ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...
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.
ItemsAPI - ItemsAPI is open source search API for creating mobile and web application
Elasticlunr - Lightweight full-text search engine in Javascript for browser search and offline search.
pgvecto.rs - Scalable, Low-latency and Hybrid-enabled Vector Search in Postgres. Revolutionize Vector Search, not Database. - tensorchord/pgvecto.rs