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 121,060 websites that are Algolia Customers. We know of 24,004 live websites using Algolia and an additional 97,056 sites that used Algolia historically and 14,533 websites in the United States.
Get a list of 121,060 websites using Algolia which includes location information, hosting data, contact details, 24,004 currently live websites and an additional 75,391 domains that redirect to sites in this list. 97,056 sites that used this technology previously and 14,533 websites in the United States currently using Algolia.