Heirloom® recognized as the multi-platform Leader for Mainframe Application Modernization Software
ISG Mainframe Report—Introduction
Information Services Group (ISG), a well-known technology research and advisory firm renowned for its industry and technology expertise, has named Heirloom Computing a Leader in its Mainframe Services & Solutions U.S. 2025 Quadrant Report.
Heirloom Computing’s toolset offers rapid transformations with precise results. It has added GenAI capabilities to enhance speed and quality, delivering clean Java code that is easy to improve and maintain.
Companies that receive the Leader award in the ISG mainframe report have a comprehensive product and service offering, a strong market presence, and an established competitive position. The product portfolios and competitive strategies of Leaders are strongly positioned to win business in the markets covered by the study. The Leaders also represent innovative strength and competitive stability.
Enterprises with IBM mainframes are increasingly looking to modernize their mainframe ecosystem. Increasing costs, decreasing skills, and a need to make application workloads more agile are driving the modernization wave. Heirloom migrates mainframe workloads using compiler-based refactoring to produce cloud-native applications that run on every platform.
Highlights from the report:
Heirloom Computing offers a differentiated replatforming and refactoring technology renowned for its rapid processing of large code bases. It generates native Java applications that run on any cloud, enabling clients to retain source code in COBOL/PL1 or Java.
Industry Analysis
Market Transformation Trends
The 2025 ISG mainframe report highlights significant growth in enterprise modernization initiatives. This comprehensive analysis evaluated 54 providers across six quadrants, examining capabilities in mainframe optimization, application modernization services, and cloud migration solutions.
According to the research, U.S. companies are increasingly adopting GenAI-based services to migrate mainframe workloads to the cloud while maintaining operational excellence. The study finds that artificial intelligence is transforming how enterprises and service providers approach mainframe application modernization.
“The functions that mainframes have always performed are still essential to many enterprises, and GenAI provides new ways to maximize their value,” the report notes.
GenAI Accelerating Migration
Research from the ISG mainframe report reveals that GenAI is reducing both risk and complexity in mainframe modernization projects. According to ISG’s findings, GenAI-powered tools are streamlining code assessment, dependency mapping, and application refactoring processes. The analysis notes that enterprises now have access to more sophisticated modernization approaches that preserve business logic while enabling cloud-native deployment.
Most vendors of mainframe application modernization software are adding GenAI-powered features to ease enterprise adoption, the study confirms. These tools accelerate migration timelines while maintaining application integrity and business continuity.
Competitive Landscape
The ISG evaluation assessed providers across multiple criteria including technology innovation, competitive strength, and portfolio completeness. The comprehensive study recognized leaders across various modernization approaches and deployment models. Heirloom Computing earned Leader status in the Mainframe Application Modernization Software quadrant for its compiler-based technology that generates native Java applications deployable across any infrastructure platform.