Neo4j is a graph database management system that has gained a lot of popularity in recent years. It is an open-source software, meaning that it is freely available for anyone to use and modify. However, there are important considerations when using Neo4j, particularly when it comes to licensing and legal agreements.

The Neo4j license agreement is a legal document that outlines the terms and conditions under which the software can be used. It is important to read this agreement carefully before using Neo4j, as it governs your rights and responsibilities with respect to the software.

Neo4j is licensed under the AGPLv3 (GNU Affero General Public License version 3) license. This is a copyleft license that requires anyone who modifies or distributes Neo4j to make their modifications and/or source code available under the same license. This means that if you develop an application that uses Neo4j, you must make your source code available under the same license.

The AGPLv3 license also requires that anyone who uses Neo4j over a network (such as a web application) must provide access to the source code of their application to anyone who requests it. This is known as the “network copyleft” clause, and it is intended to ensure that modifications to the code are made available to the wider community.

In addition to the AGPLv3 license, Neo4j also offers a commercial license for those who wish to use the software in a closed-source, proprietary application. The commercial license allows you to use Neo4j without having to release your source code, but it does require payment of a license fee.

It is important to note that the commercial license does not provide any additional features or functionality beyond what is available in the open-source version of Neo4j. It is simply a licensing agreement that allows you to use the software in a closed-source environment.

In conclusion, the Neo4j license agreement is an important document that outlines the terms and conditions under which the software can be used. It is important to read this agreement carefully, particularly if you plan to use Neo4j in a commercial application. The AGPLv3 license is a copyleft license that requires modifications and source code to be made available to the wider community, but a commercial license is available for those who wish to use the software in a closed-source environment.