Top 100 Cross Platform App Developers in the United Kingdom

Light IT is a data science consulting and software development company located in Zaporizhzhia, Ukraine and founded in 2006. They have 132 employees who provide custom web and mobile software development services to various-size companies in advertising, finance, healthcare, travel, and education. This includes IT consulting, market research, QA, design, and business analytics.

Bladeware is an app development company that is headquartered in Zaporizhzhya, Ukraine. Founded in 2018, the team of work to provide mobile app development, custom software development, and application testing services to their small business clients. They primarily work with businesses within the education, information technology, and business services industries. 

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.

Red C London is a mobile app development agency, founded in 1997. Based in London, their team of 11 specializes in mobile app development, web design, and UX/UI design. They work primarily with enterprises and midmarket businesses, focusing on financial services, government, and nonprofits.  

*instinctools is a custom software development company. They are headquartered in Stuttgart, Germany; Warszawa, Poland; Mississauga, Canada and Wilmington, Delaware and have a midsize team. Their services include Custom Software Development, Web Development, IT strategy consulting, Mobile App Development, and more. The firm was launched in 2000.

Theodo UK, founded in 2015, is a consultancy and digital development agency headquartered in London with an additional location in Paris. With a team of over 30 employees, they mainly provide mobile app development, web development, and custom software development services.
 

Founded in 2011, Indiespring is a development firm. Their team of around 20 employees is based in Manchester, United Kingdom. They focus on mobile app development, app marketing, and application testing.

Dept is a web development firm that was founded in 2016. They have a team of over 1,300 employees, spread out over four offices in Boston, Amsterdam, Berlin, and Manchester, U.K. They offer web development, UX/UI design, and web design to midmarket and enterprise companies across the globe.
 

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.

TkXel is a mobile app and web development company founded in 2007. With its headquarters in Reston, Va., and an office in Lahore, Pakistan, they have a team of 318 employees. Their services include mobile app development, web development, and custom software development. They primarily serve small and midmarket clients. 

Software development firm KosmosKod was launched in 2022. Located in London, United Kingdom, their small team provides custom software development, mobile app development, web development, enterprise app modernization, and more.

Established in 2016, AppsNation is an application development company. Their midsize team is located in Los Angeles, California; Los Angeles, California; Dubai, United Arab Emirates and Dallas, Texas and focuses on Mobile App Development, AR/VR development, Low/No Code Development, Custom Software Development, and more.

xDesign is a design and development company in Edinburgh, U.K. Founded in 2010, their team of 50+ provides web development and mobile app development services to small business, midmarket, and enterprise clients across various industries. 

Web development company 10up is headquartered in Sacramento, California; Boston, Massachusetts; New York, New York and London, United Kingdom. The agency provides web development, ux/ui design, web design, digital strategy, and more and is midsize.The agency was established in 2011.

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.

Founded in 2010, PioGroup Software is a development company based in Kharkiv, Ukraine. They have a small team of fewer than 50 people, and they primarily work with small businesses. 

CodeLeap is a London, United Kingdom-based application development firm. The small team specializes in mobile app development, web development, Artificial Intelligence, AR/VR development, and more. The company was founded in 2019.

MyOxygen is a 10+ team of mobile app developers, UI/UX designers, and digital strategists. Based in Bristol and founded in 2001, the company uses a comprehensive approach that aligns business needs with remarkable results.

SPD Group is an IT and development company in London, United Kingdom; Kyiv and Cherkasy, Ukraine; and Tel Aviv, Israel. Founded in 2006, they have about 16 employees that serve mostly midmarket and small-business clients in the business, financial, and IT sectors. Services include custom software development, AI, and IoT development.

Founded in 1998, AtomicMedia is a digital agency that works with enterprise, mid market, and small businesses. With two UK offices in Nottingham and Shoreditch, the team of 50  specialize in mobile app development, SEO, content marketing, PPC, web design, UX/UI design, and web development services for client.

Waracle is a digital products specialist in the UK with offices in London, Glasgow, Edinburgh, and Dundee. Founded in 2007, the company has more than 150 employees delivering high performance apps for mobile, web, Internet of Things, mixed reality, artificial intelligence, and voice. Waracle operates across a range of industry sectors, from fintech, energy, and digital health, to industrial IoT and oil and gas.

Shout Digital is a web and mobile app development company founded in 2009. They have a team of roughly 33 employees across their three locations: Newcastle upon Tyne, England, London, and Philadelphia. Their clients include small businesses and midmarket firms in various industries including government, financial services, and consumer products and services.

DIGIMETA DEV LTD is a midsize. Established in 2022, the company is located in London, United Kingdom; Gloucester, United Kingdom and Bengaluru, India. Their services include.

ClearSky Logic, a custom software development firm, was founded in 2018. The firm offers custom software development, BI & big data consulting & SI, cybersecurity, and IT staff augmentation and has a small team.

Communication Crafts is a digital technology agency founded in 2005 and based in Ahmedabad, India, with a secondary office in Hampshire, UK. Communication Crafts boasts a team of more than 150 employees who provide a host of different services including web development, mobile app development, and video production, among others.

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

Instil Software is a software engineering firm based in Belfast, Northern Ireland. Founded in 2005, Instil has about 30 employees that work across a variety of industries. They offer custom software development, mobile app development, cloud consulting and software integration, IoT, and web development.

Vega IT is a midsize software development company. Founded in 2008, the firm is located in Novi Sad, Serbia; New York, New York and London, England. Their services include Custom Software Development, CRM consulting and SI, Mobile App Development, E-Commerce Development, and more.

3rd Digital is a small Ahmedabad, India-based mobile application development company. Founded in 2017, the team specializes in mobile app development, web development, custom software development, ux/ui design, and more.

Internet Dreams Studio is a small London, United Kingdom-based e-commerce development company. Their services include e-commerce development, mobile app development, search engine optimization, web design, and more.