Thrive Theme Builder is a full theme-builder tool from Thrive Themes that allows you to visually design every part of your WordPress site without coding. You can customize headers, footers, blog post templates, sidebars, search pages, 404 pages, category pages, and more. 

Premium features include built-in integration with WooCommerce for e-commerce stores, mobile-responsive design, tools focused on conversion like lead generation forms and smart color settings, and compatibility with Thrive’s other tools.