SSO vs. Social Login: What’s the Difference? [Infographic]

Single sign-on and social login both reduce the friction of typing yet another password, and they are often confused. They are not the same thing. They solve different problems, they live in different parts of your stack, and the right deployment usually involves both.

Social login

Social login lets a user sign in to your product using an account they already have with Google, Apple, Facebook, GitHub, or similar. The identity provider verifies the user, then hands your app a token confirming who they are.

The wins are obvious: no password to remember, no new account to create, a sign-up flow that can complete in two clicks. The trade-offs are less obvious:

• You inherit the security posture of the upstream provider.
• You depend on the provider's continued availability and willingness to serve your use case.
• You get only the profile fields the user agrees to share.
• If the user loses access to their Google account, they lose access to yours.

Social login is a great option for consumer products where reducing sign-up friction directly drives activation.

Single sign-on

Single sign-on lets a user authenticate once and then access multiple applications without signing in again. The user authenticates against a central identity provider, which issues tokens the downstream apps trust.

SSO is the workhorse of corporate IT and increasingly of multi-property consumer brands. One identity, many doors. The benefits:

• One credential to remember, one MFA prompt to handle.
• Centralised access control: revoke once, revoke everywhere.
• Centralised audit logging.
• Better security: users are far more likely to use a strong password and MFA when they only have to set it up once.

The key differences

• Scope. Social login is a single sign-in event against an external provider. SSO is an ongoing session that spans many apps.
• Who runs the IdP. Social login uses Google, Apple, Meta, GitHub. SSO usually uses an IdP your organisation controls, such as Okta, Entra ID, Auth0, or your own CIAM platform.
• Audience. Social login is consumer-first. SSO is enterprise-first, though consumer SSO is increasingly common for multi-brand portfolios.
• Protocol. Social login almost always uses OAuth 2.0 plus OpenID Connect. SSO uses OIDC or SAML, sometimes both.
• Trust model. Social login extends trust to an external provider. SSO concentrates trust in one provider you operate.

When to use which

• Use social login when the goal is to remove sign-up friction for a consumer audience and the user-provided identity is sufficient for your fraud model.
• Use SSO when you operate multiple applications and want one identity to span them, or when you sell to enterprises that expect to integrate with their corporate IdP.
• Use both when you run a consumer product across multiple brands. Social login at the front door, SSO behind the scenes.

The security angle

Both reduce password reuse, which is the single largest source of account takeover. But they only help if you also enforce MFA on the upstream identity. A social login backed by a Gmail account with no 2FA is one phish away from compromise. An SSO backed by an admin account with no MFA is a one-stop breach.

Choose the right pattern for the use case, push strong authentication to the identity provider, and you give users a smoother experience and a safer account at the same time.