TerminalFour is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Yellow Pages has better usage coverage in more websites categories. Including Business & Industry, Construction & Maintenance, Health, Shopping and 55 other categories.
TerminalFour is leading in Universities & Colleges and Career & Education.
Yellow Pages is leading in most countries, including Canada, Russia, Bangladesh, India and 5 other countries.
TerminalFour is leading in United States, United Kingdom, Australia, Nigeria and one other country.