Global Instant Account-to-Account Payments, Pay-by-Bank and Open Banking Infrastructure Market — Intelligence Report

The global instant account-to-account payments, pay-by-bank and open banking infrastructure market is entering a structural scale-up phase as regulators, banks, payment schemes, processors and fintech platforms converge around real-time, lower-cost, bank-direct payment rails. Nexvora Intelligence estimates the addressable revenue pool at approximately $•••–$••• in 2025, spanning open banking connectivity, payment initiation services, instant payment processing, fraud and risk orchestration, merchant acceptance, bank API monetization, compliance tooling and value-added data services.

Market expansion is being driven by three reinforcing forces: regulatory mandates for open banking and instant payments, merchant demand for alternatives to card interchange, and consumer migration toward embedded, account-linked digital payment experiences. While account-to-account transfers are already mainstream in many domestic systems, the commercial opportunity is shifting from basic transfer rails toward merchant-grade acceptance, recurring payments, checkout optimization, dispute handling, liability frameworks and cross-border interoperability.

Pay-by-bank is emerging as the most commercially visible layer of the market. Nexvora Intelligence models global pay-by-bank-enabled merchant payment value at approximately $•••–$••• in 2025, with significant upside as ecommerce, bill payments, digital subscriptions, travel, gaming, insurance premiums and high-ticket retail adopt real-time bank payment options. Adoption remains uneven: Europe and parts of Asia-Pacific are structurally ahead on regulatory enablement and consumer familiarity, while North America is accelerating from a lower base as instant payment rails, bank consortia and commercial API models mature.

The competitive landscape is fragmenting into four principal archetypes: bank-owned or scheme-led instant payment operators, open banking infrastructure aggregators, payment service providers embedding pay-by-bank at checkout, and risk/data orchestration platforms that make account-based payments commercially viable at scale. The winning platforms are increasingly those that combine broad bank connectivity, high payment conversion, strong fraud controls, instant settlement visibility, fallback routing and merchant reconciliation into a single enterprise-grade stack.

Nexvora Intelligence developed the market view using a proprietary bottom-up and top-down modeling framework covering payment infrastructure revenues, merchant acceptance economics, open banking connectivity, payment initiation services, processing fees, fraud tooling, compliance software and data services.

Market sizing reflects modeled estimates only and should be interpreted as directional intelligence rather than externally sourced statistics.

The forecast incorporates assumptions on instant payment rail adoption, merchant pay-by-bank penetration, API standardization, regulatory implementation, pricing compression, transaction growth and regional maturity curves.

Regional leadership and growth outlooks were assessed through comparative analysis of regulatory readiness, bank connectivity depth, real-time payment usage, merchant adoption potential and infrastructure commercialization models.