The strategies and tactics in the 30 Day List Building Challenge are applicable to all businesses, regardless if your site is on WordPress or not.
We do make recommendations for added functionality throughout the challenge that can only be used on WordPress sites, as other platforms do not allow for the same flexibility.
If you are considering migrating to WordPress, we have a post to help you 🙂
http://nathalielussier.com/blog/blogging/moving-site-to-wordpress-blogger