Grafana is widely recognized as the leading open-source visualization and observability tool. However, its licensing has evolved significantly. To use Grafana legally and effectively—whether you are a solo developer, a large enterprise, or a cloud provider—you must understand the distinction between Grafana OSS (Open Source Software), Grafana Enterprise , and the licensing change that occurred in 2021. 1. The Core: Grafana OSS (Currently AGPLv3) Until 2021, Grafana was licensed under the permissive Apache 2.0 License . This allowed anyone to use, modify, and even sell the software without sharing their modifications.