Neo4j is an open-source, NoSQL, native graph database providing ACID-compliant transactions
Neo4j is the world’s leading Graph Database. It is a highly scalable, native graph database purpose-built to leverage not only data but also its relationships. Neo4j's native graph storage and processing engine deliver constant, real-time performance, helping enterprises build intelligent applications to meet todays evolving data challenges.
It is a high performance graph store with all the features expected of a mature and robust database, like a friendly query language and ACID transactions. The programmer works with a flexible network structure of nodes and relationships rather than static tables — yet enjoys all the benefits of enterprise-quality database. For many applications, Neo4j offers orders of magnitude performance benefits compared to relational DBs. That’s why it’s deployed by hundreds of Fortune 500 companies, government agencies, and NGOs.