Legacy System Modernisation
We modernise outdated business software so it is maintainable, secure, and ready for the next decade. Where possible, your system keeps running while we work, and you see progress every sprint. When a system genuinely needs rebuilding, we'll tell you upfront and explain what that means for cost, timescale, and disruption. If you are still building the business case, read our guide to the true cost of a legacy system.
Common legacy problems we see.
The system works, but change has become expensive
It once handled your workflows, edge cases, and daily operations well. The business has moved on, but the system has stayed the same.
Small changes now take too long
Data is spread across systems, manual workarounds have multiplied, and even simple updates feel risky because the original knowledge has been lost.
Every option feels risky
Replacing the system could disrupt operations. Leaving it alone means rising costs, harder support, and a growing chance of downtime.
Technology is starting to limit the business
New services, partner integrations, and compliance changes take longer than they should because the system can no longer adapt.
Our approach to AI
We use AI to read your old system — not to write the new one.
AI helps us analyse source code, compiled programs, and even screen recordings — so we understand exactly how your business works before we build anything. Architectural and delivery decisions stay with senior engineers, and your code never leaves a secure pipeline.
What you actually have when we're done.
A system that is easier to run, easier to change, and safer to rely on — with the foundations of any modern application built in from the start.
A modern, maintainable codebase
Built on current frameworks and languages, with a structure competent developers can understand and work with. Easier to test, easier to extend, far less dependent on one person's memory.
Business logic preserved
Approval flows, reporting rules, pricing exceptions, user roles, validation logic, and process shortcuts are carried forward and validated against the original system's behaviour.
Lower operating costs
Older systems cost more than they appear to — support contracts, hosting inefficiencies, manual workarounds, slow release cycles. A modern platform, prepared for cloud where suitable, is usually cheaper to run and to change.
Reduced risk
Old dependencies, unsupported software, weak access controls, and patching gaps create avoidable exposure. Modernisation brings the application onto current infrastructure and supported components.
Capacity to change
New integrations, customer-facing improvements, analytics, and product changes stop being blocked by the legacy stack. Technology returns to its proper role — supporting growth rather than limiting it.
A proper application foundation
Every modernised application includes the basics: internationalisation, responsive design, authentication, a CI/CD pipeline, test data support, and demo data. Not extras — part of building software that can be maintained properly.
Ready to discuss your project?
A 30-minute call is enough to understand your situation and outline a realistic path.
What we modernise.
Application modernisation, legacy system migration, legacy database migration, and legacy to cloud migration — all under one roof, all with the same incremental approach. Don't worry if your system isn't listed below; the underlying challenge is rarely the brand name of the software.
Legacy ERP systems
Sage, SAP R/3, and custom-built planning or finance platforms.
Bespoke business applications
Access databases, Delphi, VB6, .NET WinForms, and classic ASP systems.
On-premise client-server systems
Older applications that need to move to the web or cloud.
Mainframe & AS/400
Long-running platforms still handling critical business processes.
Spreadsheet-driven processes
Operational processes where the business has outgrown Excel.
Legacy databases
FoxPro, Informix, older SQL Server environments, and older Oracle estates.
Data & database migration
Migration projects where history, accuracy, structure, and continuity all matter.
Integration & middleware layers
Fragile data flows between ageing systems with limited visibility.
If it's old and it needs modernising, we can assess it. The age of the architecture, the difficulty of change, and the operational risk attached matter far more than the name on the box.
reasons to choose us, and not someone else.
Large consultancies often bring overhead and price points that don't fit SMBs. Freelancers can be skilled, though key-person risk is high on systems this important.
Doing nothing keeps short-term disruption low — but the long-term cost and operational exposure usually keep growing.
Industries
Every sector has its own systems, constraints, and reasons why modernisation keeps getting delayed. We understand the specific technology landscape in each one.
Manufacturing
Legacy ERP & shop-floor modernisation with zero production downtime.
Explore Manufacturing →
Frequently asked questions
Honest answers to the questions decision-makers ask before committing to modernisation.
How long does a modernisation project take?
How much does it cost?
Do you always modernise incrementally, or do you sometimes rebuild from scratch?
What if we don't fully understand our current system?
Do you offer support after the modernisation is complete?
Can you modernise one part of the system first?
Why teams trust us.
100+ years
Combined team experience with legacy systems
20+ stacks
From COBOL and Delphi to .NET, React, and cloud-native
UK-based
Delivered by senior specialists
Secure AI use
AI support with human oversight and protected business data
Ready to modernise your legacy system?.
Book a free discovery call. We'll assess your current system, discuss your goals, and outline a realistic path forward — with fixed pricing and no obligation. Common starting points include Microsoft Access replacement options and a technology risk assessment.
Named systems
Common legacy systems we help assess and modernise
A modernisation programme usually starts on a specific named system. These are the systems we publish detailed pages on — each covering risks, hidden dependencies and decision options.