Longstone

Platform

The platform is built and in testing.

Longstone wrote its own software for the bank it intends to run. It covers the everyday work of a full-service bank, with digital asset products built in.

  • 26
    applications and modules
  • 1.3 million+
    lines of purpose-written code
  • 25,000+
    automated tests

Figures as of September 28, 2026.

What it does

  • Onboarding

    Account opening for individuals and businesses, with identity checks and sanctions screening.

  • Accounts and statements

    Balances, activity, statements, and tax documents, including tax lot accounting for crypto trading.

  • Payments

    Real-time payments, transfers, bill pay, and paycheck routing, with holds and releases under dual control.

  • Stablecoins

    Conversion to and from stablecoins alongside a customer’s accounts.

  • Cards

    Debit card issuance, card controls, and a rewards engine.

    Cashback rewards credit card and credit card accessible line of credit collateralized by Bitcoin under development.

  • Lending

    Loans secured by Bitcoin, from origination through collateral monitoring and margin calls.

  • Trading

    Buying and selling digital assets, from simple orders to a professional trading screen.

  • Custody

    Records and controls for customer digital assets held with an established custody provider, reconciled against the ledger.

  • Relationship management

    A customer relationship system built by Longstone, so that a banker sees the whole relationship and can act on it.

  • Staff tools

    The tools bank staff will work in: customer service, approvals, alerts, billing, and reporting.

How it is controlled

  • Tamper-evident records

    Sensitive actions are designed to be recorded in append-only logs that can be independently verified.

  • A second person for money movement

    Money movement, rate changes, and default decisions are designed to require a second authorized person.

  • Built to keep running

    Each outside system sits behind an interface with a documented manual fallback, so that operations can continue if a vendor is unavailable.

  • Tested continuously

    The automated test suite runs against the code every time it changes.

See it working

The loan example on the home page is connected to the platform. Each time the page loads, it asks the platform’s pricing service for the current rate table and Bitcoin price.

Try the loan example

Where it stands

The platform is in pre-production. Connections to outside vendors are coded and run in test mode until contracts are signed and the bank is acquired. It has not operated with customer funds, and it has not been independently audited, penetration-tested by a third party, or security-certified. Independent validation is planned before launch, including a third-party penetration test and a code audit of the paths that move money.

Longstone owns the code it wrote. It relies on established third-party vendors for key areas such as the core banking system, compliance, and custody.