As400 Migration to AWS

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AS400 Cloud Migration

Move Off AS400 Without Losing the Business Logic That Runs Your Operations

Legacy AS400 systems have been powering organizations for over 30 years. However, a shrinking talent pool, rising maintenance costs, and technical isolation make migration unavoidable.

Corsac re-platforms your apps and Db2 for i data onto Azure or AWS — whichever fits your budget and compliance needs — running your legacy system in parallel until every workload is validated, then handing your team full documentation to run it independently.

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Signs It's Time to Migrate Your AS400 to the Cloud

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Your AS400 hardware ages every year, and replacement parts get harder to find

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Your organization struggles to hire RPG or COBOL developers who understand the system

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Your on-premises infrastructure costs climb every year with no path forward

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Your AS400 can’t connect to modern APIs, cloud tools, or analytics platforms

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Your business logic sits locked inside code that only a handful of people understand.

Real-World Case Studies

Since 2007, Corsac has helped 100+ clients across 7+ industries move beyond the limits of legacy systems. Our AS400 migration projects combine application and dependency analysis, cloud re-platforming, phased workload transfer, and rigorous validation to preserve critical business logic while moving operations to Azure or AWS.

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GIS – Resolving Locality Matching Challenges for Actionable Insights

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corsactech case stadies

Delivery Process Transformation for GIS Platform: From Ad-Hoc Support to Resilient Delivery Flow

Reduced hotfix release time by

70%

Achieved backlog visibility of

100%
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corsactech case stadies

Moving a PromptSmart Teleprompter Application from Old and Fragmented Native to a Holistic Multiplatform Solution

Reduced code duplication and raised development efficiency by

75%

Lower average time gap in cross-platform feature delivery by

80%
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Why AS400 Migration Is Critical for Digital Transformation

AS400 Cloud migration protects the logic your business runs on while removing the limits that come with aging infrastructure.

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    From the business perspective:

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    Cut rising maintenance costs tied to aging AS400 hardware and legacy licensing

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    Reduce dependency on a shrinking pool of RPG and COBOL specialists

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    Give leadership visibility into a system that runs like a black box today

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    Connect faster with modern partners, tools, CRMs and platforms

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    Protect decades of business logic before retiring staff take it with them

    From the tech perspective:

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    Migrate AS400 data to cloud-native databases without losing records

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    Apply continuous patching and managed security updates from the cloud provider

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    Build API layers that expose AS400 logic to modern systems, AI integrations, and advanced analytics

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    Support modern data pipelines that AS400 environments can’t handle natively

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    Document every application, data structure, and dependency for easier system maintenance

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    Scale compute and storage elastically instead of maintaining fixed on-premises capacity

Modernizing the past. 
Empowering the future.

Let us help you rebuild what’s holding you back.

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Core AS400 Migration Services

We provide end-to-end AS400 migration services for businesses in different niches. For regulated industries like healthcare and banking, we build HIPAA, SOC 2, and PCI DSS requirements into the migration plan from the assessment phase
Our experts lead you from planning to post-migration support with senior engineers accountable for every phase. We operate independently, minimizing interference, still making each change traceable and reversible.

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AS400 Migration Assessment & Strategy

Our experts go through your AS400 environment, apps, and Db2 for i database to find the hidden dependencies, undocumented logic, and compliance holes. You receive a roadmap with real numbers attached – cost, timeline, and risk – to make decisions and approve a budget based on actual data.

AS400 to Azure & AWS Migration

We re-platform your AS400 applications and Db2 for i data to run natively on Azure or AWS — converting RPG and COBOL logic into modern, cloud-native code instead of lifting the AS400 environment as-is.s. During the migration, we don’t shut down your legacy system until the full migration is complete. You can be sure your legacy environment fully moves to the right cloud, and so migration is designed not to interrupt your operations.

IBM i Application Modernization

Our developers modernize your RPG and COBOL applications to run on cloud infrastructure without rewriting business logic from scratch. Your organization keeps the operational knowledge built into these applications while removing the constraints of aging hardware and shrinking developer talent pools.

Db2 for i Database Migration

Our engineers migrate your Db2 for i database to Azure SQL Database or AWS RDS/Aurora and validate every record against the source. Your organization gets a database that supports modern analytics and integrates with cloud tools, without losing the accuracy of your original data.

AS400 API Integration & System Connectivity

Most AS400 business logic sits isolated from modern CRMs, reporting tools, and third-party integrations. Instead of rewriting the full application, we build an API layer on top of your existing application to make it compatible with modern business applications while cutting down the modernization costs.

Post-Migration Optimization & Managed Support

Once migration is done, our team stays on to watch performance, catch exceptions, and tune costs. We hand over documentation for every piece we migrated, so your own team can keep the system running and make changes without calling us every time something needs adjusting.

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What Makes Corsac a Trusted AS400 Migration Services Partner

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Modernization is our core specialization

We aren’t a full-stack agency. We’ve built our team, processes, and tech strategy specifically to tackle legacy issues and help mid-market players scale and innovate.

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Integration vs. Disruption

We integrate with your workflows, minimizing interference with your developers. While utilizing your Git, CI/CD, and tools, we operate independently, letting your team focus on their work.

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Identification of hidden expenditures

Your aging system drains your business resources through slow hiring, security gaps, and delayed launches. We reduce these “dark tech debt” losses before they impact your revenue.

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AI & Emerging Tech Enablement

We remove legacy barriers preparing your systems for advanced tech. You can embrace new tools with the future-ready and ROI-driven architecture.

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Fighting Tech Stagnation

Modernization efforts will be ineffective if the core issue is institutional rigidity. We reveal hidden limits and help grow with flexibility.

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Respect for Existing Architecture and Leadership

We treat your system efficiently: evolve the functioning parts and replace only the ones that require change.

Our AS400 Cloud Migration Process

Assessment & Cloud Migration Strategy

We begin with a careful assessment of your current system to identify what works and what slows you down. Our experts build a cloud modernization strategy, defining key priorities, approximate deadlines, and draft cost estimates.

Environment Preparation & Application Modernization

Corsac developers modernize your legacy RPG and COBOL applications and prepare your target cloud environment for migration. Our goal is to create a more flexible and scalable IT foundation for your business.

Data & Workload Migration

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Our engineers select the target cloud environment (Azure or AWS) based on your infrastructure, compliance requirements, and long-term technology strategy

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We run migration in stages, with the legacy and new systems running in parallel to avoid downtimes and business disruptions

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We sequence each phase by dependency order, so nothing moves before what it relies on is already in place

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We validate every batch against the source before it moves forward, checking record counts and data accuracy

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Your team gets visibility into every migration phase so you know exactly what has moved

Cloud Optimization & Ongoing Support

After migration, Corsac engineers monitor the system’s performance and optimize your cloud infrastructure for cost and speed. We deliver full documentation and knowledge so your team keeps control going forward.

Arrange a call now

Book an expert consultation to uncover gaps in your system. Let us modernize your business to its maximum potential.

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Industries

Healthcare
AEC and GIS
Sport
Banking & Financing
Charity and Non-profits
Cybersecurity
Speech Recognition

Software features we build and modernize:

  • Telemedicine and Remote Communication
  • Electronic Medical Documentation
  • Physical and Mental Health Monitoring
  • Child Development Tracking
  • Fall Detection and Movement Tracking
  • Hearing Assessment and Audio Testing
  • Relaxation and Emotional Support
  • Al-Powered Infection Diagnostics
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Software features we build and modernize:

  • Interactive Object Mapping
  • GNSS Equipment Integration
  • Utility and Infrastructure Mapping
  • Geospatial Data Management
  • Metadata and Interment Record Management
  • Advanced Project Management
  • Visual Analysis and Defect Detection
  • Social Monitoring and Service Mapping
  • Web and Mobile Access to Geospatial Data
  • Data Security and Access Control
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Software features we build and modernize:

  • AI-Based Motion Tracking
  • Ball and Equipment Tracking
  • Multi-Angle Camera Coordination
  • Performance Analytics and Heatmaps
  • Training Insights and Feedback
  • Integration with Wearables and External Devices
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Software features we build and modernize:

  • API Management & API Gateway
  • Microservices and Digital Transformation
  • Cloud Platform Integration
  • Security and Regulatory Compliance
  • Advanced Banking Domain Services
  • Analytics and Monitoring
  • Open Banking Solutions
  • Omnichannel Support
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Software features we build and modernize:

  • Project Discovery & Search
  • Donation Management
  • Organization & Project Profiles
  • Transparency, Reporting & Impact Metrics
  • Service Finder
  • Volunteer & Community Engagement
  • Grant & Funding Opportunities (For Non-governmental organisations)
  • Partner & Corporate Programs
  • Mobile Accessibility
  • Data Insights & Policy Recommendations
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Software features we build and modernize:

  • Security Operations Center (SOC) as a Service
  • Incident Response & Recovery
  • Cybersecurity Audits
  • Compliance & Certification Support
  • Security Trainings
  • Vulnerability Scanning & Penetration Testing
  • Endpoint, Network, and Cloud Security
  • Offensive AI Technology
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Software features we build and modernize:

  • Real-Time Voice-Tracking Engine
  • Adaptive Script Following
  • Offline Speech Recognition
  • Multilingual Voice Processing
  • Noise-Tolerant Recognition
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Corsac’s Experts

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Professional Tech Stagnation Breakers Fighting Tech Stagnation

We focus on modernization for companies unable to grow due to aging systems

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Evolving Existing Architecture and Leadership

We replace only what must be changed, protecting your investment and CTO’s credibility.

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Compliance From Commit to Production

HIPAA, HL7/FHIR, SOC2, GDPR, ISO compliance is integrated into every stage.

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Integration over Disruption

Integrating into your Git, CI/CD, and workflow tools, we make modernization visible, testable, and traceable

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Getting Rid of “Dark Tech Debt”

We uncover hidden costs, feature delays, and security gaps and offer ways of their removal

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Modernization that Fuels Leadership

By providing CEOs stakeholder-ready roadmaps and progress metrics, we enable well-grounded transformation

Most Outsourcing Vendors

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Focus on Delivery vs. Your Business Goals

They fulfill your task without seeking to address the issue at the root

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Lack Domain Expertise

Dispersing the focus, they fail to meet specific Healthcare G and other industry requirements

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Apply a Standardized Modernization Approach

Generalized practices, regardless of the product, team, or business specifics

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Disregard Your Existing Opportunities

Initiate full rewrites instead of using the working parts and considering business context

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Lack integration with your team

Insufficient collaboration leads to poor handover, with documentation debt and weak enablement.

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Code-First Mindset

Development happens in isolation, prioritizing code delivery over actual business value.

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We’d love to hear from you. Share your vision, and let’s explore how we can make it real together.

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    Our team will

    • 1 Process your request within 1-2 business days.
    • 2 Get back to you with an offer based on your project's scope and requirements.
    • 3 Set a call to discuss your future project in details and finalize the offer.
    • 4 Sign a contract with you to start working on your project.

    Corsac Technologies Corporation

    +1 416 505 4524 Toronto, Canada info@corsactech.com

    Frequently Asked Questions

    Yes. Corsac modernizes your existing RPG and COBOL applications to run on cloud infrastructure instead of forcing a full rewrite. During AS400 migration, we preserve the business logic your operations depend on and rebuild only what the target environment requires.

    Yes, your current system will stay operational during the migration. Modernization runs in phases. Your legacy AS400 environment runs in parallel with the new cloud environment until every workload passes validation. Your team keeps working in the existing system, maintaining it and releasing new features.

    The responsibility of picking the target cloud is on our engineers, not you. During the assessment phase, our developers analyze existing infrastructure, compliance requirements, and long-term technology strategy, and evaluate both platforms against your specific environment to recommend the option that matches your organization’s goals.

    During AS400 migration to Azure or AWS, our engineers reconcile every record against the source database after migration, checking for completeness, accuracy, and data integrity. We deliver a validation report before your legacy AS400 database is retired.

    Yes. Corsac delivers full documentation covering every migrated application, data structure, and system connection and passes the knowledge to your in-house developers. Your team has everything they need to maintain and extend the environment independently, and we offer post-migration support if you need it.