Are you a member of the press? Visit our Press Information page.

The Boston office will be closed from December 25, 2023 to January 1, 2024.

Telephone: +1-617-542-5942 (Individual phone extensions at the FSF)

Fax: +1-617-542-2652

General email: info@fsf.org

• Contact us by email.
• In Boston? Come visit us! But, before your visit, please read more about our current Boston office visiting policy.
• How to get to the FSF office using public transportation.

To donate by check: mail to the address above. The FSF can accept Canadian checks; please ask your bank to add a corresponding US bank on the check so that we don't get charged fees for depositing it. If you plan to donate in any other currency, please contact info@fsf.org for details on how to make a transfer from a foreign bank account. If it is a directed donation (e.g. for a sponsored project like Replicant), please write that on the memo line of the check. See more ways to donate to the FSF here.