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 118 other categories.
GroupM Server is leading in People & Society, Movies, Games, TV & Video and 15 other categories.
ReachLocal is leading in most countries, including United States, Australia, Canada, India and 48 other countries.
GroupM Server is leading in Poland, Germany, Denmark, Austria and 15 other countries.