“Can an open-source self-custody crypto wallet also serve as a practical fiat on-ramp by embedding bank accounts directly into the wallet experience?”
Founded in 2017 as an open-source desktop cryptocurrency wallet focused on Ethereum Classic. Around 2022, the product expanded to include an ACH-enabled fiat wallet (emeraldwalletapp.com) powered by Sila and Evolve Bank & Trust, bridging self-custody crypto with bank-linked fiat deposits. The emerald.cash branch (EmeraldPay) has since evolved back toward a pure self-custody, no-account crypto wallet philosophy, while the emeraldwalletapp.com entity (Promotional Software Solutions, LLC d.b.a. Emerald Wallet) retains the BaaS-backed fiat wallet product.