I developed SAML/SSO integration for an application used by the Swiss UBS which initially relied on individual accounts, not even AD. Tricky stuff.
It’s an API for easily adding SAML, SCIM, and more. Currently being used in production by Vercel, Planetscale, Webflow, and +200 other apps.
E.g I know nothing about Azure AD but I just emailed the WorkOS setup link to our customer’s IT team, they followed the instructions and it just worked. No back and forth.
Can’t recommend enough.