As a consultant, I have integrated Okta in a number of organizations over the past couple of years. We have connected tens of thousands of users to hundreds of applications including the big ones like Salesforce, Zendesk, Jive, IBM Global Expense Reporting.
Okta has streamlined the integration process through the use of their Application Network.; a catalog of thousands of templates already configured to work with common business and personal applications. SSO has been reduced to quick and simple process.
The ease of which you can import users, configure SSO for apps, and manage permissions is phenomenal.
Connecting Okta to Active Directory takes all of 15 minutes! This also allows you to let users change their AD passwords without requiring helpdesk assistance.