PercentMobile
10 websites

PercentMobile offers both free and paid options

http://percentmobile.com/mobileanalytics

QR Codes, NFC Tags, and Real-world Analytics by Delivr. Delivr is a hosted service that provides QR Code and NFC Tag creation, management, and tracking .

VS

Usablenet
92 websites

Usablenet costs money

http://usablenet.com

Designed to help companies immediately and comprehensively improve web accessibility which includes Mobile.

Market Share by Top Websites

1 Usablenet is leading in Top 100K Sites and Top 1M Sites.

2 In terms of market share, PercentMobile is clearly lagging behind, losing to Usablenet in all segments.

Websites Categories

1 Usablenet has better usage coverage in more websites categories. Including E-commerce & Shopping, Food & Drink, Vehicles, Health and 11 other categories.

2 PercentMobile is leading in Arts & Entertainment.

Geography

1 Usablenet is leading in most countries, including United States, United Kingdom, India, Canada and 6 other countries.

2 PercentMobile is leading in Spain, Argentina and Ecuador.