You can generate reports based on the TLD (top-level domain) that is , the extension such as .com or .uk as shown in the demo.
The keyword tab on reports allow you to filter a report by keywords found on the homepage of the websites in your report. This allows you to breakdown a report by specific keywords. The video below shows this function in action. You can also create lists based on keywords as a starting point.
BuiltWith Exclusion List Management lets you keep track of your Lead effort by allowing you to visually see what results in BuiltWith are in your existing account or lead lists. This demo shows how you can use BuiltWith Exclusion Lists.