Most “no code” tools fall on two ends of a spectrum: they either make users choose full templates or draw rectangles. Blocks UI is unique because it actually edits the underlying code and works at the level of components.
Rather than selecting a “template” (although that is also possible with Gatsby themes) users are drag-and-dropping components to build a website. Those actions are then translated live into actual code in your files.
Blocks enables non-technical folks (e.g. WordPress users) to code websites visually. That means they can hire developers or use Gatsby’s rich ecosystem of plugins to add custom functionality. Contrary to every other tool, this does not require weird escape hatches–full extensibility and customizability are the default.