Something not explained in the article is that a big feature of Builder.io is that unlike Framer and other WYSIWYG editors, you can actually export the sites yo

Something not explained in the article is that a big feature of Builder.io is that unlike Framer and other WYSIWYG editors, you can actually export the sites you have built as code. And you can choose what language / framework / CSS style you export the code as. I imagine they convert the Figma design into an intermediate form which is what you work with in their UI, and then when it generates code it is compiled with the options you choose.