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OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.
Graph database optimized for fast analysis and real-time data processing. It is provided as an extension to PostgreSQL.
AgensGraph, a high performance transactional graph database based on PostgreSQL
Nornicdb is a distributed low-latency, Graph+Vector, Temporal MVCC with all sub-ms HNSW search, graph traversal, and writes. Using Neo4j Bolt/Cypher and qdrant's gRPC means you can switch with no changes while adding intelligent features like schemas, managed embeddings, reranking+llm, GPU accel, Auto-TLP, Policy-based Memory Decay, and MCP server.
One database for user-user (follows), user-item (likes), and item-item (related items) interactions — precomputed at write time, served as simple lookups
JavaScript tools for graph processing in Node.js and the browser inspired by the Apache TinkerPop API
VivaceGraph. Open source Common Lisp graph database & Prolog implementation.
Ductile DB is a graph database based on Hadoop/HBase which provides a vast set of features.