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U.S. Firms Embrace GenAI to Migrate, Update Mainframes

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Information Services Group (ISG) reports that U.S. enterprises are increasingly adopting GenAI-based services for mainframe modernization and cloud migration. The 2025 ISG Provider Lens™ study reveals that GenAI is transforming how companies optimize mainframe software, reducing coding costs and timelines.

The report highlights that some U.S. companies are now choosing to reengineer mainframe software rather than replatform it to the cloud, as GenAI improves code inspection, documentation, and testing efficiency. Companies maintaining mainframes are benefiting from enhanced optimization services, with increased adoption of DevOps methodologies, containers, and APIs.

The study evaluates 54 providers across six quadrants, with DXC Technology and Wipro emerging as Leaders in five quadrants each. Notable developments include Banco Itaú Unibanco's planned migration to AWS by 2028, marking a significant shift in Latin America's mainframe landscape.

Information Services Group (ISG) riporta che le aziende statunitensi stanno adottando sempre più servizi basati su GenAI per la modernizzazione dei mainframe e la migrazione al cloud. Lo studio ISG Provider Lens™ del 2025 rivela che GenAI sta trasformando il modo in cui le aziende ottimizzano il software dei mainframe, riducendo i costi e i tempi di codifica.

Il rapporto evidenzia che alcune aziende statunitensi stanno ora scegliendo di reingegnerizzare il software dei mainframe piuttosto che ripiatformarlo nel cloud, poiché GenAI migliora l'ispezione del codice, la documentazione e l'efficienza dei test. Le aziende che mantengono i mainframe stanno beneficiando di servizi di ottimizzazione avanzati, con un aumento dell'adozione di metodologie DevOps, container e API.

Lo studio valuta 54 fornitori in sei quadranti, con DXC Technology e Wipro che emergono come Leader in cinque quadranti ciascuno. Sviluppi notevoli includono la pianificata migrazione di Banco Itaú Unibanco verso AWS entro il 2028, segnando un cambiamento significativo nel panorama dei mainframe in America Latina.

Information Services Group (ISG) informa que las empresas estadounidenses están adoptando cada vez más servicios basados en GenAI para la modernización de mainframes y la migración a la nube. El estudio ISG Provider Lens™ de 2025 revela que GenAI está transformando la forma en que las empresas optimizan el software de mainframe, reduciendo costos y plazos de codificación.

El informe destaca que algunas empresas estadounidenses ahora eligen reingenierizar el software de mainframe en lugar de replatformarlo en la nube, ya que GenAI mejora la inspección de código, la documentación y la eficiencia de las pruebas. Las empresas que mantienen mainframes se benefician de servicios de optimización mejorados, con un aumento en la adopción de metodologías DevOps, contenedores y API.

El estudio evalúa a 54 proveedores en seis cuadrantes, con DXC Technology y Wipro emergiendo como Líderes en cinco cuadrantes cada uno. Desarrollos notables incluyen la migración planificada de Banco Itaú Unibanco a AWS para 2028, marcando un cambio significativo en el panorama de mainframes en América Latina.

정보 서비스 그룹 (ISG)는 미국 기업들이 메인프레임 현대화 및 클라우드 마이그레이션을 위해 GenAI 기반 서비스를 점점 더 많이 채택하고 있다고 보고합니다. 2025 ISG 공급자 렌즈™ 연구에 따르면 GenAI는 기업들이 메인프레임 소프트웨어를 최적화하는 방식을 변화시키고 있으며, 코딩 비용과 일정을 줄이고 있습니다.

보고서는 일부 미국 기업들이 클라우드로 재플랫폼하기보다는 메인프레임 소프트웨어를 재설계하는 것을 선택하고 있다고 강조합니다. GenAI는 코드 검사, 문서화 및 테스트 효율성을 개선합니다. 메인프레임을 유지하는 기업들은 DevOps 방법론, 컨테이너 및 API의 채택 증가와 함께 향상된 최적화 서비스의 혜택을 보고 있습니다.

이 연구는 여섯 개 사분면에서 54개의 공급자를 평가하며, DXC Technology와 Wipro가 각각 다섯 개 사분면에서 리더로 부각되고 있습니다. 주목할 만한 발전으로는 2028년까지 AWS로의 마이그레이션을 계획하고 있는 Banco Itaú Unibanco가 있으며, 이는 라틴 아메리카의 메인프레임 환경에 중대한 변화를 의미합니다.

Information Services Group (ISG) rapporte que les entreprises américaines adoptent de plus en plus des services basés sur GenAI pour la modernisation des mainframes et la migration vers le cloud. L'étude ISG Provider Lens™ de 2025 révèle que GenAI transforme la manière dont les entreprises optimisent le logiciel des mainframes, réduisant les coûts et les délais de codage.

Le rapport souligne que certaines entreprises américaines choisissent désormais de réingénierie le logiciel des mainframes plutôt que de le replatformer dans le cloud, car GenAI améliore l'inspection du code, la documentation et l'efficacité des tests. Les entreprises qui maintiennent des mainframes bénéficient de services d'optimisation améliorés, avec une adoption accrue des méthodologies DevOps, des conteneurs et des API.

L'étude évalue 54 fournisseurs à travers six quadrants, avec DXC Technology et Wipro se distinguant en tant que leaders dans cinq quadrants chacun. Des développements notables incluent la migration prévue de Banco Itaú Unibanco vers AWS d'ici 2028, marquant un changement significatif dans le paysage des mainframes en Amérique latine.

Information Services Group (ISG) berichtet, dass US-Unternehmen zunehmend GenAI-basierte Dienstleistungen für die Modernisierung von Mainframes und die Migration in die Cloud annehmen. Die ISG Provider Lens™-Studie von 2025 zeigt, dass GenAI die Art und Weise verändert, wie Unternehmen Mainframe-Software optimieren, indem sie die Codierungskosten und -zeiten senkt.

Der Bericht hebt hervor, dass einige US-Unternehmen jetzt wählen, die Mainframe-Software neu zu gestalten, anstatt sie in die Cloud zu verlagern, da GenAI die Codeinspektion, Dokumentation und Testeffizienz verbessert. Unternehmen, die Mainframes betreiben, profitieren von verbesserten Optimierungsdiensten, mit einer zunehmenden Annahme von DevOps-Methoden, Containern und APIs.

Die Studie bewertet 54 Anbieter in sechs Quadranten, wobei DXC Technology und Wipro in jeweils fünf Quadranten als Führer hervorgehen. Bemerkenswerte Entwicklungen umfassen die geplante Migration von Banco Itaú Unibanco zu AWS bis 2028, was einen bedeutenden Wandel in der Mainframe-Landschaft Lateinamerikas markiert.

Positive
  • GenAI implementation reduces mainframe modernization costs and development timelines
  • Enhanced efficiency in code inspection, documentation, and testing processes
  • Growing market adoption of mainframe optimization services
  • Increased integration capabilities between mainframe data and cloud systems
Negative
  • Conventional large language models (LLMs) still cannot fully understand application architecture
  • Legacy systems require significant updates to meet new security and compliance rules

GenAI features of mainframe services reduce cost, development time in application modernization and cloud migration, ISG Provider Lens™ report says

STAMFORD, Conn.--(BUSINESS WIRE)-- U.S. enterprises are adopting GenAI-based services both to migrate mainframe workloads to the cloud and to keep their legacy systems productive, according to a new research report published today by Information Services Group (ISG) (Nasdaq: III), a global AI-centered technology research and advisory firm.

The 2025 ISG Provider Lens™ Mainframe — Services and Solutions report for the U.S. and Brazil finds that GenAI is significantly changing how enterprises and service providers modernize and optimize mainframe software. Though not yet running GenAI applications on mainframes, companies are taking advantage of GenAI tools that can reduce coding costs and timelines.

“The functions that mainframes have always performed are still essential to many enterprises, and GenAI provides new ways to maximize their value,” said John Schick, ISG consulting lead on mainframe computing. “Service providers are using GenAI to open up new possibilities for clients.”

GenAI has improved application modernization techniques to the point where some U.S. companies are deciding to reengineer mainframe software rather than replatform it to the cloud, the report says. Replatforming has been popular for achieving quick savings, but GenAI is boosting demand for reengineering with more efficient code inspection, documentation and testing. Expectations for modernized software have also changed: Until 2024, most enterprises wanted providers to ensure that it behaved just like legacy applications, but now more are open to innovations that add value.

The report also examines mainframe application modernization in Brazil, where companies face many of the same challenges as their counterparts in the U.S. Demand for modernization is rising in Brazil, especially in banking, insurance and retail. Banco Itaú Unibanco, the largest retail bank in Latin America and until recently the site of the Brazil’s largest mainframe, recently announced it will complete its migration to AWS by the end of 2028.

U.S. enterprises that choose to keep their mainframes are also benefiting from GenAI through enhanced mainframe optimization services, ISG says. A growing number of companies are adopting DevOps methodologies, containers and APIs to improve their development and maintenance platforms. Many need to integrate mainframe data with the cloud and update applications to meet new security and compliance rules. Providers are using GenAI-based code inspection to accelerate the discovery of code changes and modernization of legacy code.

Most vendors of mainframe application modernization software are also adding GenAI-powered features to ease enterprise use, the report says. Though conventional large language models (LLMs) have yet to fully grasp application architecture, companies can write code faster using toolsets based on GenAI that perform functions such as assessing applications, mapping dependencies and refactoring code bases.

“GenAI is accelerating mainframe migration by reducing risk,” said Jan Erik Aase, partner and global leader, ISG Provider Lens Research. “Enterprises evaluating their mainframes’ future now have less to fear and more to gain.”

The report also explores other mainframe trends in the U.S., including the rising use of GenAI for more efficient mainframe operations and the continued growth of mainframe as a service (MFaaS) outsourcing.

For more insights into the mainframe-related challenges faced by companies in the U.S. and Brazil, plus ISG’s advice for overcoming them, see the ISG Provider Lens™ Focal Points briefing here.

The 2025 ISG Provider Lens™ Mainframe — Services and Solutions report for the U.S. and Brazil evaluates the capabilities of 54 providers across six quadrants: Mainframe Optimization Services, Application Modernization Services – U.S., Application Modernization Services – Brazil, Mainframe as a Service, Mainframe Operations and Mainframe Application Modernization Software.

The report names DXC Technology and Wipro as Leaders in five quadrants each. It names Capgemini and Kyndryl as Leaders in four quadrants each and Ensono, Infosys and TCS as Leaders in three quadrants each. Accenture, Cognizant and FNTS are named as Leaders in two quadrants each. Astadia (Amdocs), Avanade, AWS, GFT, Google, HCLTech, Heirloom Computing, Hexaware, LTIMindtree, Mphasis, NTT DATA, Rocket Software, TmaxSoft and TSRI are named as Leaders in one quadrant each.

In addition, AveriSource, Cognizant, HCLTech and Kyndryl are named as Rising Stars —companies with a “promising portfolio” and “high future potential” by ISG’s definition — in one quadrant each.

In the area of customer experience, UST is named the global ISG CX Star Performer for 2024 among mainframe service providers. UST earned the highest customer satisfaction scores in ISG's Voice of the Customer survey, part of the ISG Star of Excellence™ program, the premier quality recognition for the technology and business services industry.

Customized versions of the report are available from Astadia, AWS, FNTS, Heirloom, Hexaware, RecoveryPoint and TSRI.

The 2025 ISG Provider Lens™ Mainframe — Services and Solutions report for the U.S. and Brazil is available to subscribers or for one-time purchase on this webpage.

About ISG Provider Lens™ Research

The ISG Provider Lens™ Quadrant research series is the only service provider evaluation of its kind to combine empirical, data-driven research and market analysis with the real-world experience and observations of ISG's global advisory team. Enterprises will find a wealth of detailed data and market analysis to help guide their selection of appropriate sourcing partners, while ISG advisors use the reports to validate their own market knowledge and make recommendations to ISG's enterprise clients. The research currently covers providers offering their services globally, across Europe, as well as in the U.S., Canada, Mexico, Brazil, the U.K., France, Benelux, Germany, Switzerland, the Nordics, Australia and Singapore/Malaysia, with additional markets to be added in the future. For more information about ISG Provider Lens research, please visit this webpage.

About ISG

ISG (Nasdaq: III) is a global AI-centered technology research and advisory firm. A trusted partner to more than 900 clients, including 75 of the world’s top 100 enterprises, ISG is a long-time leader in technology and business services that is now at the forefront of leveraging AI to help organizations achieve operational excellence and faster growth. The firm, founded in 2006, is known for its proprietary market data, in-depth knowledge of provider ecosystems, and the expertise of its 1,600 professionals worldwide working together to help clients maximize the value of their technology investments.

Press Contacts:

Will Thoretz, ISG

+1 203 517 3119

will.thoretz@isg-one.com

Julianna Sheridan, Matter Communications for ISG

+1 978-518-4520

isg@matternow.com

Source: Information Services Group, Inc.

FAQ

How is GenAI changing mainframe modernization according to ISG (III)?

GenAI is reducing coding costs and timelines, improving application modernization through efficient code inspection, documentation, and testing, while enabling companies to reengineer rather than just replatform mainframe software.

What are the key trends in mainframe services for 2025 according to ISG (III)?

Key trends include increased adoption of GenAI-based services, growing use of DevOps methodologies, containers and APIs, and continued growth of Mainframe as a Service (MFaaS) outsourcing.

Who are the leading mainframe service providers identified in the 2025 ISG (III) report?

DXC Technology and Wipro lead in five quadrants, followed by Capgemini and Kyndryl in four quadrants, and Ensono, Infosys, and TCS in three quadrants each.

What major mainframe migration is happening in Latin America according to ISG (III)?

Banco Itaú Unibanco, Latin America's largest retail bank, plans to complete its mainframe migration to AWS by the end of 2028.
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