I know this is old, so I'm not sure if you'll see it, but I'm genuinely curious what alternatives you suggest. My experience has been: start with Google until

I know this is old, so I'm not sure if you'll see it, but I'm genuinely curious what alternatives you suggest. My experience has been: start with Google until it's too painful to continue, choose between Azure AD or Okta. Self-hosting for plenty of firms is just asking for worse scenarios. Is there some market leader I'm unaware of?