Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
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.
Meilisearch - Ultra relevant, instant, and typo-tolerant full-text search API
Typesense - Typo tolerant, delightfully simple, open source search 🔍
Milvus - Vector database built for scalable similarity search Open-source, highly scalable, and blazing fast.