# Commercial licensing
SlintPlot is free under either of two licenses (see [LICENSE.md](LICENSE.md)):
- the **GNU GPL, version 3**: free for anyone, for any purpose, including
companies. Software that includes SlintPlot and is distributed to others
must be distributed under the GPLv3, with its source code. Using SlintPlot
only within your own organization, without distributing it, has no such
condition.
- the **PolyForm Noncommercial License 1.0.0**: free for any noncommercial
purpose, with or without sharing your source code: personal projects,
hobby projects and learning; research, experiments and testing; education,
and use by charitable, public research, public safety, health and
government organizations, as listed in the license
## When you need a commercial license
You need a commercial license when you use SlintPlot for a commercial
purpose and don't distribute your software under the GPLv3, for example:
- in a closed-source product, app or device you sell, license or ship to
customers
- in a closed-source app that is free to download but earns money, such as
through paid upgrades, subscriptions or ads
- in closed-source software you deliver to a client
## How to get one
Commercial licenses are available from the copyright holder. To ask for one,
email <license@slintplot.dev> and say briefly how you plan to use the
library.
## Slint's own license
SlintPlot is built on [Slint](https://slint.dev), which has its own
licensing (GPLv3, a royalty-free license for desktop and web apps, or a paid
license). Your application needs a suitable Slint license in addition to a
SlintPlot license.
