Top 100 C# Developers in London
The Best of December 2025Looking for a top C Sharp software development company in London?
The programming language C Sharp (C#), is general-purpose and used for web and mobile apps. It has a number of advantages: It's object-oriented, has automatic garbage collection, functions across platforms, has backward compatibility, and integrates well with other platforms and services.
To assist you in your search for a partner, we’ve compiled this list of the top C# developers in London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London C Sharp (C#) Software Development Companies
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31$10,000+10 - 49 employeesLondon, EnglandRead More
Software agency Atlas - Clever Software is headquartered in Essex and another office in London. With 17 employees, the agency specializes in web, custom software, mobile app development, and more for mainly midmarket businesses.
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BarclaysIndustries
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32$10,000+10 - 49 employeesLondon, EnglandHeadChannel Consulting, a software development company, is based in London, England; Katowice, Poland and New York, New York. The small team provides Custom Software Development, Artificial Intelligence, UX/UI Design, Web Development, and more and was founded in 2004.Read More
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The William Pears GroupIndustries
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33$25,000+10 - 49 employeesTirana, AlbaniaAtraX is a small IT strategy consulting company. The Tirana, Albania-based company was established in 2015. Their services include IT strategy consulting, IT staff augmentation, Custom Software Development, Web Development, and more.Read More
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34Undisclosed10 - 49 employeesLondon, EnglandBlue Ripples Technologies Private Limited is a software development company headquartered in Kulathoor, India; London, United Kingdom and Thiruvananthapuram, India. The midsize agency was launched in 2012. Their team provides custom software development, IoT development, Artificial Intelligence, and other application development.Read More
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35$25,000+50 - 249 employeesLondon, EnglandRead More
Global Talent is an IT firm based in London with more than 50 experts. Since their founding in 2017, they have provided IT staff augmentation, custom software development, and IT strategy consulting solutions for clients ranging from small firms to large companies.
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VodoriIndustries
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36$50,000+50 - 249 employeesLondon, EnglandSigli is a software development company. Their midsize team is in Antwerpen, Belgium; Vilnius, Lithuania; London, England and Amsterdam, Netherlands. The agency offers Custom Software Development, Artificial Intelligence, BI & big data consulting & SI, AI Consulting, and more. The agency was established in 2015.Read More
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Sensotec NVIndustries
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37$25,000+10 - 49 employeesLondon , EnglandRead More
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.
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BetDSIIndustries
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38$5,000+10 - 49 employeesLondon, EnglandAuthentic Digital, an UX design company, was launched in 2010. They are located in London, England; Hong Kong, Hong Kong and Kraków, Poland and have a small team. Authentic Digital offers UX/UI Design, Web Design, Custom Software Development, Blockchain, and more.Read More
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J.P. Morgan Asset ManagementIndustries
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39$25,000+50 - 249 employeesLondon, EnglandRead More
Artificial intelligence firm Incepteo was established in 2007. Their midsize team is headquartered in London, England; New York, New York and Hyderabad, India and provides Artificial Intelligence, Mobile App Development, UX/UI Design, Custom Software Development, and more.
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GeodisIndustries
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40$25,000+10 - 49 employeesLondon, EnglandRead More
Silicon Reef are a SharePoint development & Microsoft 365 solutions agency. Founded in 2016, they are located in the United Kingdom with offices in London, Chester, and Bournemouth. They offer a range of services from consultancy, campaign-based web or app development, and front-end creative. They also offer full-blown migration, strategic road-mapping, and full-service development partnerships and partner with medium-sized to enterprise clients.
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Unilever -
41$10,000+10 - 49 employeesLondon, EnglandRead More
Rightsoft LTD, a custom software development company, was launched in 2018. Headquartered in London, United Kingdom, their small team offers custom software development, web development, mobile app development, IT strategy consulting, and more.
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AsicsIndustries
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42$5,000+10 - 49 employeesLondon, EnglandKingIT Solutions is a Blockchain company. Their small team is located in London, England. Their services include Blockchain and Custom Software Development. The company was established in 2014.Read More
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43$25,000+250 - 999 employeesLondon, EnglandWeb design agency IT Labs is headquartered in Palm Beach Gardens, Florida; London, England; Noordwijk, Netherlands and Skopje, North Macedonia. The midsize team focuses on Web Design, BI & big data consulting & SI, UX/UI Design, IT strategy consulting, and more and was launched in 2005.Read More
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44$25,000+50 - 249 employeesLondon, EnglandRead More
Esynergy is a big data analytics company. They are headquartered in London, United Kingdom and have a midsize team. Their services include BI & big data consulting & SI, cloud consulting & SI, custom software development, mobile app development, and more.
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45$50,000+50 - 249 employeesLondon, EnglandRead More
Vodworks is a London, United Kingdom-based data analytics company. They offer BI & big data consulting & SI, custom software development, broadcast video, IT strategy consulting, and more and were launched in 2011.
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46$10,000+50 - 249 employeesStanmore, EnglandIn Stanmore, England and Raleigh, North Carolina, SATVA Softech is a midsize IT staff augmentation company. They focus on IT staff augmentation, Mobile App Development, Custom Software Development, and Artificial Intelligence and were founded in 2015.Read More
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RitzziIndustries
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47$10,000+50 - 249 employeesLondon, EnglandUbistart is a London, England-based software development company. They provide Custom Software Development and Mobile App Development and were launched in 2016.Read More
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48$25,000+50 - 249 employeesLondon, England2Base Technologies is a custom software development firm headquartered in London, England; Kochi, India; Dover, Delaware and Hilbert, Australia. The midsize agency was established in 2010. Their services include Custom Software Development, Artificial Intelligence, Mobile App Development, Enterprise App Modernization, and more.Read More
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United NationsIndustries
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49$75,000+50 - 249 employeesLondon, EnglandThe Virtual Forge, a big data analytics company, was established in 2010. The midsize Holt, United Kingdom-based team provides BI & big data consulting & SI, custom software development, cloud consulting & SI, devops managed services, and more.Read More
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SEGA Kelda Dynamics Ford Network RailIndustries
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50$5,000+10 - 49 employeesSurbition, EnglandRead More
Mrmmbs Vision, an application development firm, was established in 2011. The small team provides mobile app development, web development, custom software development, ux/ui design, and more. The agency is located in New Delhi, India and Surbition, United Kingdom.
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51$100,000+50 - 249 employeesLondon, EnglandInfinity Technologies is a midsize custom software development firm. The London, England-based company was founded in 2003. Their services include Custom Software Development, Web Development, Mobile App Development, and IT staff augmentation.Read More
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52$5,000+10 - 49 employeesLondon, EnglandIoT development company internetum was launched in 2012. Their small team is located in London, England. Their services include IoT development, Mobile App Development, and Custom Software Development.Read More
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53$50,000+50 - 249 employeesLondon, EnglandRead More
Founded in 2006, Vector Software Ltd is an IT outsourcing company based in L'viv, Ukraine. They have more than 50 employees that specialize in application testing and development. They mostly work with mid-market and small businesses.
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Stingray - Optical delousing solutions for fishing industry;Industries
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54$10,000+10 - 49 employeesLondon, EnglandTechtiq is a London, England-based app development firm. The small firm was launched in 2017. Their services include Mobile App Development, Web Development, Custom Software Development, and Web Design.Read More
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Oxford UniversityIndustries
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55$5,000+10 - 49 employeesLondon, EnglandRead More
Technology consulting firm Priocept is based in London. Their team includes 11 employees. Priocept has been specializing in e-commerce development, IT consulting, and web development since it was founded in 2004. Most of their partnerships include enterprise and midmarket clients.
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ArgosIndustries
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56$1,000+2 - 9 employeesFulham, EnglandRead More
Lisa Web Design is a web agency based in Küçükçekmece, Turkey with more than two employees. They have offered web design, custom software development, and web development solutions since their founding in 2013.
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Novarch E-CommerceIndustries
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57$10,000+10 - 49 employeesLondon, EnglandEstablished in 2022, Captivate Solutions Tech Ltd is a IT staff augmentation company. The small team offers IT staff augmentation, custom software development, application management & support, and enterprise app modernization. The agency is in London, United Kingdom.Read More
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58$10,000+50 - 249 employeesHo Chi Minh City, VietnamIT strategy consulting company INVINCIX Solutions Private Limited was founded in 2017. Their midsize team is in Singapore, Singapore; Bhubaneswar, India; Ho Chi Minh City, Vietnam and Twickenham, United Kingdom and provides IT strategy consulting, ux/ui design, IT managed services, custom software development, and more.Read More
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XimpleIndustries
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59$5,000+50 - 249 employeesLondon, EnglandRead More
Railay is a software development talent partner with headquarters in Ho Chi Minh City, Vietnam, and an office in London. Founded in 2010, their team of about 15 employees offers staff augmentation services in a quick, flexible, and scalable manner to mostly small-scale clients in e-commerce and education sectors. Additional services include custom software and e-commerce development.
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SoftbankIndustries
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60$10,000+10 - 49 employeesLondon, EnglandRead More
Launched in 2016, Furious Fox Limited is an app development company. Their small team is located in London, United Kingdom. Their team provides mobile app development, e-commerce development, Artificial Intelligence, custom software development, and more.
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