210 Ridge McIntire Road
Suite 500
Charlottesville, VA 22903-5083
Email: contact@cos.io
Unless otherwise noted, this site is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License.
Responsible stewards of your support
COS has earned top recognition from Charity Navigator and Candid (formerly GuideStar) for our financial transparency and accountability to our mission. COS and the OSF were also awarded SOC2 accreditation in 2023 after an independent assessment of our security and procedures by the American Institute of CPAs (AICPA).
We invite all of our sponsors, partners, and members of the community to learn more about how our organization operates, our impact, our financial performance, and our nonprofit status.
