Payments Infrastructure · Commerce & Payments
Should you build or buy Account-to-Account / Open Banking Payments?
Account-to-account (A2A) and open banking payments software lets businesses initiate bank-to-bank transfers directly from a customer's account — bypassing card networks entirely — using regulated open banking APIs or payment initiation services. It covers checkout pay-by-bank flows, payout disbursements, and recurring debit mandates, providing lower transaction costs than cards for merchants and real-time settlement where local rails support it.
The build-vs-buy decision for Account-to-Account / Open Banking Payments turns almost entirely on regulatory access — the licensed bank connectivity and payment initiation permissions that vendors hold across dozens of markets are the entire product — and on how valuable A2A-specific cost savings are relative to the complexity of maintaining that access; the geography and transaction volume specifics decide it.
Build it, buy it, or bridge?
When building makes sense
There is no practical scenario in which a typical company builds its own A2A open banking payment rail from scratch. The core value of a platform like TrueLayer, Volt, or Yapily is the licensed payment initiation infrastructure it maintains across markets — payment service provider (PSP) licenses under PSD2 in Europe, FCA authorization in the UK, and equivalent regional regimes elsewhere. Obtaining those licenses takes years, requires capital, and subjects the holder to ongoing regulatory supervision. Beyond the licenses themselves, maintaining live connectivity to hundreds of banks via open banking APIs and backup credential-based flows is a continuous engineering and compliance operation. The only companies that have something approximating a self-built equivalent are the largest banks and payment processors themselves — institutions that are already regulated and for whom connectivity is the core business. For any other company, including large fintechs, the infrastructure is not buildable at reasonable cost.
When buying makes sense
Buying A2A and open banking payments infrastructure is the only realistic path for virtually every company outside the banking sector. Vendors like TrueLayer, Volt, Yapily, and Tink have already done the work of obtaining payment initiation licenses, maintaining bank API connections, handling certification changes, and keeping reconciliation workflows current. The economics are strongly in favor: per-successful-payment fees are a fraction of card interchange, and the cost of failed payments (which vendors are also working to reduce) is far lower than the cost of building and maintaining equivalent connectivity. Companies choosing between vendors should focus on market coverage — which banks and geographies are live — payment success rates, and the quality of reconciliation and webhook infrastructure, not on whether to internalize the rail itself.
The desk read
A2A payment initiation is licensed bank connectivity infrastructure. TrueLayer, Volt, and Yapily maintain live integrations across thousands of bank institutions under open banking regulatory frameworks that require direct bank partnerships or scheme authorization. That connectivity is the product. The bank relationships and regulatory authorizations are the moat, not the software, and assembling them independently isn't a software engineering problem.
The relevant decision for any organization using A2A rails is which aggregator's coverage and reliability best matches their payment geography and use case. Tink and Token.io each carry different institutional footprints. AI is influencing A2A in adjacent ways, improving fraud detection on bank data and adding smarter payment retry logic, but those are product layers built on top of the rail.
Frequently asked
What is Account-to-Account / Open Banking Payments software?
Account-to-account (A2A) and open banking payments software lets businesses initiate bank-to-bank transfers directly from a customer's account — bypassing card networks — using regulated open banking APIs or payment initiation services. It covers checkout pay-by-bank flows, payout disbursements, and recurring debit mandates.
When does building Account-to-Account / Open Banking Payments make sense?
It rarely makes sense outside of banks and major payment processors, because the value is the licensed bank connectivity infrastructure itself. Obtaining payment initiation licenses across markets takes years and ongoing regulatory capital that most companies cannot justify.
When does buying Account-to-Account / Open Banking Payments make sense?
Buying is the path for essentially every merchant or platform — vendors provide licensed connectivity across markets at per-transaction rates that undercut card interchange, with reconciliation and webhook infrastructure included. The choice is which vendor, not whether to use one.
What are the main Account-to-Account / Open Banking Payments vendors?
Representative vendors include TrueLayer, Volt, Yapily, Tink, Token.io. B4 Pro scores the full set.