Top 100 Software Development Companies in the United Kingdom

Flat Rock Technology is a development agency headquartered in London, with an office in Varna, Bulgaria. Since 2008, their team of 88 has been specializing in custom software development, mobile app development, UX/UI design, and more for mainly midmarket-size clients. They primarily serve clients in the IT, consumer products & services and media industries. 

InStandart, a custom software development firm and e-commerce development firm, is located in Kherson, Ukraine. The small company was launched in 2014. Their services include custom software development and e-commerce development.

Hex Digital, an advertising company, is headquartered in London, United Kingdom. The small company was launched in 2008. Their services include advertising, custom software development, ux/ui design, branding, and more.

Transputec, a midsize cybersecurity company, is located in Wembley, United Kingdom. They focus on cybersecurity, IT managed services, and custom software development and were launched in 1984.

Founded in 2017, Lambert Labs is a software development agency that specializes in Python. Their team of fewer than 10 employees is based in London. They also provide web development services and application testing. 

CyBearSoft is a software development firm. Established in 2021, the small agency is in London, United Kingdom. Their team specializes in custom software development, web development, and mobile app development.

One Beyond is a bespoke software development and digital transformation company headquartered in London with additional engineering centers in Madrid (Spain), Budapest & Szeged (Hungary) and Bucharest (Romania). Across international locations, they have a team of more than 350 individuals providing custom software, web and mobile application development and large- scale digital transformation to a diverse clientele.They support large established businesses, nonprofits, government organizations, and VC-funded startups

Powercode is a web development agency based in Kyiv, Ukraine founded in 2015. They are operated by a team of 66 who are experts in web, mobile app, and custom software development for clients ranging from startups to enterprises. They have experience working in industries such as financial services, business services, and IT. They are also familiar with working with platforms like Amazon, Linux servers, and Azure, among others.

This is Undefined, a branding firm, is located in London, United Kingdom. The small company was founded in 2018. Their team offers branding, digital strategy, ux/ui design, mobile app development, and more.

Founded in 2005, PGS Software is an IT solutions company based in Wroclaw, Poland. They provide development and consulting services to businesses of all sizes from a variety of industries. 

Looming Tech, an app development company, is located in Sofia, Bulgaria and London, United Kingdom. The agency offers mobile app development, web development, custom software development, e-commerce development, and more and has a small team.The agency was founded in 2020.

Thoughtbot is a web and mobile app development company based in Boston, MA with offices in Austin, San Francisco, New York, Raleigh, Washington D.C, and London. Since 2003, this 50+ team has delivered empowering digital solutions to enterprise-level and small companies alike.

3 SIDED CUBE is an accredited app development and digital product agency headquartered in Bournemouth, England with additional locations in London, Chicago, and Washington, DC. Since their ambitious beginning in 2009, the team of about 38 has collaborated with startups and international organizations, reaching over 87 countries and more than 100 million global downloads. In addition to mobile app development, they also provide UX/UI design services to inspirational organizations.

Founded in 2004, HeadChannel is a software development firm that offers custom software development, web development, and mobile app development services to their small business and mid-market clients in the IT industry. Their 50 employees are based out of offices in London and Katowice, Poland.

Automation Squared Ltd is an app development company based in Horsham, England, with offices in Croydon, England; Brighton, England; and Pittsburgh. The 13-person team got started in 2007 and offers mobile app development, AI development, and enterprise app modernization.

Applifting is a software studio based in Prague. Since 2014, their team of 70+ has been specializing in custom software development, digital strategy, and UX/UI design. 

Established in 2011, Aron Web Solutions is a development agency that specializes in e-commerce development, web development, and SEO. Located in Mohali, India, they work primarily with small businesses in the retail industry.

Takeaway Reality is an AR/VR development company headquartered in London, United Kingdom. The small firm was established in 2020. Their team offers AR/VR development, marketing strategy, mobile & app marketing, and business consulting.

Readysalted Design Ltd, a web design agency, was founded in 2003. They are headquartered in Newcastle upon Tyne, United Kingdom and have a small team. Their services include web design, web development, mobile app development, print design, and more.

Ray Solutions Ltd is an IT staff augmentation company. They specialize in IT staff augmentation, custom software development, Artificial Intelligence, web development, and more and were established in 2012. Their midsize team is Lightwater, United Kingdom-based.

Mifort is a web development firm. Founded in 2015, the team focuses on web development and mobile app development. Their small company is Tallinn, Estonia-based.

Magicforce is a CRM consulting and SI company founded in 2019. Their small team is located in London, United Kingdom and L'viv, Ukraine. Their services include CRM consulting and SI.

Tech Alchemy is a software development studio based in London. Founded in 2016, they have around 150 employees who provide startups and small to medium-sized businesses with custom software development, blockchain development, and web & mobile app design and development. Services include prototyping, discovery, MVP development, and Web3 digital transformation

Digitals OYT Ltd., a custom software development firm, was established in 2022. They are based in London, United Kingdom and have a small team. Digitals OYT Ltd. Specializes in custom software development, IT staff augmentation, web development, web design, and more.

DabApps is a web and mobile application development agency based in Brighton, England. They were founded in 2010 and have a staff of 21 employees. They specialize in custom software, web, and mobile app development for primarily small business clients in the business services, consumer products, and education industries.

AVAMAE is a software solutions agency run by a team of fewer than 50 professionals founded in 2011. Based in London, the company offers custom software, web, and mobile app development services for small and medium-sized businesses from various industries, such as business services, financial services, and health care.

200OK Solutions is a mobile app development firm based in Ahmedabad, India. Founded in 2009, their team of 30 serves clients in the hospitality, transportation, and dental sectors. Services include custom software development and web design.

Phenomenon Studio is a digital product studio with a team of world-class designers, developers, and a  network of multi-specialized talent based in Kharkiv, Ukraine, and founded in 2018. They specialize in UX/UI design, web development, and mobile app development solutions for small and mid-market firms alike. 

Mobcoder is a software development company based in Seattle. They also have an office in Noida, India. Founded in 2014, their team of 40 employees provides mobile app development, custom software, and web development services to its midmarket and small business clients. They also serve enterprise clients. 

Imobisoft is a full-service mobile app & software development company based in Coventry, U.K., with an office in London. The company, founded in 2007, has a team of more than ten that provides custom software development, digital strategy, IoT development, web development, BI & big data consulting & SI, and SEO services. Imobisoft serves midmarket and other-sized companies in the medical, manufacturing, utilities, energy & natural resources, financial services, ane e-commerce industries.