A1 Website Search Engine VS Apisearch

Google Custom Search Engine - 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.

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.

Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...

Site Search 360 - Site Search 360 enhances and improves your built-in CMS or product search with autocompletion, semantic search, filters, facets, detailed analytics, and a whole lot of customization options.

ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.

Zoom Search Engine - Add search to your website, Optical Character Recognition* (OCR) for images and PDF, Huge indexing optimizations Multi-threaded Offline Indexing