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Expert legacy system support for your business-critical web applications

We specialise in supporting, hosting and modernising legacy systems that your organisation depends on. Reduce downtime, cut risk, and extend your application’s life with our UK-based ISO 27001-certified development team’s help.

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ISO

Cyber Essentials

Cloudflare

Crown Commercial Service

BIMA

Nominet

Outdated systems, mounting risk - but too critical to replace?

Many organisations still rely on legacy systems that perform vital functions — yet every year they become harder to maintain, more vulnerable, and less compatible with modern tools. You might be facing frequent downtime, rising maintenance costs, loss of in-house expertise, or vendor technologies that are no longer supported. Rebuilding from scratch feels risky and expensive — but doing nothing can be worse.

That’s where our legacy system support comes in. OWA can help you stabilise and extend the life of your existing software, ensuring security, reliability, and compliance without disrupting operations. Our UK-based developers and hosting team diagnose issues, implement performance improvements, and build a roadmap for modernisation at your pace.

With proactive monitoring, dedicated support, and a clear strategy, you can regain control of ageing systems and focus on running your business — not firefighting technical failures.

An OWA team member holding a USB stick in front of a server, highlighting the importance of legacy system support

Two OWA team members discussing legacy system support while standing in front of a computer screen displaying technical information

View of office space, designed for innovation while providing essential legacy system support for clients

500+

Projects Completed

30+

Years' Experience

250+

Happy Clients

100%

UK-Based Dev Team

Why organisations choose our legacy system support

Minimise downtime and disruption
Keep critical systems operational with proactive monitoring, fast response times, and preventative maintenance that stops issues before they become outages.
Extend system lifespan
Maximise ROI on existing software by stabilising and optimising legacy platforms — delaying costly rebuilds or replacements.
Strengthen security and compliance
Mitigate risk from outdated code or unsupported environments with regular patching, data protection, and compliance alignment.
Plan a path to modernisation
Get expert guidance to transition from maintenance to modernisation, with a clear roadmap that fits your budget and business priorities.

Trusted by leading UK organisations

Supported technologies

We develop and support using a variety of enterprise and open-source technologies including:

MySQL

Microsoft SQL Server

Oracle Database

PHP

Angular

Symfony

JavaScript

React

ASP.NET

HTML5

Get expert help with your legacy systems

Call, email or message us:

01865 717770

[email protected]

+44 7418 348957

Alternatively, please complete the short form below and a member of our support team will get back to you within one business day.

OWA have worked with the TUC for over 18 years… Their friendly and creative approach to complex technical issues and their ability to find solutions that are workable and affordable is a great help to our organisation.
Jay Sreedharan, Head of web and design, TUC

Still have questions? We’re here to help

What types of legacy systems and applications do you support?

We provide legacy systems and software support UK businesses rely on — including for applications created in ASP Classic, ColdFusion, Perl and JSP along with custom-built applications and those developed in outdated frameworks or current languages that a provider may have stopped supporting.

Can you support systems even if we don’t have original documentation or source code?

Yes. Our legacy systems and software support specialists regularly work with undocumented or partially documented code. Through careful analysis and reverse engineering, we rebuild missing knowledge, create new technical documentation, and ensure smooth legacy application support — even when source materials are incomplete or missing.

How do you ensure security and compliance for ageing systems?

Our legacy system support services include security patching (where possible), access control, and proactive monitoring for vulnerabilities common in older technologies. We follow UK data protection and compliance standards, ensuring our legacy systems and software support UK solutions protect sensitive data while keeping your operations fully auditable.

Can you help us modernise or migrate our legacy system in the future?

Absolutely. Alongside ongoing legacy application support UK, we help plan a clear modernisation roadmap. From stabilising your existing platforms to full migration, our legacy systems and software support team ensures a low-risk transition — allowing you to evolve at your own pace without losing operational stability.