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 284,523 websites that are Algolia Customers. We know of 206,775 live websites using Algolia and an additional 77,748 sites that used Algolia historically and 112,960 websites in the United States.
Get a list of 284,523 websites using Algolia which includes location information, hosting data, contact details, 206,775 currently live websites and an additional 402,707 domains that redirect to sites in this list. 77,748 sites that used this technology previously and 112,960 websites in the United States currently using Algolia.