Donate

Catenary is run by volunteers and funded by donations. We don't have any ads or sponsors on our site, yet it relies on several servers and services to keep running. So if you can, please consider donating to keep Catenary free, open, and running for everyone!

Catenary is a registered 501(c)(3) nonprofit organization in the United States, and a public benefit corporation registered in the state of California. Donations are tax-deductible to the extent allowed by law.