River

River is a Bitcoin-only financial institution founded in 2019 and based in the United States. The firm describes itself as client-first and built for long-term investors, with the stated ambition of becoming the bitcoin bank of the world. Its scope is deliberately narrow: it works with Bitcoin and no other cryptocurrencies.

Engineering work at River centres on custody and security infrastructure. Its flagship product is a full-reserve Bitcoin custody system built from the ground up to maximise security and minimise dependence on third parties. All client Bitcoin is held in full reserve, with no lending of client assets under any circumstances. The technical domains involved include Bitcoin custody, full-reserve custody systems, security infrastructure, cryptocurrency wallet technology and financial technology.

The product line also includes a Bitcoin wallet for managing holdings in one place, automated recurring Bitcoin purchases with zero fees, and options to receive pay via direct deposit in Bitcoin. Alongside the infrastructure, the company prioritises U.S.-based human support, and states that its team is composed of Bitcoiners building products for Bitcoiners.