GrapheneOS, an open-source project, relies on donations from individuals, companies, and organizations to fund its operations. These contributions are vital for paying developers, acquiring necessary hardware like workstations and testing devices, covering infrastructure costs such as servers and domains, and managing legal fees. Donations may also support other essential project-related expenses.

GrapheneOS offers a variety of donation methods. GitHub Sponsors allows for recurring or one-time credit card donations with preset tiers or custom amounts. Cryptocurrency donations are accepted via Bitcoin (using Bech32, Bech32m, or BIP47 payment codes), Monero, Zcash, Ethereum (ETH only, no tokens), Cardano (including the $grapheneos handle), and Litecoin (using Bech32 addresses).

For those preferring traditional methods, GrapheneOS accepts donations through Wise, including a Quick Pay link and various local bank transfer options in EUR, GBP, USD, AUD, NZD, CAD, HUF, and TRY. PayPal is also an option for one-time, monthly, or yearly contributions, with specific donation links for different currencies and an email address for direct transfers. Canadian users with a Canadian bank account can utilize Interac e-Transfer to donate in CAD.