoint to validate users, detect fraud and reduce friction.
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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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