Give 3 CMS specifying the best among them with a small definition of each?

1- SharePoint: A collection of cloud and web-based technologies that makes it easy to store, share and manage digital information within an organization.

2- Wordpress:  Another free and open source WCMS based on PHP and My SQL WordPress can be utilized as part of an internet. 

3- Pulse CMS: A proprietary software option designed for small websites that enables a web developer to add content to an existing site and manage it easily and quickly. It does not require a database. It uses Apache with PHP 5 and offers user support for paying customers.