About Us

About Us

Stan is freedom-respecting, open-source software (new BSD core, some interfaces GPLv3) for facilitating statistical inference at the frontiers of applied statistics.

The Stan Development Team

The project is a team effort comprised of full time and volunteer developers from around the world.

Stan Logo

The Stan name and logo are registered trademarks of NumFOCUS under the direction of the Stan Governing Body. For details on when you can use the logo see


Stan would not exist or continue to exist without the generous support of grants, foundations, and sponsors.

If you are interested in supporting the development of Stan then please see our support page detailing the ways in which you can contribute.


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.

All financial decisions related to NumFOCUS are made by the Stan Governing Body.

The mission of NumFOCUS is to promote sustainable high-level programming languages, open code development, and reproducible scientific research. We accomplish this mission through our educational programs and events as well as through fiscal sponsorship of open source data science projects. We aim to increase collaboration and communication within the scientific computing community.

quoted from the NumFOCUS home page

Stan Governing Body (SGB)

The Stan Governing Body provides project governance structure in accord with the NumFOCUS requirements and is the liaison between the project and NumFOCUS for all fiscally sponsored initiatives. The SGB has authority over:

  • ownership and management of trademarks
  • online resources including the Stan Discourse, the stan-dev GitHub organization
  • NumFOCUS funds
  • fundraising in support of Stan
  • authorizing and/or running Stan conferences
  • licensing requirements for contributed code and documentation

The SGB is intended to be a transparent body in service of the Stan community and electorate. To this end the SGB will post regular updates about its activities on the Stan forums in the Stan Governance category.

The SGB is to advance diversity in under-represented communities in the Stan ecosystem. The SGB will actively develop and implement strategies to improve inclusion and diversity at all levels of the Stan project and will prepare an annual diversity report.

To reach the current SGB with any questions, concerns, or feedback, please email board@mc-stan.org.

The current SGB members are:

  • Vianey Leos Barajas (University of Toronto)
  • Mitzi Morris (Columbia University)
  • Sean Pinkney (Bully Pulpit Interactive Media)
  • Jose Storopoli (UNINOVE, Brazil and Pumas-AI, Inc.)
  • Yi Zhang (Metrum Research Group)

[SGB public updates]