The Correspondent - An inclusive and ad-free movement for unbreaking news
Klevu - Klevu offers instant site search solution for eCommerce stores.
Skim.It - Save, sort and share the good stuff you find online.
Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.
Skimcast - Takes in any document and skims it down for your convenience
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.