Bitcoin is the world's first decentralized cryptocurrency, created by Satoshi Nakamoto in 2009 with a fixed supply of 21 million BTC. Known as "digital gold", it is the largest digital asset and supports instant micropayments via the Lightning Network.
BTCPay Server is an MIT-licensed, self-hosted Bitcoin payment processor with 0% platform cut and no third-party custody, bundling POS, donation buttons, pay links and crowdfunding, with Namecheap having processed over 73 million USD through it at the cost of running your own server and wallet security.
Strike Business puts treasury, Bitcoin collection and Bitcoin-collateral borrowing into one account, collecting over on-chain or Lightning and settling into USDT or BTC, with borrowing published at starting at 7.75% APR and no origination fee, provided you accept a Bitcoin-denominated business.
OpenNode is a Bitcoin-only payment processor offering on-chain and Lightning collection rails, per-transaction fiat conversion with locked rates, and roughly 1% standard processing fee per its official example.