We strive for transparency in our operations and finances to be accountable to our stakeholders and the public. A full description of this rationale is in our Partnership Framework.
We ask for your help in honoring this commitment to transparency. If you decide to donate to COS we request that you also allow us to publicly recognize you for your generosity. We will list you as a donor on our website and in our annual reporting documents but will not list your donation amount. If you prefer to remain anonymous, we encourage you to take advantage of another way of donating. You can give anonymously to COS via PayPal Giving Fund, Network for Good, or major donor-advised funds. This way, you will remain anonymous to both COS and the public, and your donation will still have the full impact you intend.
Please contact the COS Development Team with any questions at giving@cos.io or at (434) 207-2133.
Make a one-time or recurring donation online via credit or debit card or eCheck.
Make a donation through the PayPal Giving Fund.
Make a donation by completing this form and returning it with the instructions provided.
Please email giving@cos.io for instructions on how to make a gift via wire transfer, or contact us at (434) 207-2133.
Determine Employer Gift Matching Eligibility. Increase the impact of your gift to support open science by including an employer matching gift.
Make a gift of stock, mutual funds, other securities, or a planned gift to COS. To discuss including COS as a beneficiary in your will or retirement plan, please contact us via email or at (434) 207-2133.
Support a specific preprint or paper sharing service.

6218 Georgia Avenue NW, Suite #1, Unit 3189
Washington, DC 20011
Email: contact@cos.io

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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.