PSP-neutral (or processor-agnostic) describes a payment infrastructure design philosophy in which the technology layer that manages transactions is not commercially, technically, or architecturally tied to any single payment service provider. A PSP-neutral platform can connect to multiple processors, decide which provider handles which payments, and add or remove PSPs without re-engineering its payment stack. The opposite of PSP-neutral is single-PSP dependency, where a business’s entire payment capability is built on one provider’s API, SDK, and commercial terms.
Single-PSP dependency is the default starting point for most businesses. When a company first integrates payments, it typically selects one processor, often Stripe, Adyen, or Braintree, and builds its payment flow around that provider’s specific API. This works well initially, but over time the limitations emerge. The PSP may not support a payment method the business needs in a new market. Its approval rates may underperform in certain regions. Its pricing may become uncompetitive as the business scales. Outages at the PSP mean downtime for the business. And migrating to a new provider means rebuilding the integration from scratch, re-certifying for PCI compliance, and managing a complex data migration.
A PSP-neutral architecture avoids rebuilding the integration for each new provider by inserting an abstraction layer between the business and its PSPs. This layer gives the business one API, and transaction and refund data in one format, across all connected processors. The business integrates once with the abstraction layer and gains access to multiple PSPs without additional engineering work. Depending on the product, the layer may route transactions by payment method alone or, in orchestration products, by geography, cost or performance.
Shuttle Global is built on a PSP-neutral architecture from the ground up. Rather than acting as a PSP itself, Shuttle serves as a payment layer that connects platforms to 40+ PSPs through a single API. Platforms using Shuttle’s Embedded Payments, Links Checkout, or Voice Checkout are not tied to a single processor. They can onboard new PSPs as they expand into new markets, run each merchant or business entity on its own gateway, and send each payment method to its own gateway, for example cards through Stripe, ACH through Authorize.net and direct debit through GoCardless. If a gateway is down, the platform can move the affected payment types to another connected gateway. There is no automatic failover, and saved cards stay with the gateway that stored them, so repeat payments on stored cards will not run through the second one.