Mainframe operating systems market seen reaching $2.13 billion by 2030

The Business Research Company says the global mainframe operating systems market will rise from $1.83 billion in 2025 to $2.13 billion by 2030, driven by transaction-heavy industries, hybrid cloud adoption and cybersecurity demand. North America led the market in 2025, while Asia-Pacific is expected to grow fastest through 2030.

Why it matters: - Mainframe operating systems remain core infrastructure for banks, payment networks and other large enterprises that need secure, high-volume transaction processing. - The market’s growth points to continued spending on legacy system support, modernization and resilience as financial activity and compliance demands rise.

What happened: - The Business Research Company released a 2026 report on the global mainframe operating systems market. - The market is forecast to grow from $1.83 billion in 2025 to $1.88 billion in 2026. - The report projects the market will reach $2.13 billion by 2030. - The forecast implies a 2.9% CAGR from 2025 to 2026 and a 3.1% CAGR through 2030. - North America held the largest share of the market in 2025. - Asia-Pacific is expected to post the fastest growth over the forecast period.

The details: - The report ties historical growth to enterprise reliance on legacy computing systems, large-scale transaction processing, banking and financial core systems, centralized IT infrastructure models and demand for reliable performance. - The forecast period is expected to benefit from migration toward hybrid cloud mainframe setups. - The report also points to rising demand for real-time transaction processing, stronger cybersecurity and compliance, API-based modernization of legacy applications, and AI-driven workload automation and optimization. - Key trends include AI-based workload optimization, expanded hybrid cloud integration, zero-downtime and high-availability architectures, API enablement for modernization, and advanced cybersecurity and identity management. - A mainframe operating system is described as a highly dependable and scalable software platform that manages mainframe hardware and supports secure, high-volume transaction processing and mission-critical workloads. - The systems provide workload management, virtualization, security and continuous availability for centralized computing in large organizations. - The report identifies rising financial transaction volume as a major growth driver. - Open Banking Limited reported in January 2026 that payment activity reached 351 million transactions in 2025, up 57% year over year. - The report includes Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, the Middle East and Africa in its regional analysis. - The 2026 report adds market attractiveness scoring, TAM analysis, company scoring matrix graphics and tables, Excel dashboards, market hotspots infographics, and updated graphics and tables. - The company offers a free sample of the report and the full market report.

Between the lines: - The modest growth rate suggests this is a mature market, but one that still attracts investment because core transaction systems are hard to replace. - The emphasis on hybrid cloud, APIs and AI shows mainframe vendors are competing on modernization, not just stability. - The transaction growth cited in the report supports the case that mainframes remain relevant where uptime, security and throughput matter most.

What's next: - The market is likely to keep expanding gradually as enterprises modernize legacy applications while preserving mainframe reliability. - Demand should remain tied to payment growth, compliance needs and ongoing hybrid cloud integration. - The fastest gains are expected in Asia-Pacific as enterprise digital infrastructure broadens.