The Zooniverse is a platform for people-powered research, not an entity, company, or non-profit. We are a multi-institutional collaboration.
The Adler Planetarium in Chicago, one of the host institutions for the Zooniverse team, is a 501(c)(3). Individuals or organizations that need to link explicitly to a 501(c)(3) for their volunteering efforts use the Adler Planetarium as the reference. Documentation of the Adler Planetarium's 501(c)(3) status is provided here, and the Adler Planetarium EIN number is 36-6210902. When inputting the organization name, please use “Adler Planetarium - Zooniverse” if possible. If not possible, please use “Adler Planetarium” (which matches the EIN number). In all cases, you'll volunteer through Zooniverse.org.
For information on how to donate, please visit our donation page.