However, I would disagree that WordPress.com is Software as a Service. I would call it Platform as a Service and use NetSuite.com as a great example of SaaS. That’s because the purpose of WordPress.com isn’t to provide you with software that you use. Rather, the WordPress.com software interface exists so that you have a platform for your website. It is not the WordPress software but rather the underlying WordPress core and the PHP engine, which allow your website to function, that make you go to WordPress.com and start a blog.
But I’m highlighting this anyway because I think it’s a good poster and it was a good context for me to give my own little explanation as to the differences. And the poster is spot on regarding PaaS and IaaS.
You can see the post here: