Top passwordless login clients include Microsoft Entra ID, Okta, Cisco Duo, Ping Identity, Auth0, HYPR, Beyond Identity, OneLogin, FusionAuth, and 1Password Business. These platforms support FIDO2/WebAuthn, passkeys, biometrics, MFA, and phishing-resistant authentication with SSO and zero-trust capabilities. Microsoft Entra ID and Okta lead in enterprise identity, scalability, and hybrid cloud integration. Duo and Ping Identity focus on secure device trust and adaptive authentication, while HYPR and Beyond Identity specialize in fully passwordless zero-trust security. Auth0, FusionAuth, and 1Password Business are easier for developers, startups, and SMBs due to flexible APIs and simpler deployment. Overall, Entra ID and Okta suit enterprises, Duo and Ping fit security-heavy environments, and Auth0/FusionAuth/1Password are best for smaller or developer-driven teams.