Google Identity offers authentication, SSO, and user‑management for G Suite and other apps. Below is a curated list of 20 alternative IAM/SSO platforms that provide comparable (or richer) password‑less login, multi‑factor authentication, lifecycle management, and API security capabilities.
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Enterprise‑grade identity platform with SSO, lifecycle management, adaptive MFA, and API access management.
Developer‑focused identity as a service offering universal login, MFA, password‑less, and extensive extensibility via rules and hooks.
Microsoft’s cloud directory service delivering SSO, conditional access, MFA, and deep integration with Office 365 and Azure services.
Unified access platform with SSO, adaptive MFA, lifecycle automation, and a robust app catalog for quick integrations.
Directory‑as‑a‑Service that combines user management, device management, SSO, and MFA across Windows, macOS, and Linux.
Identity cloud offering SSO, intelligent MFA, API security, and identity governance for large enterprises.
IBM’s IAM suite delivering SSO, adaptive MFA, identity governance, and risk‑based access controls.
Secure access platform combining SSO, risk‑based MFA, and identity analytics for regulated industries.
Zero‑trust MFA and device trust solution that adds strong authentication to any SSO or VPN workflow.
Identity provider focused on adaptive authentication, password‑less login, and granular risk‑based policies.
Unified IAM platform offering SSO, MFA, and privileged access management with a strong focus on security hygiene.
Comprehensive open‑source‑based IAM suite covering access management, identity governance, and directory services.
Open‑source identity and access management solution providing SSO, social login, LDAP/AD integration, and MFA.
Developer‑centric IAM server with SSO, password‑less, MFA, and extensive API‑first customization.
Privileged access management combined with SSO and MFA for high‑risk accounts and workloads.
SaaS SSO and MFA platform supporting SAML, OIDC, LDAP, and social login with extensive pre‑built connectors.
Customer identity and access management (CIAM) solution offering SSO, password‑less, and social login for consumer‑facing apps.
Open‑source, cloud‑native IAM service delivering SSO, MFA, and password‑less flows with a focus on privacy.
Enterprise‑grade open‑source IAM platform supporting SSO, federation, adaptive authentication, and API security.
Modern .NET Core implementation of OpenID Connect and OAuth 2.0, ideal for developers building custom IAM solutions.