I developed SAML/SSO integration for an application used by the Swiss UBS which initially relied on individual accounts, not even AD. Tricky stuff.

Small plug for http://WorkOS.com (where I work).

It’s an API for easily adding SAML, SCIM, and more. Currently being used in production by Vercel, Planetscale, Webflow, and +200 other apps.

I can vouch for this - I’ve just rolled out workos with three enterprise customers in the last 6 months. Super simple, great docs. Had been putting off SSO for years hoping something would come along and solve it for me.

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.

I did SAML with Barclays years ago. The hardest part was getting someone there to click enable for our app. They’d never reply to my emails so I called them until they picked up. Then it was done in 30 minutes.