The most popular website builder is WordPress. It is by far the most widely used website software, with its content management system being used by a whopping 43.3% of all websites according to W3Techs. That does not mean all of those sites were made on WordPress.com though; they're using the same underlying software on other hosting providers. That's a bit more complicated than simply using one of the website builders being discussed here. By comparison, 4.5% of all websites use Shopify, and 1.9% use Wix, again according to W3Techs. Following WordPress, those are the second and third most widely used content management systems, respectively.