Keycloak is an open‑source Identity and Access Management solution offering SSO, LDAP integration, and fine‑grained authorization. Below are 20 comparable SSO platforms you can consider as alternatives.
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Cloud‑native identity platform with universal login, multifactor authentication, and extensive SDKs for rapid integration.
Enterprise‑grade identity service delivering SSO, lifecycle management, and adaptive MFA across thousands of apps.
Microsoft’s cloud directory offering SSO, conditional access, and seamless integration with Office 365 and Azure services.
Secure SSO and identity governance platform with smart factor authentication and a unified access portal.
Scalable SSO and access security suite featuring PingOne, PingFederate, and adaptive authentication.
Developer‑focused identity solution offering SSO, passwordless login, and extensive API‑first customization.
Open‑source IAM platform supporting SAML, OpenID Connect, and LDAP with strong federation capabilities.
Comprehensive open‑source identity server delivering SSO, API security, and identity federation.
Mature open‑source SAML identity provider used widely in academia and research institutions.
Cloud directory offering SSO, device management, and LDAP/AD bridges for hybrid environments.
Enterprise IAM suite delivering SSO, risk‑based authentication, and fine‑grained access policies.
Privileged access management platform with SSO, MFA, and zero‑trust security controls.
Integrated SSO and adaptive authentication solution focused on high‑security enterprises.
Identity provider offering SSO, risk‑based MFA, and AI‑driven threat detection.
Versatile SSO platform supporting SAML, OIDC, LDAP, and social logins with extensive pre‑built connectors.
Open‑source OAuth2 & OpenID Connect server designed for high‑performance, cloud‑native environments.
Open‑source Central Authentication Service providing SSO, multifactor authentication, and protocol support.
Modern .NET Core implementation of OpenID Connect and OAuth2, suitable for custom SSO solutions.
Comprehensive IAM suite delivering SSO, identity governance, and AI‑powered risk analytics.
Unified identity service integrating SSO, device management, and endpoint security across Google Workspace.