Castle is a bitcoin-powered financial stack and automated bitcoin treasury platform built for U.S. businesses. Castle's Twitter Score is 14 out of 1000 as of October 2026, ranking #71,119 among 498,181 tracked accounts.
Castle operates as the DBA of Orqestra, Inc., a Delaware corporation, and offers businesses a way to allocate a percentage of revenue into bitcoin through integrations with platforms including Square, Stripe, Shopify, Mindbody, Clover, QuickBooks, and Xero. Its Cash Account feature converts funds to the USDB stablecoin and pays rewards in bitcoin; the company is not a bank, broker-dealer, or insured entity. The service is available exclusively to U.S. business entities and is subject to AML and sanctions screening.
Castle was co-founded by Stephen Cole as Co-founder and CEO and João Almeida as Co-founder and CTO. The company raised a $1 million oversubscribed pre-seed round in June 2025, led by Boost VC, with additional backing from Winklevoss Capital, Park Rangers Capital, and Epoch VC. Bitcoin custody is handled through third-party custodian BitGo.
Castle has published 276 posts on the platform. The account has been mentioned by 11 accounts, with 25 total mentions.
Who follows Castle on X?
The accounts that follow Castle include 81 founders, 11 angel investors, 37 influencers and 2 VCs. Among them are The Bitcoin Historian, Dylan LeClair, Mark Beylin, Mark W. Yusko - Two Point One Quadrillion, My and Marty Bent.