To an end user, an application deployed on a PaaS cloud feels like using:

1. The end user did not build the application and cannot see the platform. 2. They simply subscribe to finished software. 3. To end users, access to applications on a PaaS cloud is the same as using a SaaS cloud. 4. So the answer is a SaaS cloud. _Source: NIST SP 800-146, 'Cloud Computing Synopsis and Recommendations'_