Banks worldwide are abandoning the idea of building all their own technology from scratch. Instead, they're turning to third-party software providers at an accelerating pace, with the global market expected to grow from USD 39.2 billion in 2026 to USD 112.4 billion in 2035, a compound annual growth rate of 12.4%. This shift represents a fundamental change in how financial institutions approach digital transformation, compliance, and customer experience.

Why Are Banks Outsourcing Their Software Infrastructure?

Financial institutions face mounting pressure to modernize quickly without the massive capital investment required to develop technology in-house. Third-party banking software allows banks to implement cloud-based core banking solutions, digital payment channels, lending platforms, and more without building these systems from the ground up. The appeal is straightforward: speed, cost savings, and access to specialized expertise that would take years to develop internally.

The regulatory environment has become another major driver. Banks now operate under tightening requirements for anti-money laundering (AML), Know Your Customer (KYC) compliance, fraud detection, cybersecurity, and data protection. Manual management of these regulations is increasingly impractical, which is why third-party software that automates compliance monitoring, regulatory reporting, and transaction screening has become essential.

What Specific Market Trends Are Fueling This Growth?

Several interconnected forces are accelerating demand for third-party banking software:

• Open Banking Regulations: The U.S. Consumer Financial Protection Bureau's final rule under Section 1033 of the Dodd-Frank Act, which took effect on January 17, 2025, mandates consumer access to financial data and requires banks to interface with third-party platforms at scale. Similarly, the European Union's PSD2 framework has compelled banks across 30+ countries to expose standardized APIs to licensed third parties since 2019.
• Real-Time Payment Demand: Customers now expect instant transactions, forcing banks to upgrade payment infrastructure. Third-party banking software facilitates fast transaction processing, payment orchestration, fraud monitoring, and liquidity management across local and international payment systems.
• Cloud Migration: Financial organizations are moving from on-premises systems to cloud-native banking solutions for greater scalability, flexibility, and cost efficiency. Cloud-based third-party software enables quick service deployment, easy upgrades, reduced infrastructure costs, and improved disaster recovery.
• AI-Powered Capabilities: Artificial intelligence integration is becoming indispensable in third-party banking software, automating routine tasks including customer onboarding, fraud detection, credit scoring, compliance management, and customer service.

How Are Banks Structuring Their Technology Ecosystems?

A new architectural approach called composable banking is reshaping how financial institutions select and integrate software. Rather than relying on a single monolithic core banking system, banks are choosing specialized solutions from multiple third-party vendors for payments, loans, customer relationship management, regulatory compliance, and analytics. This modular approach allows institutions to innovate quickly, update systems easily, and adapt to changing business needs without the lengthy implementation timelines associated with traditional core banking replacements.

Banking-as-a-Service (BaaS) is another transformative trend. This model gives non-banking entities access to banking services via third-party platforms using application programming interfaces (APIs), which are standardized tools that allow different software systems to communicate. Financial services companies are now collaborating with fintech companies, retailers, tech companies, and digital platforms to provide expanded services without building new infrastructure themselves.

Which Market Segments Are Growing Fastest?

Core banking software dominated the market in 2025, accounting for 30.3% of the total market share and is expected to grow at a compound annual growth rate of 11.6% through 2035. Core banking software serves as the backbone of banking systems, handling deposits, loans, accounts, payments, and client data through integrated platforms. Cloud-based core banking solutions are particularly attractive as banks seek to upgrade legacy systems.

Beyond core banking, the market encompasses omnichannel and multi-channel banking software, business intelligence and analytics tools, private wealth management platforms, compliance and risk management systems, and payment processing solutions. Each segment addresses specific operational needs that banks increasingly prefer to outsource rather than develop internally.

What Challenges Are Slowing Adoption?

Despite rapid growth, significant obstacles remain. Third-party data privacy risks represent a major concern, as banks must trust external vendors with sensitive customer information. Legacy system integration challenges also persist, as many financial institutions operate decades-old infrastructure that doesn't easily connect with modern cloud-based solutions. Additionally, the Financial Stability Board has identified third-party concentration risk in financial technology as a systemic concern, accelerating regulatory scrutiny of vendor selection and oversight practices.

How to Evaluate Third-Party Banking Software for Your Institution

Financial institutions considering third-party software should assess several critical factors:

• Regulatory Compliance Capabilities: Verify that the software automates compliance monitoring, regulatory reporting, and transaction screening for AML, KYC, and other applicable regulations in your jurisdiction.
• API Integration and Composability: Ensure the software uses standardized APIs that allow seamless integration with other specialized solutions, enabling a modular architecture rather than forcing a monolithic system replacement.
• Cloud Infrastructure and Scalability: Confirm that the platform operates on cloud infrastructure with multi-cloud or hybrid-cloud support, enabling quick service deployment, easy upgrades, and disaster recovery capabilities.
• AI and Fraud Detection Features: Assess whether the software includes machine learning capabilities for fraud detection, credit scoring, customer onboarding automation, and predictive analytics to improve operational efficiency.
• Vendor Security and Data Privacy: Conduct thorough due diligence on the vendor's security practices, data protection measures, and compliance with regulatory requirements to mitigate third-party concentration risk.

The market leader, Fiserv, held over 16.1% market share in 2025, while the top five players (Finastra, FIS, Fiserv, Jack Henry, and SS&C Technologies) collectively controlled 45.6% of the market. This concentration among established vendors reflects the critical importance of choosing reliable, well-resourced partners for mission-critical banking infrastructure.

The shift toward third-party banking software represents more than a technology trend; it reflects a fundamental recognition that banks can no longer compete by building everything internally. As regulatory requirements tighten, customer expectations accelerate, and artificial intelligence capabilities expand, outsourcing specialized software functions has become not just an option but a strategic necessity for financial institutions of all sizes.