Single Sign-On, or SSO, lets an employee log into HR software and other company apps using one existing set of credentials, rather than a separate password just for the HR system.

How it works, and why offboarding is the real payoff

The HR platform delegates login to a central identity provider, typically the company’s Google or Microsoft account, using an authentication protocol, SAML is the more common choice in enterprise HR contexts, OAuth more common for consumer apps and APIs. Once a user authenticates once against that central identity, they move into the HR system without a fresh login prompt. The security benefit that matters most for HR specifically is offboarding: disabling one central account revokes access to the HR system and every other connected app immediately, instead of IT having to manually deactivate each system one by one when someone leaves.

Frequently asked questions

Is SSO the same as SAML?

No. SAML is one of the underlying protocols that can implement SSO, not a synonym for it, OAuth is another.

Does SSO replace multi-factor authentication?

No, they solve different problems and are commonly used together, SSO reduces password sprawl, MFA adds a second verification step at login.

Why does SSO matter more for HR software specifically?

Because HR systems hold sensitive personal and compensation data protected by role-based access control, and immediate offboarding through one central account closes a real security gap.

See how this pairs with role-based access control to control what someone can do once they’re logged in.