Hello! Wanting to know if I have to have Marketing Hub in order to have CSM Hub?
Hey @Jbacon the short answer is no, CMS Hub is a standalone Hub.
Now, if you want to be able to do cool things like send automated emails, you may find yourself quickly outgrowing just CMS Hub. 
@Jbacon another thing you might want to consider when reviewing CMS Hub vs Marketing Hub and which tier you need is that some website themes require access to the CTA tool within HubSpot.
There are two ways to achieve this:
CMS Hub Professional or Enterprise
CMS Hub Starter and Marketing Hub Professional or Enterprise
Regardless of what tier you choose for CMS Hub, you’ll end up with the free version of Marketing Hub and can check out the features and grow into using more features/higher tier later.