Neo4j
Neo4j, Inc. · NoSQL & key-value stores
Native property-graph database queried with Cypher, offered as a GPL community edition, a commercial enterprise edition and the AuraDB cloud service
GPL-3.0Open sourceFreemiumSelf-hostedBroken
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Qdrant
Qdrant Solutions GmbH · Vector databases
Open-source vector search engine written in Rust with filterable HNSW indexes, sparse and multi-vector support, REST/gRPC APIs and a managed cloud
Apache-2.0Open sourceFreemiumLocalSelf-hostedNov 2, 2026
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