It’s easy to check whether your multisite will work on Pressable.
First, go to My Sites -> Network Admin -> Sites in the top-left menu.
Here, you will see your site and subsites.
However, if your sites all begin differently and end with your domain, you have a subdomain install.
This configuration is not currently supported by Pressable.
If you want Pressable to help migrate your multisite, please be sure to let us know!