Castle (formerly Orqestra), a bitcoin treasury platform for small and medium-sized businesses, has raised $1 million in a pre-seed round to accelerate its rollout across the U.S. The round was led by Boost VC, with participation from Winklevoss Capital, Park Rangers Capital, Epoch VC, and a group of angel investors.
Founded by longtime bitcoiners Stephen Cole and João Almeida, the Miami-based startup automates the process of converting business revenue into bitcoin. Castle’s platform integrates with popular payment and bookkeeping tools, allowing businesses to allocate a portion of their income into bitcoin based on customizable rules. With automation built in, it helps business owners protect their savings from inflation while maintaining liquidity for operating expenses.
“Most savings products used by small and medium businesses, despite being framed as high-yield, actually lose money after accounting for inflation,” Cole, Castle’s CEO, shared in a statement. “Bitcoin, with its strictly limited supply, has been the best-performing asset of the past decade and we’re excited to bring it to companies across America.”
Almeida, Castle’s CTO, added that the product was designed to be nearly invisible. “By integrating with tools like QuickBooks, PayPal, Square, and Stripe, our platform gives businesses intelligent bitcoin exposure aligned with their operational requirements. Castle is built to be invisible so owners can focus on what they do best and know their bitcoin treasury will look the way they want.”
The platform supports a range of strategies, from conservative to aggressive, allowing each business to define how much of their holdings should be kept in bitcoin. Users can set recurring allocations, define cash thresholds that trigger purchases or sales, and limit their exposure to a minimum or maximum percentage of total assets.
Castle’s customers already span industries like restaurants, fitness, accounting, e-commerce, SaaS, real estate, and fine art. The product appeals to business owners who want exposure to bitcoin but need a way to manage it in line with their day-to-day operations and risk profile.
The round’s backers pointed to Castle’s emphasis on utility and execution over speculation.
“We see bitcoin as the world’s most powerful savings technology, and Castle is making it easy and accessible for small and medium businesses,” said Brayton Williams, Managing Partner of Boost VC. “The founders are veteran bitcoiners and tech leaders, combining a rare sense of mission and execution ability.”
Cameron and Tyler Winklevoss, whose family office also invested in the round, said: “Bitcoin is the ultimate store of value. Unlike fiat, it protects the value of your life’s work. Castle lives up to its name by helping businesses safeguard their balance sheet by automatically converting a portion of every sale into bitcoin.”
Cole believes the next decade will see widespread adoption of bitcoin by Main Street businesses.
“Bitcoin isn’t just for Silicon Valley and Wall Street, it’s also for Main Street,” he said. “We believe all businesses will begin upgrading to bitcoin over the next 10 years, and those earliest to do so stand to benefit the most.”
Pictured at the top of this post: Left to right, Castle co-founders João Almeida (CTO) and Stephen Cole (CEO).
READ MORE IN REFRESH MIAMI:
- Payabli raises $28M to turn software companies into payments powerhouses
- Rails launches with $14M to fix what FTX broke
- Inside CAT Labs, the Miami startup racing to stop crypto crime before it vanishes
- Palla raises $14.5M to power instant cross-border payments for banks
- GoQuant nabs $4M to make crypto trading faster than ever
- PRIMA raises $5M to turn hot tables into a referral business - September 4, 2026
- WellStack acquires DeLorean AI, plans to grow platform and South Florida footprint - September 3, 2026
- Inside OpenSeed’s plan to bring calm back to work, 12 minutes at a time - September 3, 2026