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 101,617 websites that are Algolia Customers. We know of 24,384 live websites using Algolia and an additional 77,233 sites that used Algolia historically and 14,743 websites in the United States.
Get a list of 101,617 websites using Algolia which includes location information, hosting data, contact details, 99,637 currently live websites which includes 75,253 domains that redirect to sites in the list. 77,233 sites that used this technology previously and 14,743 websites in the United States currently using Algolia.