Hi there, Webflow founder here! We actually have a free trial, which lets you design and export as many sites as you'd like in a 2 week period. If you're still working on your site after your trial is over you have the option of upgrading to the Personal plan which gives you the ability to export your sites. You can cancel at any time and we never delete your work, so you can come back a year later and redesign your site again.