nopCommerce is an open source e-commerce solution that contains both a catalog frontend and an administration tool backend.
Yahoo Merchant will help you create, manage and advertise your online store
nopCommerce is leading in Top 100K Sites, Top 1M Sites and The Entire Web.
In terms of market share, Yahoo Small Business is clearly lagging behind, losing to nopCommerce in all segments.
nopCommerce has better usage coverage in more websites categories. Including Computers Electronics & Technology, E-commerce & Shopping, Home & Garden, Lifestyle and 14 other categories.
Yahoo Small Business is leading in Arts & Entertainment, Hobbies & Leisure, Pets & Animals, Games and one other category.
nopCommerce is leading in most countries, including United Kingdom, Italy, Canada, Greece and 110 other countries.
Yahoo Small Business is leading in United States, Indonesia, Puerto Rico, Bahamas and 5 other countries.