Neo4j is a high-performance, NOSQL graph database with all the features of a mature and robust database. The programmer works with an object-oriented, flexible network structure rather than with strict and static tables — yet enjoys all the benefits of a fully transactional, enterprise-strength database. For many applications, Neo4j offers performance improvements on the order of 1000x or more compared to relational DBs.
Neo4j is an open source project available in a GPLv3 Community edition, with Advanced and Enterprise editions available under both the AGPLv3 and commercial licenses, supported by Neo Technology. Learn which license is right for you.