WordPress is a good choice for startups because it has a large community for support, is a full content management system beyond just blogging, and is highly extensible through plugins. BuddyPress is a social plugin for WordPress that adds features like friending, messaging, profiles and more. While originally designed for social networks, BuddyPress allows activating only the needed features. These tools provide startups with resources, stability, security, flexibility and quick deployment which are important needs for new companies.