Retail
Retailers run on systems built for a different era mainframes, and IBM i systems that hold inventory truth, pricing logic, and order history. The challenge is not replacing them. It is getting real-time data and services out of them before your competitors do.
Retail moves fast — but the systems that hold inventory, pricing, order, and customer data often do not. The pressure to deliver real-time omnichannel experiences, handle peak trading periods, and feed AI-driven personalization is real. The bottleneck is usually not ambition. It is the gap between what the legacy system holds and how quickly modern services can access it.
Expose inventory data from legacy ERP and IBM i systems as real-time APIs — so e-commerce, mobile, in-store, and fulfilment channels all work from a single, live source of truth. Eliminate overselling and buffer stock caused by batch-updated inventory feeds.
Legacy systems running batch-based inventory and order processes cannot support sub-second response times during peak trading. OpenLegacy generates cloud-native services from legacy back-ends that can scale elastically with demand — without requiring changes to the core system.
Loyalty programs and AI personalization engines need real-time access to purchase history, customer profiles, and inventory data locked in legacy systems. OpenLegacy provides that connection with lower latency than traditional middleware, enabling AI-driven recommendations and real-time loyalty status.
Inventory and logistics data siloed in legacy ERPs cannot support real-time supply chain decisions. OpenLegacy connects supply chain platforms and analytics tools directly to legacy data sources — providing the real-time visibility needed to respond to demand shifts and reduce out-of-stock events.
Connecting modern cloud applications to existing ERP systems through custom middleware is slow, fragile, and expensive to maintain. OpenLegacy generates standards-based APIs directly from ERP and SAP data structures — enabling faster integration without bespoke connector development or middleware overhead.
Legacy POS systems that depend on batch synchronization cannot support modern in-store experiences. OpenLegacy enables a phased POS modernization approach — exposing POS data and functions as APIs and progressively shifting workloads to cloud-native services without a disruptive cutover.
Faster Time-To-Market
Deliver new digital commerce capabilities faster by connecting directly to legacy inventory, ERP, and order systems — without changing the systems underneath.
Cost Reduction
Reduce integration development effort through automation and direct connectivity — eliminating the custom middleware builds that slow every digital initiative.
Big Bang Rewrites
Safely bridge legacy ERP speed and real-time digital commerce needs. Legacy and cloud run in parallel — workloads shift in controlled phases at your pace.
These are the retail modernization initiatives where legacy systems create the most friction — and where OpenLegacy removes it without disrupting the operations that keep the business running.
External + Data Layer Decoupling
E-commerce, mobile, in-store, and third-party fulfilment channels all need to work from the same, live inventory position. But inventory truth lives in legacy ERP and IBM i systems that were built for batch processing — not sub-second API responses. OpenLegacy generates real-time APIs directly from these legacy inventory systems, providing all channels with a single, consistent source of stock truth. Overselling risk is eliminated, buffer stock is reduced, and fulfilment accuracy improves across every channel.
Real-TimeInventory Accuracy
No OversellingAcross Channels
External Decoupling
Black Friday, Cyber Monday, and other peak trading events expose the limits of legacy batch systems. E-commerce platforms need sub-second response times for availability checks and order placement — and the systems that hold that data need to scale elastically with demand. OpenLegacy generates cloud-native services from legacy inventory and order back-ends that can be deployed on cloud infrastructure and scaled independently of the core system, without requiring the core to be changed or re-architected.
Sub-SecondAPI Response
ElasticPeak Scaling
Data Layer Decoupling
Loyalty programs and AI recommendation engines need real-time access to purchase history, customer profiles, and live inventory data. This data is often stored in legacy systems and is only accessible via batch exports or slow middleware integrations. OpenLegacy connects AI and personalization platforms directly to legacy data sources with the low latency that real-time recommendations require — enabling loyalty point calculations, personalized offers, and next-best-action prompts to respond to what the customer is doing now, not what they did yesterday.
Real-TimeCustomer Data
ContextualPersonalized Offers
External + Data Layer Decoupling
Supply chain visibility platforms, demand forecasting tools, and logistics systems all need consistent, real-time access to inventory and order data held in legacy ERP and IBM i environments. Custom connector builds are slow, fragile, and expensive to maintain. OpenLegacy generates standards-based APIs directly from ERP and SAP data structures — including IBM i and mainframe-hosted instances — enabling supply chain platforms to access the data they need without bespoke integration work and without changing the core ERP.
API AccessERP & SAP Data
FasterPartner Onboarding
Internal + External Decoupling
Legacy POS systems that depend on nightly batch synchronization to the back office cannot support modern in-store experiences — mobile checkout, clienteling tools, real-time loyalty redemption, or unified cart across channels. OpenLegacy enables a phased POS modernization approach: exposing POS data and functions as APIs first, progressively shifting in-store workloads to cloud-native services, and enabling digital twin patterns where IoT and in-store sensors can reference real-time legacy inventory data — all without a disruptive POS replacement program.
PhasedPOS Modernization
No DisruptionCloud Transition
Your ERP, IBM i, and legacy inventory systems do not need to be replaced to power modern retail experiences. OpenLegacy connects directly to these systems and generates cloud-ready APIs and services from what already exists. Digital and legacy run in parallel — you choose the pace.
Legacy and Cloud run in parallel. Workloads shift in waves. The core stays stable throughout.
Create a new API layer — without touching the core. Expose existing inventory, order, pricing, and customer data from legacy ERP and IBM i systems as modern APIs. E-commerce platforms, mobile apps, supply chain tools, and AI services consume these APIs while the legacy system remains the system of record. This is the fastest path to real-time omnichannel inventory, loyalty integration, and ESB retirement.
Selectively modernize modules — while keeping the whole system running. Identify and isolate specific business functions — an inventory availability check, an order pricing calculation, a loyalty points engine — so they can be exposed, decoupled, and progressively modernized while the existing system keeps running. New cloud-native functionality deploys alongside the legacy system, reducing risk and allowing the modernization to progress in waves aligned to business priorities.
Unlock legacy data for AI, analytics, and real-time services. Make data from legacy databases and ERP systems available to cloud data stores, streaming layers, and AI platforms without schema changes or middleware overhead. AI personalization engines, demand forecasting tools, supply chain analytics, and IoT systems gain timely access to the inventory, order, and customer data they need from legacy sources of truth.
01Analyze
Securely connect to IBM i, ERP, mainframe, or legacy system. Visualize dependencies, data structures, and integration points to identify the safest decoupling opportunities before any changes are made.
02Plan
Map your modernization plan. AI-powered automation identifies the APIs and services needed to support the target retail architecture and builds the service blueprint — without manual reverse-engineering or specialist legacy skills.
03Execute
Auto-generate the services identified in the plan. Deploy to cloud, on-premises, or hybrid environments. Iterate continuously — each wave builds on the last and delivers business value without waiting for a full program to complete.
Retailers and consumer-facing enterprises across Europe and the Americas use OpenLegacy to connect their legacy systems to modern digital platforms — delivering real-time data, faster catalog updates, and seamless supplier integration without replacing the core systems their operations depend on.
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ExploreOpenLegacy integrates into modern cloud environments and works alongside the platforms retailers already rely on. Whether you are connecting a cloud-native e-commerce platform to a legacy IBM i inventory system, integrating AI personalization with ERP data, or bridging IoT in-store sensors to back-office stock records — OpenLegacy fits into your architecture and delivery model without replacing the systems you depend on.
It complements modernization programs led by cloud providers and systems integrators, fitting alongside existing ERP migration and cloud adoption programs rather than competing with them.
See how OpenLegacy generates real-time inventory APIs from legacy ERP and IBM i systems — enabling a 200% revenue growth by optimizing control over essential information, leading to improved decision-making and market responsiveness.
Read the BriefExternal, Internal, and Data Layer decoupling — three proven approaches to connecting legacy ERP, IBM i, and inventory systems to modern cloud environments. See how each pattern applies in a retail and commerce context.
Explore MoreSee how leading organizations have used OpenLegacy to bridge legacy back-office systems with modern digital channels — delivering real-time inventory, faster integrations, and scalable cloud adoption without a core system replacement.
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