Tapad - Tapad is a cross-device tracking, analytics and marketing platform.
Klevu - Klevu offers instant site search solution for eCommerce stores.
TellApart - TellApart helps companies turn individual customer preferences into sales by predicting which items customers are most interested in
Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.
Drawbridge - Drawbridge is a cross-device technology solution that enables brands to have conversations with consumers.
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.