Responsive design is a popular web design strategy used by some of these site builders. This approach reformats the same webpage content to fit different screens. But in terms of SEO (search engine optimization), the search engines only care about whether a site displays suitably on mobile screen sizes. Both Bing and Google have pages where you can enter your URL to see if your site plays on mobile acceptably.
Amongst most of the website builders, another name that comes to mind is Squarespace. The versatile builder for blogs, portfolio sites as well as online stores, has managed to rise in its popularity in the recent years. Despite the huge difference, this being a closed source software while WordPress is an open source; it certainly is a great alternative to WordPress Page builder. That’s right, for the casual users the overall functionality and the flexibility is the main aspect.