We switched to Spark because it solved our core challenges at Guap; we can now focus on what matters — bringing accessible Bitcoin-powered payments to people worldwide.
The complete wallet toolkit


Launch your wallet in seconds directly into your stack — whether for personal use, or on behalf of users, businesses & merchants.
Plug and play your wallet's frontend & backend. Spark is unopinionated, we give developers full control over their internal operations.
Build snappy experiences with near-zero fees. No block confirmation or crazy mempool fees; just click send and it’s done.
Speak Bitcoin and Lightning, and instantly connect your wallet to hundreds of millions of users and deep pools of liquidity.
Let users cash in and out in seconds for almost zero fees — integrate instant & cheap bank transfers & card deposits.
Fintech your wallet. Issue physical cards, create virtual bank accounts, and build embedded financial products.