“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.
Emerald Wallet discloses Evolve Bank & Trust as its banking provider, according to the Embedded Finance Index 2026.
Emerald Wallet does not disclose a bank charter of its own; its banking services are provided through Evolve Bank & Trust.
Emerald Wallet moves money over ACH.
Emerald Wallet's crypto products run on Sila.
The Embedded Finance Index 2026 maps 4 layers in Emerald Wallet's stack: Money movement (ACH); Banking / BaaS (Evolve Bank & Trust); Sponsor bank (Evolve Bank & Trust); Crypto (Sila).
Emerald Wallet was founded by Igor Artamonov and is founded in 2017, headquartered in Cayman Islands (registered); London, England (mailing address); Zug, Switzerland (also cited).
Get a read on where your own stack stands against Emerald Wallet and the rest of its category — what they built versus bought, which providers they use, and where the gaps in your own strategy and competitive set actually are.