SSO consolidates authentication. Instead of every app having its own password, all apps trust an identity provider (Okta, Auth0, Microsoft Entra) to vouch for the user. Standards like SAML and OIDC handle the federation.
The "SSO Tax" is a SaaS pricing pattern where vendors lock SSO behind their most expensive enterprise tier — often 5-10x the regular plan. The technical effort to ship SAML is one engineer-week; the pricing reflects gating, not cost. sso.tax tracks vendors that do this.
lrok deliberately doesn't tier SSO. When we add it, it'll be on the same $9/mo Pro plan. We're not chasing the enterprise market that the SSO Tax model targets.