Features

Integrations

Features

Pricing

Features

Pricing

Features

Strengthen Your Business with Bitcoin

Transform everyday revenues into a strategic bitcoin position—automatically.

Get Started

"Castle has been a game-changer for our restaurant. We're not just keeping up, we're getting ahead."

Steven

Restaurant Owner, SF Bay

"Castle has been a
game-changer for our restaurant. We're not just keeping up, we're getting ahead."

Steven

Restaurant Owner, SF Bay

Why Us

Why Businesses
Choose Castle

Built with purpose: simplify your operations, save your time, fortify your capital.

10+

Platform Integrations

80%

Avg Annual BTC Growth (CAGR)

Zero

Hours Spent Training Staff

Features

Your Bitcoin Treasury, Automated

Focus on your business, let Castle manage the treasury

Recent Transactions

See All

All time

1 year

1 month

1 week

Bitcoin

August 21, 2025

$128,000

0,0012920302 BTC

Bitcoin

August 21, 2025

$21,000

0.20 BTC

Bitcoin

August 21, 2025

$128,000

1.19 BTC

Payment provider

Quickbooks

Connect Quickbooks as your payment provider

Stripe

Connect Stripe as your payment provider

Recent Transactions

See All

All time

1 year

1 month

1 week

Bitcoin

August 21, 2025

$128,000

0,0012920302 BTC

Bitcoin

August 21, 2025

$21,000

0.20 BTC

Bitcoin

August 21, 2025

$128,000

1.19 BTC

Payment provider

Quickbooks

Connect Quickbooks as your payment provider

Stripe

Connect Stripe as your payment provider

Recent Transactions

See All

All time

1 year

1 month

1 week

Bitcoin

August 21, 2025

$128,000

0,0012920302 BTC

Bitcoin

August 21, 2025

$21,000

0.20 BTC

Bitcoin

August 21, 2025

$128,000

1.19 BTC

Payment provider

Quickbooks

Connect Quickbooks as your payment provider

Stripe

Connect Stripe as your payment provider

Advanced Bitcoin Accumulation

Link your payment or bookkeeping platforms to enable dynamic buying strategies

integrations including Shopify, Stripe, Square, QuickBooks and more

Automated buys as a percentage of revenue

Fixed-cost recurring buys (DCA)

Manually buy any time with low fees

Upgrade Your Balance Sheet

Minimize idle cash, maximize long-term value

Set thresholds on account balances to keep your allocations right-sized

Regularly sweep excess funds into bitcoin

Set limits on BTC as a percentage of holdings

Inflation-proof your business

Performance

Invested

Portfolio

Conversion Overview

You have a total of $8.37 pending to convert.

Change Strategy

28%

Performance

Invested

Portfolio

Conversion Overview

You have a total of $8.37 pending to convert.

Change Strategy

28%

Performance

Invested

Portfolio

Conversion Overview

You have a total of $8.37 pending to convert.

Change Strategy

28%

Purpose-Built for SMBs

The most powerful way to save, made seamless

A platform that understands small and medium businesses, to help save time and grow wealth

Invisible to customers and staff—no training required

Dollars back in your account when you need them

Reporting made simple

Integrations

Integrations to keep everything in sync.

Keep everything

in sync with our integrations.

Link your payment or bookkeeping platform to keep allocations right-sized to your business

Connect your payment processors and automatically convert a percentage of every transaction into bitcoin.

Payment Providers

Shopify

Stripe

Square

Paypal

Mindbody

Clover

Ebay

Gumroad

Zaprite

Bookkeeping Software

QuickBooks

Xero

View all integrations

FAQs

Frequently Asked Questions

Why bitcoin?

Bitcoin is the only cryptocurrency (only asset in the world, in fact) that has a truly limited, unchangeable supply. When it comes to savings, it's the best tool for the job.

Why bitcoin?

Bitcoin is the only cryptocurrency (only asset in the world, in fact) that has a truly limited, unchangeable supply. When it comes to savings, it's the best tool for the job.

Will you add support for other cryptocurrencies?

Nope. But for an important reason: we don't think any other cryptocurrencies are well-suited for protecting wealth long-term. None of them offer the supply-side assurances that you get by holding bitcoin, with its limited and truly unchangeable supply of 21 million.

Will you add support for other cryptocurrencies?

What countries are you in?

US only at this time.

What countries are you in?

US only at this time.

What are the fees like?

Free to sign up. We charge a transaction fee of about 1% on buys and sells of bitcoin, with no added spread or funny business.

What are the fees like?

Free to sign up. We charge a transaction fee of about 1% on buys and sells of bitcoin, with no added spread or funny business.

Will you add more integrations over time?

Absolutely. Got a favorite you'd like to see us add? Email us letting us know: hello@savewithcastle.com

Will you add more integrations over time?