Qdrant is described as '(read: quadrant) is a vector similarity search engine and vector database. It provides a production-ready service with a convenient API to store, search, and manage points—vectors with an additional payload Qdrant is tailored to extended filtering support' and is an app in the development category. There are more than 50 alternatives to Qdrant for a variety of platforms, including Linux, Self-Hosted, Web-based, Mac and SaaS apps. The best Qdrant alternative is Algolia. It's not free, so if you're looking for a free alternative, you could try Algolia or Elasticsearch. Other great apps like Qdrant are OpenSearch, Golem, Apache Solr and Manticore search.