Exsite.dev

Advise

Maybe you've had an idea, maybe you want to try something out or just want a chat to understand if your idea is feasible or bonkers.

Alternatively, you know you need to build something but aren't sure how to organise your project or what technology to use. Exsite can advise on approaches and provide technical guidance on which services to use and how to architect your application.

Prototype

You might have an idea, but you're not a "techy". Exsite can create a prototype before you commit the time and money needed to build the real thing.

A prototype can take the form of sketches, a slideshow or a very basic version of your service. Prototyping tests your ideas and allows you to put something in front of users early. Your users become part of the process instead of having a new application dumped on them at the end that doesn't take advantage of their experience or meet their needs.

Build

You know what you want to build but need help building it. Exsite has experience developing solid, reliable services that work, backed by tests and monitoring tools that let you know your application needs attention before your users do.

Exsite will help you pick the best solution, whether that is a reputable cloud e-commerce platform or a bespoke service that can safely and securely serve your users.

Who are we?

This all sounds well and good but who are we? Exsite is a small consultancy based in the UK. We have experience building and running online services for a range of clients, from small startups to government departments and UK mobile telecom operators.

Exsite has been building web applications since the web started. The first was the very first travel website, built around 1995 for Thomson Holidays, and not long after that we built the first website for Hotel Chocolat.

In 2002/03 Exsite was involved in the development of the first 3G mobile messaging platform for Three UK and had the honour of sending the very first 3G email. Other notable work includes a prototype of a search-based Sky TV set-top box, built on a Raspberry Pi and demonstrated to the Sky board, which led to the development of search on all Sky set-top boxes.

More recent work has involved building services for government departments such as the Ministry of Justice, the Department for International Trade and other branches of UK government. This work has included public-facing services, internal tools and prototypes of future ideas.

Tools

For web-based applications Exsite uses a wide range of technologies on both the front end and back end, including React, Python, Node, PHP and Go. The technology is chosen according to the best tool for the job.

For mobile applications Exsite has experience building native iOS and Android applications. We have also worked with sensors and devices to help collect data and integrate it with mobile and cloud-based applications.

If you want to dip your toe into online sales, Exsite can help set up WooCommerce with payment gateways or look at alternatives such as Shopify.

Over the years we have been involved in researching, prototyping and demonstrating new technologies including mixed reality, the internet of things, sensor integration and TV applications. If you have an idea that you want to explore, please get in touch.

Helping out

At the Office of the Public Guardian Exsite built a service to track money spent by people acting on behalf of individuals who are unable to manage their own affairs, to protect them from fraud and exploitation.

At Barnardo's Exsite helped set up the digital transformation team to help the charity adopt new technologies and ways of working. During this time Exsite developed an online service for social workers to assess those at risk of Female Genital Mutilation (FGM).

Exsite also sponsors girls' and women's football to promote positive pathways into a career in sport, as well as the physical and mental benefits sport provides. Over the years Exsite has sponsored Bracknell AFC, Lily Woodham at Reading WFC and Hartland Girls Academy, where it funded match shirts, equipment and Veo cameras. For the 2026/27 season Exsite is sponsoring a player at Fleet Town FC.

If you are a charity or a not-for-profit trying to make the world a better place, Exsite will help for free where possible. Please get in touch to discuss your project.