AS/400 Solutions

Our IBM iSeries midrange modernisation solutions deliver modern, Cloud-enabled applications and databases that are functionally equivalent to their legacy counterparts, eliminating the hassle and expense of the mainframe. This reduces cost, allows for deeper integration, and enables customisation to meet business requirements. These solutions are great for migrating AS/400 based applications to Cloud-native languages such as Java and C#, and legacy databases to relational models.

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Why modernise?


Scarcity of domain expertise

Developers and database administrators who understand iSeries technology are reaching retirement age, resulting in a steadily diminishing talent pool. As this shortage grows, the costs and risks of relying on legacy languages and databases will continue to rise.

Limited flexibility

Companies are rapidly moving to modern environments and practices such as DevOps and the cloud, whilst midrange patforms - and the languages and databases that support them - were not designed for modern IT; resulting in difficult integrations and limited flexibility.

Exorbitant costs

Mainframes and midrange platforms cost as much as 4,500% more to operate than equivalent cloud counterparts, a figure compounded by a scarcity of development resources and rising licensing and maintenance fees for ancillary utilities, applications, and databases.

iSeries Modernisation Suite


To thrive in today's digital world, organisations must develop a mastery of rapid response, effortless course correction, and unencumbered agility in the face of competitive innovation. This is particularly difficult for large firms with rich heritage because of their reliance on outdated, inflexible midrange systems such as the AS/400, which is reliant on RPG and COBOL. These mission-critical systems are expensive to run and contain unique intellectual property and business processes developed over decades, rendering them difficult to replace by traditional means.

We offer a complete set of COBOL and RPG legacy modernisation tools based on decades of midrange migration experience. They extend unmatched flexibility with three rational approaches to evolutionary modernisation:

  1. iAnalysis
  2. iSeries Converter
  3. iSeries Express


advanced as400 iseries rpg migration


An analysis tool that provides a complete understanding of the application, infrastructure, and operational components of an iSeries environment. It exposes artefacts that organisations do not know they have, relationships they do not realise exist, and assets that are no longer in use. iAnalysis also provides stakeholders with valuable documentation to inform application modernisation decisions such as disposition strategies and target environment architectures. It also mitigates cost and risk by highlighting potential challenges and how to overcome them.

iSeries Converter

The fastest, most effective automated conversion to Java and open systems. Designed for clients without deep optimisation needs who are seeking 100% like-for-like functionality across platforms, Converter provides a low-risk, low cost path to migrate away from AS/400.

iSeries Express

A super-charged, optimised automated refactoring solution for clients with target state optimisation requirements and tight performance constraints. Express provides a highly automated migration based on configurable transformation models with the ability to consume flexible specifications whilst providing clean, efficient, and well-structured code to ease long-term maintenance.

The iSeries Modernisation Suite unlocks a whole new world of quality and scalability for midrange migrations, from automated testing to quality assurance, and the ability to leverage containerised deployments and orchestration with Docker and Kubernetes.

Over 35 years of mainframe modernisation experience

More than 500 successful modernisation projects completed

Over 2.5 billion lines of code refactored through automation

Intelligent Modernisation, Unparalleled Experience


Additional insights to help you modernize


  • 2021 Mainframe Modernisation Report

    Explore the the impact Covid-19 is having, and will continue to have, on modernisation plans, and the case for application modernisation amongst large enterprises with annual revenues over $1 billion.

    Read report
    an image associated with2021 Mainframe Modernisation Report Report
  • Siemens Healthineers

    Learn how refactoring 30 million lines of RPG/COBOL to Java future-proofed critical systems and reduced costs for providers across an industry.

    Read case study
    an image associated withSiemens Healthineers Case Study
  • Live Discussion: The 2021 Mainframe Modernisation Business Barometer Report

    Webinar Watch on demand
  • How cloud migration can help your organisation to go green

    Blog Read blog
  • Know the details, reduce the risk: How to begin your mainframe modernisation journey

    Webinar Watch on demand
  • Struggling to adopt DevOps? Maybe it’s because of your aging mainframe

    Blog Read blog

News & Opinions

BLOG // 29-07-2022

Webinar Recap: Modernising your Natural/Adabas for a more secure future

by Rob Anderson, Vice President of Marketing and Product for Application Modernization

Webinar Recap: Modernising your Natural/Adabas for a more secure future

Data Security & Application Modernisation

Data security is an increasing concern for organisations across the globe, and it is also a major driver for selecting modernisation strategies and cl…

by Rob Anderson, Vice President of Marketing and Product for Application Modernization

BLOG // 30-06-2022
Data Security & Application Modernisation

The state of legacy IT skills shortages

The recent pandemic seems to have jump-started a season of rapid change in IT, and companies with legacy systems are feeling this shift the hardest.

by Rob Anderson, Vice President of Marketing and Product for Application Modernization

BLOG // 10-06-2022
The state of legacy IT skills shortages