Adding pop-up code on Personal plan

Hi! Is it possible to add custom-coded pop-up to a site on Personal plan? Even if we switch to the next plan, Squarespace doesn't have an integration with our current email marketing provider (Campaign Monitor) so we might as well just add the custom code. 

I don't think you will be able to do it for free. It is either buy a plug in,  or move to a business plan.

3 hours ago, derricksrandomviews said:

I don't think you will be able to do it for free. It is either buy a plug in,  or move to a business plan.

Thanks, Derrick! I was under the impression that some customization is available even on the Personal plan. But on the Business plan it won't be an issue?

It will not, the pop up is standard and very configurable for forms, announcements, other call to actions, some folks put an image on it as well. You can set how often it appears, how far down the page a visitor scrolls before it pops up, and which pages you want it on or all of them. It works very well. 

Business plan allows for custom CSS as well which allows you to do a whole lot of customizations.