GroupM Server is leading in Top 10K Sites and Top 100K Sites.
ReachLocal has better usage coverage in more websites categories. Including Business & Industry, Construction & Maintenance, Health, Autos & Vehicles and 130 other categories.
GroupM Server is leading in Cooking & Recipes, Movies, Games, Web Hosting and 14 other categories.
ReachLocal is leading in most countries, including United States, Australia, Canada, United Kingdom and 54 other countries.
GroupM Server is leading in Germany, Poland, Denmark, Spain and 21 other countries.