Squarespace does have an export, and it produces a WordPress XML file. That is genuinely more than Wix offers. The catch is that it was built for one destination, WordPress, and even going there it carries only a portion of your site.
The strangest part: you cannot import a Squarespace export into another Squarespace site. The file exists to help you leave, not to help you move around inside.
Squarespace's own list of what cannot be exported is longer than the list of what can. It leaves behind:
Open the file and check that the pages you actually care about are inside it. People discover the gaps after cancelling, which is the one moment at which this becomes expensive rather than annoying. It costs ten minutes to look.
Your words and your photographs are yours. The template is not, and neither are the platform's stock images or its fonts. That is true of every builder, including ours. What differs between platforms is whether they tell you plainly before you pay, or leave you to find out at the exit.
We do this for people. We rebuild the site properly, map every redirect before anything switches over, and your old site stays up until you tell us you are happy with the new one. From CA$1,800, quoted after we look at your pages rather than guessed. Tell us about your site.