What's the best free website builder you know?

Mobirise

Google Sites is an underrated builder with a level of free other apps don't even come close to. It doesn't have any paid tier and offers free hosting. You can even connect it to a custom domain that you own for free. The actual designs you can create are mind blowing considering it's dedicated to beginners

I really liked Duda for agency work / managing clients pages. Webflow seems to be the goto for high-touch implementations. Bubble is good for creating something more like a web app if you are looking for no code tool

If it really has to be completely free WordPress is hard to beat because there are many awesome free themes and starter kits that allow you to almost build anything. For Static Websites I like Bootstrap Studio which is only $29 to build unlimited sites.

Depends on what kind of website your thinking of. There's a list of mobile sites (some are link-in-bios) coming out since 2021, if that counts.

Joonweb.com is a best website builder, here you can create informative or eCommerce website without knowledge of coding. Start Creating your Website Now

For me, it is a combo WordPress + Elementor

I work with Wordpress on a daily basis but it’s not exactly free. You need to host it and get a domain. The market leaders like Wix and Squarespace (I quite like this) offer free versions but they display adverts on them. I’m about to launch a prototype of a brand new web builder which will be completely free with no adverts. Please check out the landing page here - https://webwizod.com. Let me know your thoughts.

After using Wordpress for almost a dozen years now, it's still one of the best free builders out there because of all the plugins available and massive support for pretty much any issue. You'll still have to pay for hosting and custom url's unless you use Wordpress.com.