Elasticsearch is the more common of the two in our index: it runs on 167 websites against 105 for Queryly. Counts come from real scans, not vendor claims.
Elasticsearch is a search engine based on the Lucene library. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents.
Queryly is a cloud-based API providing site search and content recommendation functionalities, utilizing advanced algorithms to deliver quick, relevant search results and personalized content suggestions.
Want to know which one a particular site uses? Look it up and see its whole stack, or compare two sites side by side.