Neo4j is the world’s leading Graph Database. 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.

Learn more on the Neo4j website.

Neo4j is available both as a standalone server, or an embeddable component. You can download or try online.

We encourage experimentation with Neo4j. You can build extensions to Neo4j, develop library or drivers atop the product, or make contributions directly to the product core. You’ll need to sign a Contributor License Agreement in order for us to accept your patches.

Neo4j is built using Apache Maven version 3.3 and a recent version of supported VM. Bash and Make are also required. Note that maven needs more memory than the standard configuration, this can be achieved with export MAVEN_OPTS="-Xmx512m".

OS X users need to have Homebrew installed.

Before you start running the unit and integration tests in the Neo4j Maven project on a Linux-like system, you should ensure your limit on open files is set to a reasonable value. You can test it with ulimit -n. We recommend you have a limit of at least 40K.

• A plain mvn clean install will only build the individual jar files.

• Test execution is, of course, part of the build.

• In case you just want the jars, without running tests, this is for you: mvn clean install -DskipTests.

• To build product packages, do export PATH="bin:$PATH" && make clean all in the packaging directory after building artifacts with Maven.

• To build the documentation see the Neo4j documentation.

• If you are running into problems building on Windows you can try building Neo4j in a Ubuntu virtual machine.

• You may need to increase the memory available to Maven: export MAVEN_OPTS="-Xmx512m".

After running a mvn clean install cd into packaging/standalone/target and extract the version you want, then

in the extracted folder to start Neo4j on localhost:7474. On Windows you want to run

instead.

Or, if you are not interested in the tarballs and just want to run Neo4j you can instead run a mvn clean install -DminimalBuild and then cd into community/server and run

to start Neo4j.

Neo4j Community Edition is an open source product licensed under GPLv3.

Neo4j Enterprise Edition expands the functionality of Community Edition with Enterprise-grade features.

Neo4j Enterprise consists of modules from Neo4j Community Edition and modules licensed under AGPLv3 with the Commons Clause in this repository, and other closed source components not present in this repository.

When packaged as a binary, Enterprise Edition includes additional closed-source components not available in this repository and requires a commercial license from Neo4j Sweden AB or one of its affiliates.