Duda is a website builder that power a lot of hosting companies with their whitelabel offering. 1&1, 123 Reg, Register.it are among the many hhosting providers that also resell the Duda Website Builder under their own brand.
They also have a "retail" option that feels a bit pricey, at $14.25 per month.
Among their best features are a very well done form builder, lots of styling settings for the templates and especially their "personalization rules". That means that you can customize the content on the page according to certain rules like what time it is or where the visitors arrived from.
The Enterprise plan allows you to export the full website in a zip archive.
Notably there is no live chat or phone support number available.