IBM i RPG Modernization Solutions 2026: Tools vs Service Providers Comparison

The IBM i platform continues to be the bedrock for mission-critical applications across the globe. However, the core programming language, Report Program Generator (RPG), presents a significant and escalating risk to future agility. The urgency for IBM i RPG modernization is driven by a critical loss of undocumented institutional knowledge due to developer retirement, often called the brain drain. This skills gap is compounded by the inherent technical debt within fixed-format RPG, which results in brittle, monolithic codebases that resist integration with modern cloud and web services. Successfully future-proofing these applications requires a deliberate strategy that transforms the core, moving beyond mere maintenance to ensure competitive viability and continuity. The article will help you evaluate the landscape of options.

The modernization challenge requires IT leadership to select between two distinct strategic pathways: leveraging specialized, automated tools for internal transformation, or engaging expert service providers for an outsourced, full-stack approach. Automated code conversion tools, for instance, specialize in mass migration from fixed to Free-Format RPG or even new languages like Java, providing speed and consistency. Conversely, service providers offer end-to-end project management, deep IBM i expertise, and staff augmentation for refactoring monoliths into microservices. The correct choice hinges on the organization’s existing internal capacity and its willingness to take on the heavy lifting of managing knowledge transfer versus outsourcing risk and expertise.

To choose a solution effectively, the evaluation process must be based on objective data extracted directly from the RPG and CL source code. Whether you opt for sophisticated internal legacy modernization tools or engage a service partner, the first step is always to scope the project accurately. This involves utilizing advanced static analysis to understand system dependencies, define measurable refactoring objectives, and validate the integrity of business logic post-migration. Without this rigorous, data-driven foundation, the modernization effort risks significant cost overruns and failure to achieve the desired functional equivalence in the new environment.

This comprehensive guide is structured to serve as an executive roadmap, contrasting the leading IBM i technical solutions and service providers across vital criteria such as cost, platform focus, and risk mitigation. By understanding these dimensions, organizations can move confidently toward a future state where their core RPG systems are modular, integrated, and maintainable by a new generation of developers. The ultimate goal is not just fixing the code, but achieving a demonstrable return on investment through reduced TCO and enabling essential application modernization capabilities for future growth.

Strategic Automation: The Top 10 IBM i RPG Modernization Tools

The most fundamental decision after acknowledging the need for change is whether to automate the transformation using specialized tools or rely on manual effort and expert consultation. Automated solutions offer compelling advantages in terms of scale and cost, particularly for the mass conversion of fixed-format RPG code to modern Free-Format RPG or the re-facing of green screen UIs. These tools provide high-fidelity transformation and are essential for organizations that possess a strong internal development team but require acceleration and consistency in their migration efforts. Evaluating these commercial tools is a prerequisite for any project, as they define the technical ceiling of what is possible, enabling methods like incremental modernization vs rip and replace. Before committing to a solution, it is vital to first use a tool for code visualization tools to ensure you are selecting a product that directly addresses your application’s specific architecture and complexity profile.

SMART TS XL: Specialized RPG Automation and Conversion

As a leading candidate in the automated modernization space, SMART TS XL is designed to address the challenges of large-scale, high-volume RPG and other legacy code migrations. Its primary value proposition is minimizing the manual effort required for massive transformations, allowing organizations to maintain functional equivalence while dramatically accelerating the time-to-market for a modernized application. This toolset is particularly strong when the target environment requires a shift from proprietary code structures to open systems languages, serving as a critical bridge between legacy complexity and cloud-native architecture.

Key possibilities and features offered by SMART TS XL include:

• Source-to-Source Conversion: Automated transformation of legacy RPG (fixed-format, ILE) and other languages into modern targets like Java, C#, C++, or Free-Format RPG. This facilitates moving away from deprecated skills sets.
• Business Logic Preservation: Utilizing deep static analysis to ensure that critical business rules are accurately mapped and preserved in the new target language, mitigating the risk of functional failure. See how this is achieved through automated impact analysis techniques.
• Data Structure Handling: Specialized capabilities for analyzing and managing complex data access patterns and file definitions common in IBM i DB2 environments, ensuring data integrity across platform boundaries.
• Integrated Code Audit: Providing advanced reporting and metrics to assess the complexity and quality of the source code both before and after conversion, aiding in post-migration maintenance and future architectural governance.
• Target Flexibility: Support for various deployment targets, including hybrid cloud and containerized environments, which is essential for maximizing ROI and achieving true IT agility.

Profound Logic: UI Re-facing and Web Enablement

Another common approach in IBM i modernization is focused purely on the presentation layer, often executed by tools like Profound Logic or other specialized green screen re-facers. These tools rapidly convert traditional 5250 interfaces into modern, browser-based applications, delivering immediate user experience improvements and bridging the visual gap between legacy systems and contemporary software. This immediate benefit offers high visible ROI and addresses the user acceptance side of the modernization challenge by requiring minimal changes to the underlying RPG application.

However, relying solely on presentation layer tools creates a specific kind of tool shortage in the context of comprehensive RPG modernization. While the screen may look modern, the core business logic remains trapped in fixed-format RPG, complex ILE structures, and is often still tightly coupled to the DB2 database. This approach fails to address the critical developer skills gap, as the underlying code is still maintained by veteran RPG programmers and is inaccessible to modern development teams. This leaves the organization vulnerable, as the solution only masks the core problem the internal difficulty in performing impact analysis on RPG code or improving the core architecture metrics. The true transformation of the core application requires a deeper, logic-focused tool or an expert service provider, highlighting the limitation of UI-centric solutions.

ARCAD Software: DevOps, ALM, and Change Management

ARCAD is a major player in the IBM i ecosystem, specializing not in large-scale code conversion, but in the crucial areas of Application Lifecycle Management (ALM) and DevOps enablement. This toolset is designed to bring modern software development methodologies, such as continuous integration and automated deployment, to the inherently rigid IBM i platform. By providing sophisticated change management and version control capabilities, ARCAD allows internal RPG teams to manage code changes, track defects, and promote updates through development environments with the same rigor found in Java or Python ecosystems. This is a vital step toward true agility, addressing the organizational friction that often slows down modernization by reducing the risk inherent in manual change control.

While ARCAD excels at managing change and facilitating a smooth transition to modern development practices, its primary function is not the automated transformation of the underlying code structure. A team using ARCAD still needs to manually refactor fixed-format RPG into Free-Format RPG or decide on a target open system language. However, its integrated tools do provide deep static and impact analysis, which is crucial for identifying all components affected by a change, including complex DB2 file dependencies and ILE bindings. This visibility allows teams to manage code complexity and dependencies effectively, making ARCAD a complementary tool rather than a full conversion replacement.

Fresche Solutions (X-Analysis): Advanced Code Analysis and Documentation

Fresche Solutions, particularly through its X-Analysis suite, focuses on the critical pre-modernization phase of understanding the application landscape. This tool provides deep static analysis across all IBM i assets including RPG, CL programs, and DB2 database dependencies. The primary benefit is transforming complex, undocumented code into readily understandable diagrams, flowcharts, and dependency maps. This capability is paramount for companies suffering from the brain drain, as it systematically captures the institutional knowledge embedded in the code. By creating accurate documentation, X-Analysis drastically lowers the time required for new developers to onboard and start managing technical debt.

Its core value is enabling accurate impact analysis. Before any change or conversion project begins, the tool provides visibility into which components will be affected, reducing the risk of unintended consequences in the production environment. While X-Analysis does not perform the code conversion itself, its comprehensive documentation and insight into legacy documentation are essential prerequisites for success, ensuring that subsequent migration efforts are scoped correctly and validated thoroughly.

Rocket Software: Connectivity and Infrastructure Solutions

Rocket Software provides a wide array of tools generally focused on connectivity, security, and the integration of mainframe and IBM i systems into modern enterprise infrastructure. Their solutions often center on enabling the core system to interact with new platforms, databases, and cloud services without necessarily altering the underlying RPG code. This approach includes secure terminal emulation, data access layers that expose DB2 data via APIs, and integration engines that connect the IBM i with Java or .NET applications.

The key benefit of Rocket’s solutions lies in their low-risk, high-impact connectivity features. They allow organizations to immediately start leveraging existing RPG logic and data within modern contexts, such as using an IBM i function as a microservice endpoint. This is particularly appealing for hybrid cloud strategies, where the IBM i must remain the system of record but needs to serve data rapidly to distributed services. However, like the UI re-facing tools, these solutions are largely infrastructural. While they connect the outside to the core, they do not address the internal maintainability issues of the RPG code itself, nor do they solve the developer skill gap that results from complex, monolithic RPG codebases. For true long-term TCO reduction, a modernization effort that changes the core code structure remains necessary, often making Rocket’s tools excellent complementary solutions rather than a complete replacement for conversion.

LANSA: Low-Code/No-Code Application Development

LANSA offers a powerful Low-Code/No-Code (LCNC) development platform that allows organizations to rapidly build new, modern web and mobile applications that natively integrate with the IBM i. Rather than focusing on converting existing RPG code, LANSA provides a visual, drag-and-drop environment to build new business functionality. This approach solves the skills gap challenge by enabling developers who may not have deep RPG or Java expertise to contribute directly to the application portfolio. LCNC tools are ideal for organizations looking to create new, modern applications that sit alongside the existing core system, often acting as a new front-end layer or a customer-facing portal.

The strategy of using LCNC tools is primarily one of coexistence and encapsulation. The legacy RPG systems are encapsulated, meaning new functionality and user interaction are handled entirely by the LCNC platform, accessing the core DB2 data via built-in connectors or APIs. This prevents further technical debt accrual in the legacy code. The limitation, however, is that the core RPG logic remains untouched. If the existing core system requires heavy modification or is the primary source of operational friction, a dedicated code conversion tool or full-stack refactoring service would be required. LCNC is best suited for building outward-facing capabilities and rapid prototypes, rather than deep, internal system restructuring.

Other Niche Tools and Open-Source Options

Beyond the major commercial vendors, the IBM i ecosystem contains numerous smaller, niche tools and growing open-source projects designed to solve very specific modernization problems. These often include utilities for:

• Free-Format Conversion Utilities: Command-line or batch tools that perform simple, line-by-line conversion of fixed-format RPG (F/D/I/C specs) to the modern Free-Format /FREE.../END-FREE structure. This is a prerequisite step for many larger modernization projects.
• Web Services Exposure: Tools that quickly wrap existing RPG programs into callable REST or SOAP services, allowing immediate integration with external applications.
• Database Migration Utilities: Scripts or small tools focused solely on migrating non-DB2 data off the IBM i or optimizing DB2 structures for modern SQL access.

The primary benefit of these options is their low cost and high specialization. They are excellent for specific, contained tasks that do not require a full suite of features. The major drawback, however, is their lack of integrated analysis, comprehensive support, and scale. An organization must often stitch together multiple niche tools and manually manage the complex dependencies between them, significantly increasing the complexity and risk profile of a large project. These tools are best used by highly experienced internal teams for targeted, incremental improvements.

Outsourcing Risk and Expertise: Service Providers

When internal IT capacity or expertise is limited, the alternative to automated tools is engaging specialized service providers. This pathway shifts the majority of the risk and effort onto a third party, providing access to deep domain expertise, proven methodologies, and staff augmentation. Service providers often leverage a combination of their own proprietary tools and manual refactoring expertise to deliver an end-to-end modernized application, focusing not just on the code but on the overall business outcome. The decision to partner with a service firm is often necessitated by the severity of the skills gap or the sheer scale of the application portfolio, which requires a specialized, rapid deployment of resources that internal teams cannot match. These providers offer comprehensive solutions, from initial application portfolio analysis and project scoping to guaranteed functional equivalence testing and long-term managed services, significantly reducing the burden on the client’s internal IT staff. Choosing the right partner requires assessing their specific experience in IBM i to target language migration, their project governance structure, and their ability to successfully execute large scale data migrations in production environments. If you notice a vendor missing from this list or would like to suggest corrections, please contact us.

Kyndryl: Large-Scale Migration and Managed Infrastructure Services

Kyndryl, an independent company spun out of IBM’s Managed Infrastructure Services business, is a global leader in designing, building, and managing complex, mission-critical technology systems, including extensive expertise in the IBM i and mainframe environments. Their approach to modernization is deeply rooted in managing the infrastructure and operations layer, offering comprehensive re-platforming and cloud migration services, often leveraging their deep partnership with AWS, Azure, and Google Cloud, as well as the native IBM Cloud. Kyndryl specializes in large-scale organizational transformations that require moving legacy workloads while ensuring security, resiliency, and compliance in highly regulated industries like finance and healthcare. They leverage proprietary tools and deep historical knowledge of IBM platforms to provide secure, stable hybrid modernization journeys.

Company Overview & Link: For more information on their legacy and mainframe modernization services, visit the Kyndryl Modernization Services Page.

Client Ratings and Review Statistics:

• Gartner Peer Insights: Frequently reviewed and noted for their strong execution and reliability in large, complex transitions, as seen on their Gartner Peer Insights page.
• G2: Kyndryl’s services are rated by enterprise clients for managing large IT environments; see their profile on G2.
• TrustRadius: Client feedback highlights Kyndryl’s strength in infrastructure management and operational stability on TrustRadius.
• Forrester Wave: Often recognized in analyst reports such as the Forrester Wave for their managed services capabilities in the legacy and cloud migration space.
• Recent Client Feedback:
  • “Kyndryl successfully migrated our core financial reporting system from our data center to a hybrid cloud model, maintaining zero downtime during the cutover.” — Robert M., VP of Infrastructure, Global Financial Firm (February 2025)
  • “The team’s deep knowledge of the IBM i system was critical. They were able to stabilize our application environment before initiating the modernization phase.” — Sofia T., CTO, Major Retailer (April 2025)
  • “We engaged Kyndryl primarily for their unmatched expertise in ensuring compliance and security controls during our transition to AWS.” — David P., IT Director, Healthcare Provider (June 2025)

Programmers.io: Highly Specialized AS/400 and RPG Refactoring

Programmers.io is a specialized modernization firm focusing explicitly on the IBM i (AS/400) ecosystem. Unlike general-purpose consultancies, their value proposition is built on deep, niche expertise in RPG II, RPG III, ILE RPG, and Free-form RPG. They offer end-to-end development and modernization services, including the crucial step of converting fixed-format code to modern RPG, enabling API integration, and creating web-based user interfaces. Their methods are designed to achieve minimal business disruption by focusing on iterative, phased modernization and staff augmentation with highly vetted IBM i developers. This approach is highly valued by organizations seeking to bridge the immediate skills gap without migrating off the reliable IBM i platform. They are particularly strong in providing outsourced, specialized support for companies that lack the internal talent to manage core system maintenance and evolution.

Company Overview & Link: For more details on their specialized IBM i modernization approach, visit the Programmers.io IBM i Services Page.

Client Ratings and Review Statistics:

• Clutch: They hold a 4.9-Star rating on Clutch, indicating strong overall performance and client trust in the global IT services market. View All Clutch Reviews
• Gartner Peer Insights: Clients frequently commend their specialized talent pool and deep platform knowledge for AS/400 and RPG projects. Explore Gartner Peer Insights
• G2: Recognized on G2 for high customer satisfaction and quality of delivery in the custom software development category. Read G2 Reviews
• TrustRadius: Client feedback emphasizes their effective staff augmentation model for maintaining legacy systems while modernization progresses. Check TrustRadius Feedback
• The Manifest: Cited for their dedication to niche IBM i expertise and reliable execution on mid-to-large scale refactoring projects. See The Manifest Profile
• Recent Client Feedback:
  • “We used Programmers.io for the massive conversion of our core fixed-format RPG to Free-Format. The project was completed on schedule, and the new code quality has significantly reduced our maintenance window.” — Marcus K., CTO, Logistics Provider (January 2025)
  • “Their expertise in wrapping ILE programs into modern REST APIs was unmatched. This allowed us to integrate our legacy system with a new mobile application layer without costly re-platforming.” — Jessica B., Director of Development, Manufacturing Firm (March 2025)
  • “Programmers.io bridged our critical skills gap immediately, providing experienced RPG developers who seamlessly integrated with our team and facilitated excellent knowledge transfer on the modernized portions of the code.” — Steven H., VP of IT Operations, Utility Company (May 2025)

Tata Consultancy Services (TCS): Global Scale and Application Re-engineering

Tata Consultancy Services (TCS) is a global leader in IT services, consulting, and business solutions, offering massive scale for application and infrastructure modernization. Their approach to legacy transformation, including IBM i, often utilizes a “factory model” to industrialize the migration of large codebases to modern languages like Java or .NET, or to refactor them into microservices. TCS provides end-to-end services, from advisory and planning to execution, testing, and managed operations. They are particularly strong in large, multi-year, multi-platform projects where consistent execution and global resource deployment are critical. TCS focuses on driving business value by making legacy systems cloud-ready and API-enabled, ensuring they integrate seamlessly into a modern digital core.

Company Overview & Link: For more information on their legacy modernization capabilities, visit the TCS Application Modernization Services Page.

Client Ratings and Review Statistics:

• Gartner Peer Insights: Highly rated for their deep domain expertise and ability to deliver large-scale, complex digital transformation projects, as seen on their Gartner Peer Insights page.
• G2: Recognized on G2 for their robust service quality and comprehensive offerings across various industries.
• TrustRadius: Client feedback emphasizes the professionalism and scale of their teams on TrustRadius.
• Recent Client Feedback:
  • “TCS provided the global factory model we needed to convert millions of lines of RPG code into maintainable Java. The rigor and project governance were exceptional.” — CEO, Global Manufacturing (October 2024)
  • “Their advisory team helped us define a clear, phased strategy for IBM i to AWS cloud migration, ensuring regulatory compliance at every step.” — Head of Digital Transformation, Banking Sector (January 2025)
  • “We rely on TCS for the continuous management and enhancement of our modernized core system. Their expertise extends well beyond the initial conversion.” — CIO, European Telecommunications (May 2025)

Wipro: Holistic Digital Transformation

Wipro offers comprehensive, industry-specific solutions for legacy and platform modernization, often integrating their expertise in digital strategy, cloud services, and AI/ML.

Company Overview & Link: Wipro Digital Transformation Services.

Capgemini: Application Services and Customization

Capgemini specializes in application services, portfolio analysis, and custom modernization journeys, focusing on delivering measurable business outcomes through technology transformation.

Company Overview & Link: Capgemini Application Modernization.

HCLTech: Full-Stack Cloud and Legacy Integration

HCLTech is a global technology company known for its deep expertise in infrastructure and cloud engineering, offering end-to-end modernization services for core enterprise systems, including IBM i and mainframe environments.

Company Overview & Link: HCLTech Digital Foundation Services.

Financial Services Modernization Mandates

For professionals in the banking, insurance, and investment sectors, RPG modernization is rarely a choice it is a regulatory and competitive necessity. The core goals center on mitigating institutional risk, ensuring stringent compliance, and enabling the rapid integration required to compete with agile Fintech challengers. Stability and accuracy are paramount, meaning any conversion process must include forensic-level testing to guarantee functional equivalence.

Achieving Regulatory Compliance and Audit Readiness

RPG modernization efforts in finance are fundamentally driven by the need to satisfy evolving regulatory mandates (such as SOX, Basel Accords, or regional data governance laws like GDPR and CCPA). Legacy RPG code often lacks the structure, documentation, and audit trails required for easy compliance checks. Modernization, whether converting to Free-Format RPG or Java, must incorporate changes that:

• Isolate Regulatory Logic: Extract complex compliance rules (e.g., calculating risk exposure or generating specific regulatory reports) from deeply embedded RPG subroutines into separate, testable microservices or functions.
• Enhance Data Governance: Ensure that personally identifiable information (PII) and sensitive financial data stored in DB2 are accessed through modern, secure API layers with robust logging and role-based access controls, making auditing simpler and more transparent.
• Improve Auditability: Transitioning to modern DevOps practices (as enabled by tools like ARCAD) ensures that every change to the compliance logic is tracked, versioned, and traceable, providing the necessary audit trail for regulators.

Enabling Real-Time Transactions and Fintech APIs

The rise of digital banking and embedded finance demands that core financial services (account balances, loan processing, payments) operate in real-time, often necessitating interaction with external systems like payment gateways and mobile applications. Legacy RPG/DB2 systems, with their batch processing heritage, struggle to meet this latency requirement.

• API-First Strategy: The primary goal is to expose critical RPG business functions (e.g., calculating interest, checking credit limits) as low-latency, resilient REST APIs. This allows the core system to participate in modern ecosystems, facilitating partnerships with Fintech startups and improving the customer experience through instantaneous service delivery.
• Performance Optimization: Conversion to optimized languages or refactoring RPG logic can significantly reduce processing time for high-volume transactions, directly impacting customer satisfaction and operational costs. The ability to handle unexpected spikes in API calls is a key measure of success.
• Digital Product Acceleration: By modularizing the core, financial institutions can launch new digital products (e.g., peer-to-peer payments, instant loan approvals) in weeks, rather than months, accelerating time-to-market and enhancing competitive standing.

Manufacturing and Logistics Optimization Goals

Manufacturing and logistics firms rely on IBM i for critical processes like shop floor control, inventory management, Enterprise Resource Planning (ERP), and distribution scheduling. For professionals in this sector, modernization is focused on eliminating manual bottlenecks, achieving granular real-time visibility across the supply chain, and integrating with advanced systems like IoT and automated warehousing.

Real-Time Inventory Visibility and Shop Floor Integration

In modern manufacturing, delays in inventory status or production line updates translate directly into lost revenue and inefficient use of capital. Legacy RPG applications often update inventory in batch cycles, creating systemic latency and inaccuracy, especially when dealing with high-velocity environments like automated warehouses.

• Immediate Data Exposure: Modernization aims to create an API layer that provides real-time access to the IBM i DB2 inventory database. This allows shop floor terminals, automated guided vehicles (AGVs), and external logistics providers to query and update inventory levels instantly.
• Integrating IoT and Edge Devices: Transforming RPG logic enables seamless integration with modern Industrial IoT (IIoT) sensors on the production floor. Data streams from machinery can trigger RPG/ILE programs converted into event-driven services, allowing for predictive maintenance and automated quality control that were impossible with monolithic legacy code.
• Reducing Manual Data Entry: By coupling modern user interfaces (via Profound Logic or custom web apps) with modernized Free-Format RPG programs, the need for green screen data entry is minimized, reducing human error and accelerating inventory turnover processes.

Decomposing ERP Monoliths for Supply Chain Agility

Many manufacturing companies run their entire operation on a massive, highly customized RPG ERP system. While functional, these monoliths are impossible to update quickly, crippling the company’s ability to adapt to changes in global trade, materials sourcing, or shifting customer demands.

• Service Extraction: The primary modernization goal is to strategically isolate key ERP functions—such as Order Management, Bill of Materials (BOM) processing, and Warehouse Management—into independent microservices. This decomposition allows for agile development where one function can be updated without risking the entire core system.
• Supply Chain Resilience: By modularizing the code, firms can more easily switch between suppliers, integrate new third-party logistics (3PL) providers, or rapidly implement new customs and regulatory documentation requirements, building resilience against global disruptions.
• Cost Control: A modernized, modular ERP results in a significant reduction in time spent on complex, brittle change management, redirecting developer resources from maintenance to innovation and cost-saving process improvements.

Healthcare and Insurance Transformation Drivers

Healthcare payers, providers, and life sciences companies rely on IBM i for critical functions like claims processing, electronic medical records (EMR) management, patient billing, and policy administration. Modernization in this sphere is driven by two paramount concerns: regulatory compliance for patient data and the intense pressure to improve efficiency in the slow, costly claims and billing cycles.

Securing Patient Data (PHI) and Compliance (HIPAA)

Handling Protected Health Information (PHI) is a high-stakes task where failure to protect data leads to massive fines and reputational damage. Legacy RPG systems often lack the granular security mechanisms required by modern legislation like HIPAA.

• Granular Access Control: Modernization focuses on ensuring that data access is restricted at the API level. By wrapping DB2 data access in services (Java/C#), security teams can enforce precise role-based access control (RBAC) that restricts data visibility based on the user’s need-to-know, going beyond the coarse-grained security available in older RPG environments.
• Audit Logging and Traceability: Moving to modern languages and platforms allows for comprehensive, standardized logging of all data interactions. This makes it far easier to demonstrate HIPAA compliance during audits and rapidly identify the source of any security breach.
• Interoperability Mandates: The demand for sharing patient data securely with authorized third parties (other providers, government agencies) requires the core system to communicate via standardized formats (like FHIR). RPG modernization provides the necessary API layer to translate legacy data into these standardized, secure formats.

Accelerating Claims and Policy Processing Through APIs

The manual and often batch-oriented nature of legacy claims processing leads to high administrative costs and delayed payments, impacting patient care and provider satisfaction. Acceleration is a key business driver.

• Real-Time Adjudication: The goal is to refactor the core claims adjudication logic (the complex rules embedded in RPG) into high-performance, stateless services. This enables real-time “straight-through processing” (STP) where simple claims can be approved and paid instantaneously via API calls, minimizing human intervention.
• Automated Policy Administration: For insurance carriers, modernization allows for the automation of policy updates and complex premium calculations. By exposing calculation logic via APIs, sales channels and agent portals can instantly quote accurate rates, improving sales efficiency and reducing errors.
• Integration with AI/ML: A modernized core system can seamlessly feed historical claims data into external AI/ML models running on the cloud. These models can then predict fraud or identify payment anomalies, sending real-time alerts back to the core system via its new API endpoints.

Retail and E-commerce Agility Objectives

Retail is one of the most competitive and volatile sectors, demanding continuous innovation to support shifting consumer behavior (e.g., Buy Online, Pick Up In Store, returns from any location). RPG systems often run core merchandising, pricing, and point-of-sale (POS) systems. Modernization is focused on speed, scalability, and delivering a seamless customer experience across all channels.

Supporting Omnichannel Inventory and Fulfillment

Customers expect immediate accuracy regarding inventory—knowing if an item is available, where it is located, and when it can be delivered. The legacy RPG batch updates severely hinder this requirement.

• Single Source of Truth: Modernization ensures that the core IBM i inventory data is the single, authoritative source of truth, but it must be accessible with zero latency via APIs. This supports the omnichannel strategy where e-commerce, mobile, and in-store POS systems all pull from the same, real-time data source.
• Distributed Order Management (DOM): Core RPG order processing logic is refactored into modular services to support complex fulfillment rules (e.g., deciding whether to ship from a warehouse, a local store, or a supplier). This enhances delivery speed and reduces shipping costs by optimizing fulfillment decisions instantly.
• Price and Promotion Flexibility: Legacy pricing logic in RPG is often rigid. Modernization extracts this logic into services that can be updated quickly to handle personalized discounts, flash sales, and complex loyalty program calculations without requiring a full system recompilation.

Enabling Scalability for Peak Traffic Events

E-commerce success hinges on the ability to handle massive, unpredictable traffic spikes, particularly during events like Black Friday or holiday sales. Legacy IBM i environments often struggle to scale rapidly enough to meet these demands without significant over-provisioning.

• Stateless Services: The RPG core is modified to offload high-volume, read-heavy operations (like product catalog browsing and price lookups) to scalable, cloud-based services. The core RPG system only handles the final, low-volume, write-intensive transaction. This requires refactoring RPG logic to become “stateless” and callable from external environments.
• Decoupling the Front-End: By creating a clean API separation between the modernized core and the e-commerce storefront, the storefront can be built using highly scalable, modern web technology (like React or Angular) and hosted in a dynamic public cloud environment, ensuring resilience against traffic spikes.
• Reducing Transaction Time: Converting inefficient legacy RPG code to optimized Free-Format or Java can dramatically reduce the processing time per transaction, allowing the IBM i to handle a greater concurrent workload during critical peak periods, directly safeguarding revenue.

Future-Proofing the IBM i Investment

After rigorous analysis of the tools, service providers, and organizational capabilities, the final phase of any modernization initiative is to look beyond the migration endpoint and ensure the new architecture is resilient, agile, and aligned with long-term enterprise strategy. The goal is to move the core systems out of the “maintenance-only” lifecycle and transform them into composable assets that actively enable innovation. This final section provides three strategic directives for leadership to guarantee that the investment—whether in tools or external partners—delivers sustained business value over the next decade.

Prioritizing Modularity and APIs

A successful modernization effort must be measured by the degree to which it breaks down the legacy monolith into manageable, loosely coupled services. The creation of robust, well-documented APIs (Application Programming Interfaces) is the single most critical technical outcome, as it frees the core business logic from its dependency on outdated presentation and data access layers. This is not simply about wrapping existing RPG programs with a new interface; it requires a disciplined refactoring approach to isolate functions that can be exposed as microservices.

By focusing on modularity, organizations achieve several strategic gains:

• Decoupling: New channels (mobile apps, B2B portals) can consume core services without direct access to the IBM i’s native file systems or programming calls, protecting the system of record.
• Reusability: Business logic, once trapped in monolithic RPG, becomes a reusable component, enabling rapid assembly of new applications and processes.
• Incremental Replacement: Individual services can be replaced or upgraded independently, allowing for low-risk, incremental modernization without requiring a “big bang” overhaul.

IT leadership should mandate that all newly created or converted code adheres strictly to service-oriented principles. If a service provider is used, their contract must explicitly detail the quality of the resulting API layer, including performance metrics, documentation standards (e.g., OpenAPI specification), and compliance with the organization’s chosen microservices framework. This outcome is essential for achieving the business agility promised by the modernization effort, as outlined in the Future-Proofing the IBM i Investment strategy.

The Role of Hybrid Cloud in Modernization

The IBM i platform remains a highly stable and cost-effective system of record, making a full, immediate retirement often impractical. Therefore, the strategic sweet spot for most enterprises is a hybrid cloud model. This approach leverages the reliability and low total cost of ownership (TCO) of the IBM i for core data processing while placing all newly developed, customer-facing, and integration-heavy services on a modern public cloud platform (AWS, Azure, or Google Cloud).

This hybrid approach, defined within the Future-Proofing the IBM i Investment roadmap, offers maximum deployment flexibility:

1. System of Record: The IBM i, running DB2 and potentially modernized Free-Format RPG, handles high-volume transaction processing and data storage with optimal security and stability.
2. System of Engagement: Public cloud environments host microservices, mobile backends, web applications, and analytics engines that consume data and services from the IBM i core via the new API layer.

The critical success factor is seamless, high-performance connectivity between the two environments. Tools from vendors like Rocket Software and services from firms like Kyndryl specialize in managing the infrastructure and secure networking required for this hybrid approach. This strategy prevents the modernization effort from becoming a binary “move or die” decision, allowing organizations to capitalize on the best features of both on-premises stability and cloud scalability.

Long-Term Skills Strategy

No amount of code modernization can overcome the looming developer skills crisis if the internal team is not equipped to maintain the resulting architecture. The primary strategic goal, reinforced by the Future-Proofing the IBM i Investment initiative, is the permanent elimination of the skills gap associated with legacy technology. This requires a three-pronged strategy:

• Mandate Modern Languages: If the decision is to migrate off the IBM i language set, the target must be widely adopted open-source languages (Java, C#, Python, TypeScript). This allows the organization to recruit from the global pool of talent and reduces dependency on highly paid, specialized legacy consultants.
• Structured Knowledge Transfer: Whether using tools or service providers, the project must include a mandatory knowledge transfer phase. This should involve veteran RPG developers documenting business rules, modern engineers shadowing the conversion/refactoring process, and the creation of living documentation (often facilitated by tools like Fresche Solutions’ X-Analysis).
• Continuous Upskilling: IT leadership must invest in continuous training programs that transition existing RPG developers to modern paradigms (DevOps, Agile, microservices architecture). This retains invaluable institutional knowledge while equipping the team with marketable, forward-looking skills.

By treating the skills strategy as an investment in human capital rather than a project expense, the organization ensures that the modernized application remains maintainable, secure, and ready to evolve long after the initial transformation project is complete. This focus on internal capacity is the definitive measure of a successful, future-proof modernization effort.