1. PIPL professional search is used to find the person behind an email,phone or social profile and covers over 3 Billion people worldwide.

  2. Sphinx is an open source full text search server, designed with performance, relevance (search quality), and integration simplicity in mind. Sphinx lets you either batch index and search data stored in files, an SQL database, NoSQL storage.

  3. Zettata search is an enterprise-grade search software that significantly enhances the effectiveness of e-commerce sites.

  4. Tiny, invisible and simple, yet powerful and incredibly fast vanilla JavaScript that adds search...

  5. Allow your AngularJS, BackboneJS, or EmberJS apps to be crawled perfectly by search engines. View on Github.

  6. Pixolution is an AI powered visual search engine, with custom training for specific image collections.

  7. Advanced search, market analytics trends, lists, and more

  8. Lookeen is an enterprise search and desktop search software designed for individuals and enterprises. Its key function is Outlook search.

  9. AppWise is an intelligent workspace that unifies enterprise apps into a single, searchable view.

  10. Sajari is a machine learning powered search and matching service.

  11. Quixey invented functional search specifically for apps.

  12. Help you organize/sort your online content by tagging your files in cloud drive and mailbox (Gmail).