---
title: Java agent licenses
source: https://docs.newrelic.com/docs/licenses/product-or-service-licenses/new-relic-apm/java-agent-licenses
---

We love open-source software, and use the following in the New Relic Java agent. Thank you, open-source community, for making these fine tools! Some of these are listed under multiple software licenses, and in that case we have listed the license we've chosen to use.

| **Library**                                                               | **License**                                                                                               |
| ------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------- |
| [Apache Cassandra](https://cassandra.apache.org/)                         | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Apache Harmony](https://harmony.apache.org/)                             | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [ASM](http://asm.ow2.org/)                                                | [ASM (BSD-3)](http://asm.ow2.org/license.html)                                                            |
| [Caffeine](https://github.com/ben-manes/caffeine)                         | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Checker Qual](https://checkerframework.org/)                             | [The MIT License (MIT)](https://checkerframework.org/manual/#license)                                     |
| [Guava](https://code.google.com/p/guava-libraries/)                       | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [gRPC](https://grpc.io/)                                                  | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Gson](https://github.com/google/gson)                                    | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [HttpClient](http://hc.apache.org/httpcomponents-client-4.3.x/index.html) | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Jackson](https://github.com/codehaus/jackson)                            | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [JRegex](http://jregex.sourceforge.net/)                                  | [BSD-3](http://opensource.org/licenses/BSD-3-Clause)                                                      |
| [JSON.simple](https://code.google.com/p/json-simple/)                     | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Log4j2](https://logging.apache.org/log4j/2.x/)                           | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Netty](http://netty.io/)                                                 | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [New Relic Security Agent](https://github.com/newrelic/csec-java-agent)   | [New Relic Pre-Release Software Notice](https://github.com/newrelic/csec-java-agent/blob/main/LICENSE.md) |
| [OkHttp](https://square.github.io/okhttp/)                                | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Okio](https://square.github.io/okio/)                                    | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [OpenTracing](http://opentracing.io/)                                     | [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)                                          |
| [Protobuf](https://github.com/protocolbuffers/protobuf)                   | [The Protocol Buffers License](https://github.com/protocolbuffers/protobuf/blob/v3.11.4/LICENSE)          |
| [SafeYAML](https://github.com/Konloch/SafeYAML)                           | [Apache License 2.0](https://github.com/Konloch/SafeYAML/blob/main/LICENSE)                               |
| [SLF4J](http://www.slf4j.org/)                                            | [The MIT License (MIT)](http://opensource.org/licenses/MIT)                                               |

Remaining code in versions prior to v6.0.0 is licensed under the [New Relic agent license agreement](https://docs.newrelic.com/docs/licenses/license-information/other-licenses/new-relic-agent-license). License terms for v6.0.0 and later can be found on [GitHub](https://github.com/newrelic/newrelic-java-agent/blob/main/LICENSE).