1. 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.

  2. Google Custom Search is a platform provided by Google that allows web developers to feature specialized information in web searches, refine and categorize queries and create customized search engines, based on Google Search.

  3. SearchTap is a search technology that can easily integrate with websites and mobile apps to provide an Amazon-like search experience without writing any code. It solves search problems for websites, businesses, mobile apps and enterprise software.

    paid Free Trial $59.0 / Monthly (Upto 1k Products & 10k Searches)

  4. Elasticsearch is an open source, distributed, RESTful search engine.

  5. Swiftype Site Search helps to sell more, get the right answer to more people on the platform and surface relevant content for readers and followers.

  6. Heritrix is the Internet Archive's open-source, extensible, web-scale, archival-quality web...

  7. Turn the web into a database!

  8. Apache Nutch is a highly extensible and scalable open source web crawler software project.

  9. Apisearch official website.

  10. StormCrawler is an open source SDK for building distributed web crawlers with Apache Storm.

  11. Adds super fast search autocomplete, spell correct and search listing pages to your site search.

  12. ACHE is a web crawler for domain-specific search.