[pathy]

What is your core competency? A self-hosted wordpress does take time to maintain, security updates and what not.

If I were to host a company blog (With no particular privacy concerns) I would probably use something like WPEngine.com. The cost per month is relatively small and if your company saves just an hour or two per month on maintenance, it is probably worth it.

Tumblr/wp.com is of course an alternative but it depends if you feel that they provide enough customizability for your needs.

Wordpress.com, for example, does not allow Google Analytics last I checked, and that was a big no no for me.

Edit: You can use Jekyll, octopress and so forth like others have suggested. BUT who are going to be writing/using the blog? Less technical users may not find those easy to use. The upside of both WP and tumblr is that they are easy to use for the average user.