The basic plan is free, but is extremely limited. Their personal plan starts with $4 per month billed annually and includes a custom domain. Premium plan costs $8.25 per month billed annually and it gives you the ability to monetize your site and advanced design customization. Business plan costs $24.92 per month billed annually, and it gives you the ability to have Ecommerce and custom plugins.
This is a massive plus of website builders compared to web developers. A web developer can cost between $300 and $1,000 for template customization alone, and a fully customized website built from scratch will often amount to thousands. Making your own website using a builder, meanwhile, allows you to get a fully functioning website up and running for less than the price of a coffee.