Certified Developers?
What does an Umbraco development agency actually do?
An Umbraco development agency builds, extends, and maintains websites on the Umbraco CMS, an open-source content management system built on Microsoft's ASP.NET Core framework. Unlike WordPress or Drupal, Umbraco has no plugin marketplace, every feature is custom-coded in C#, which means implementation quality depends entirely on the developer's expertise.
According to BuiltWith, Umbraco powers over 730,000 live websites globally, including organisations like Microsoft, the NHS, and Carlsberg. It consistently ranks among the top 10 .NET-based CMS platforms worldwide. G2's 2025 peer review data shows Umbraco outscoring WordPress, Sitecore, and Drupal for ease of customisation and developer satisfaction.
Simon Antony Limited is an Umbraco Silver Partner, one of fewer than 100 worldwide, led by Simon Steed, an Umbraco Certified Master with over 20 years of .NET development experience. We've delivered Umbraco solutions across every major version from v4 through v17, for organisations including the British Red Cross, Scottish NHS, and Vodafone.
Why choose an Umbraco specialist over a generalist agency?
Generalist agencies typically treat Umbraco as just another CMS. But Umbraco's architecture — custom C# controllers, Razor views, and a composition-based content model — requires deep platform knowledge to implement properly. A poorly architected Umbraco site is harder to rescue than a poorly built WordPress site because there are no plugins to fall back on.
Working with a certified Umbraco specialist means your project is built on proven architectural patterns from day one. Our builds consistently achieve Lighthouse performance scores above 90, with clients averaging a 40% improvement in Core Web Vitals within 30 days of launch. We handle the full stack: custom document types, API integrations, Azure deployment pipelines, Cloudflare edge configuration, and ongoing retainer support.
Every project gets direct access to the architect who designed it, there's no junior handoff after the sales call. That's the advantage of a senior-led, three-person team over a large agency.
Who has Simon Antony built Umbraco sites for?
Who has Simon Antony built Umbraco sites for?
Since 2008, we've delivered over 50 Umbraco projects across sectors including healthcare, charity, telecoms, recruitment, marine science, and professional services. Our client portfolio includes the British Red Cross first aid training platform, Scottish NHS iHub, Vodafone (via Yes Telecom infrastructure integration), and specialist firms like Translation People and Compliance Insider.
We operate as both a direct agency and a white-label development partner for other agencies who need certified Umbraco expertise without hiring in-house. Approximately 40% of our work comes through agency partnerships where we build the technical solution while the partner manages the client relationship.
Our project types range from greenfield Umbraco builds and complex legacy migrations to ongoing retainer support and performance rescue engagements. Most retainer clients have been with us for over three years, which we believe says more about our work than any sales pitch.
I worked with Simon and his colleagues during an extensive tender process to source a new telephone system and support services. Throughout this process Simon was extremely professional and courteous.
Paul Maddocks
Parkway Telecom Limited
My colleagues and I worked with Simon as our principal contact at YesTelecom; we found him to be great guy to work with - he 'got' what we were talking about instantly and always pulled the stops out to make sure we met mutual deadlines. I wouldnt have any hesitation what so ever of recommending him to anyone else and i look forward to working with him on other projects
Mike O'Shea
Director - TrackTek Ltd
I found Simon a great person to work with. His understanding of his business issues and how best to solve them with targeted IT services meant we were always able to provide the right solution for his requirements
Darron Edwards
Maindec Computer Solutions
Simon completed a contract with a key client, and throughout the process was a pleasure to work with. Both Simon's technical skills and personality will prove to be a great asset to any business either in a long-term permanent role or whilst providing consultancy services on an interim basis.
Andrew Maeer
CEO
Delivers an outstanding service, great work ethic and will always go that extra mile to get the job done!
Holly Wade
Softcat LTd
Worked with Simon for 2 years where he has always been clearly focused on delivering projects and IT improvements in a timely fashion. Good communicator within his peer group and able to see a rounded view of the business and long term goals
Andrew Tedder
Head of Customer Services - Yes Telecom (Vodafone company)
Your Website, in Safe Hands
Keeping your website running smoothly while focusing on your business can be overwhelming—we get it. That’s where we come in. Think of us as part of your team—handling the technical stuff so you don’t have to.
What can I expect?
Reliable support to keep your website secure and optimised
Regular updates, backups, and performance tweaks
Tailored plans designed to suit your needs
Priority care with limited availability
Please fill out the form below or contact us directly at hello@simonantony.co.uk
TESTIMONIALS
What do clients say about working with Simon Antony?
We've worked with organisations ranging from the British Red Cross and the Scottish NHS to specialist recruitment firms and marine science bodies. Our client relationships typically span multiple years. Most of our retainer clients have been with us for over three years, which we believe says more about our work than any sales pitch.
Client feedback consistently highlights three things: we communicate clearly without jargon, we deliver on time, and we're honest about what a project actually needs rather than upselling unnecessary work. As a small, senior-led team, every project gets direct access to the architect who built it, there's no junior handoff after the sales call.
We're happy to provide references and case studies on request. You can also see examples of our work in our portfolio.
I have no hesitation in recommending Simon as he is a hard working, experienced IT professional with excellent trouble shooting and resolving skills with regard to hardware, software and operator related computer problems when I worked with him at Yes Telecom He has good interpersonal skills and is able work with colleagues at all levels within an organisation and is prepared to go the extra mile to achieve his goals He would be an asset to any company in an IT consultant/engineering capacity
Mike Jones
Yes Telecom Ltd
I have worked with Simon on a number of occasions over the last couple of years, our dealings have always been pleasantly straightforward and highly productive, Simon is always able to convey his own requirements clearly, quickly understand the requirements of others and is always a pleasure to deal with on a personal level.
Lewis Williams
Delivers an outstanding service, great work ethic and will always go that extra mile to get the job done!
Holly Wade
Softcat LTd
I worked with Simon for 18 Months between Aug 2006 and Feb 2008 in this time I found Simon to be a friendly and approachable person. Simon had high standards and expected his colleagues to meet or exceed these standards. He was also especially good at asking the right questions so he was in possession of all the facts. Armed with these facts he was able to consistently push projects past the finishing post.
Steve Seacombe
I found Simon a great person to work with. His understanding of his business issues and how best to solve them with targeted IT services meant we were always able to provide the right solution for his requirements
Darron Edwards
Maindec Computer Solutions
Simon is a rare blend of technical expertise and strong managerial experience. Leading by example, Simon had detailed knowledge of every IT system within Yes Telecom, and is a very competent web / application developer. I would definitely recommend Simon for IT consultancy, development, or as part of the management of a suitable firm. Simon is a keen golfer, and a great photographer for private & professional events
Nemi George
Yes Telecom Ltd
Frequently asked questions about Umbraco development
Get answers to some of the most common questions about our services, expertise, and how we can help with your Umbraco projects.
