Mainframe modernization services are most valuable for industries that rely on mission-critical systems, high transaction volumes, and strict performance or compliance requirements, including:

• Financial services (core banking, lending platforms, payments)
• Insurance (policy administration, claims processing systems)
• Healthcare (payer systems, eligibility and billing platforms)
• Manufacturing (ERP, supply chain, and production systems)
• Transportation and logistics (routing, scheduling, tracking platforms)

These organizations often depend on legacy COBOL, RPG, or mainframe-based systems that must evolve to support scalability, cloud integration, and modern user expectations. Modernization enables these systems to remain reliable while becoming more flexible, cost-efficient, and future-ready.

Yes. Keyhole Software offers a free mainframe modernization assessment designed for mid-sized and enterprise organizations evaluating modernization initiatives.

Our assessment includes:

• Evaluation of current systems, dependencies, and risks
• Identification of modernization opportunities and constraints
• Recommendations for rehosting, replatforming, refactoring, or rearchitecting
• A phased modernization roadmap with timeline and cost considerations
• Identification of where AI-assisted acceleration can deliver measurable value

This engagement helps organizations move forward with clarity, reduce risk, and align modernization efforts with business priorities.

Mainframe modernization timelines vary based on system size, complexity, and the chosen approach. Smaller initiatives may take a few months, while large enterprise transformations often span 12 to 24 months or more.

However, AI-assisted development and phased modernization strategies can significantly accelerate delivery.

• For example, in a recent engagement, Keyhole helped modernize a legacy system in approximately 5 months, compared to an initial estimate of 18–24 months, by combining AI-assisted development with architect-led execution and strong validation practices.

Timelines can be reduced without increasing risk when modernization is approached with the right balance of automation, governance, and experience.

There is no single “best” approach to COBOL modernization—it depends on your business goals, system complexity, and long-term strategy.

Common approaches include:

• Rehosting COBOL systems to modern infrastructure
• Refactoring code to improve maintainability
• Converting COBOL to Java or .NET
• Rearchitecting into microservices or cloud-native platforms

Most enterprise organizations use a hybrid approach, modernizing critical components first while maintaining system stability. Keyhole helps define the right strategy based on your specific environment, regulatory environment, and objectives.

AI can significantly accelerate many aspects of mainframe modernization, including code analysis, transformation, and test generation—but it is not a one-size-fits-all solution.

At Keyhole Software, AI is used as part of a governed, architect-led approach, where:

• AI accelerates repetitive and large-scale transformation tasks
• Experienced engineers validate outputs and ensure accuracy
• Critical business logic is preserved and fully tested
• Traceability is maintained from legacy code to modern systems

Some systems benefit more from AI acceleration than others, depending on complexity, code quality, and modernization goals. As part of our assessment process, we identify where AI can provide the most value, what business constraints govern AI use, and where traditional approaches are more appropriate.

Mainframe modernization projects are complex due to several common challenges:

• Limited or outdated system documentation
• Deeply embedded business logic
• Interdependencies between systems
• Risk of disrupting critical operations
• Shortage of experienced legacy system experts

These challenges can be mitigated through structured planning, AI-assisted analysis, and strong architectural oversight, ensuring modernization is controlled and predictable.

Yes. A well-planned modernization strategy minimizes disruption by using phased and parallel approaches.

At Keyhole Software, we reduce risk by:

• Modernizing systems incrementally rather than all at once
• Running legacy and modern systems in parallel during transition
• Validating functionality at each stage of the process
• Aligning releases with business cycles

This approach allows organizations to continue operating while modernization is underway.