Klevu - Klevu offers instant site search solution for eCommerce stores.
Arqspin - 360 photo software from Arqspin makes creating professional 360 product photography with your DSLR camera or smartphone simple.
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.
Hawk Search - Site-search engine for eCommerce platforms.
Tagalys - Data driven online Merchandising for eCommerce product listing pages.
Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.