Algolia's Search API makes it possible to deliver a search experience in your apps & websites.
http://algolia.com
Widgets · Site Search
Get access to data on 126,901 websites that are Algolia Customers. We know of 29,515 live websites using Algolia and an additional 97,386 sites that used Algolia historically and 17,899 websites in the United States.
Get a list of 126,901 websites using Algolia which includes location information, hosting data, contact details, 29,515 currently live websites and an additional 80,737 domains that redirect to sites in this list. 97,386 sites that used this technology previously and 17,899 websites in the United States currently using Algolia.