FusionAuth is a developer‑friendly identity and access management platform that provides authentication, authorization, and user management out‑of‑the‑box. If you are looking for other SSO solutions that can replace or complement FusionAuth, the list below highlights twenty popular alternatives, each with a short overview and a link to its official site.
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Enterprise‑grade identity platform offering SSO, MFA, lifecycle management, and extensive app integrations.
Developer‑centric identity as a service (IDaaS) with customizable authentication flows, social logins, and robust APIs.
Cloud‑based IAM solution delivering SSO, adaptive MFA, and unified directory services for enterprises.
Microsoft’s consumer‑identity service that provides scalable SSO, social logins, and custom policies.
Amazon’s user‑pool service offering SSO, federation with social/enterprise IdPs, and fine‑grained access control.
Open‑source identity and access management server with SSO, LDAP/AD integration, and social login support.
Comprehensive IAM suite delivering SSO, adaptive authentication, and API security for large organizations.
Directory‑as‑a‑Service platform that provides SSO, device management, and LDAP/AD bridging.
Google’s identity service offering SSO, device management, and integration with G Suite/Workspace.
Enterprise IAM solution with SSO, risk‑based authentication, and lifecycle management.
Identity provider focused on adaptive authentication, SSO, and password‑less login experiences.
Open‑source IAM platform delivering SSO, OAuth2/OpenID Connect, and fine‑grained access control.
Mature open‑source SSO solution based on SAML, widely used in academic and research institutions.
Full‑stack IAM suite offering SSO, identity governance, and API security for complex environments.
Privileged access management and SSO solution focused on zero‑trust security for cloud and on‑premises apps.
Customer identity platform providing SSO, social login, and AI‑driven fraud detection.
Open‑source .NET Core framework for implementing OpenID Connect and OAuth2 SSO services.
Cloud‑based SSO and user provisioning service (now part of Google Cloud Identity) for SaaS applications.
Microsoft’s rebranded Azure AD offering SSO, conditional access, and identity governance across Microsoft and third‑party apps.