Contribute to the Stan Project

Stan is now linked to NumFOCUS, a U.S. 501(c)(3) nonprofit organization that serves several other open-source software projects, including NumPy, Julia, Jupyter, and others.

Stan can now accept tax-deductible contributions through this foundation. If you’re interested in contributing to Stan’s ongoing development, you may contact us directly or just follow the link: 

It is also possible to donate to Stan via the GitHub sponsors program:

Why Support Stan?

Stan is a worthy cause: our software is free and, as users can attest, we also give a lot of free and open help through the Stan Forums. By supporting Stan, you or your organization is helping to make this state-of-the-art Bayesian data analysis program even better. You’re pushing forward the frontiers of science and helping your own work as well as others’.

Stan goods for good