Google Customer Reviews
3,200 websites

Google Customer Reviews is free to use

http://www.google.com/trustedstores

The Google Trusted Stores program helps you identify online stores that deliver a good experience. When you buy from a Google Trusted Store you can choose free purchase protection from Google.

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Shopper Approved
9,059 websites

Shopper Approved offers both free and paid options

https://www.shopperapproved.com/

Shopper Approved is a customer rating and review service.

Market Share by Top Websites

1 Shopper Approved is leading in Top 1M Sites and The Entire Web.

2 Google Customer Reviews is leading in Top 10K Sites and Top 100K Sites.

Websites Categories

1 Shopper Approved has better usage coverage in more websites categories. Including Law & Government, Computers Electronics & Technology, Home & Garden, Business & Consumer Services and 18 other categories.

2 Google Customer Reviews is leading in Lifestyle and E-commerce & Shopping.

Geography

1 Shopper Approved is leading in most countries, including United States, Canada, India, Philippines and 87 other countries.

2 Google Customer Reviews is leading in United Kingdom, Germany, Australia, France and 21 other countries.