Top 100 C# Developers in the United Kingdom

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Top 100 C# Developers in the United Kingdom

August 2022

Looking for a top C Sharp software development company in the United Kingdom?

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. 

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List of the Best United Kingdom C Sharp (C#) Software Development Companies

  • 1
    • $10,000+
    • 50 - 249 employees
    • London, United Kingdom

    Influential Software is a software development firm in London, United Kingdom; Maidstone, United Kingdom and Glasgow, United Kingdom. The firm focuses on custom software development, web development, BI & big data consulting & SI, IT managed services, and more and has a midsize team.The firm was launched in 1993.

    Clients

    • Deloitte
    • American Express
    • London Stock Exchange
    • Pret a Manger

    Industries

    Notable Project

    Influential Software provided certified Apple and Microsoft training for an IT support company. 

    "They clearly understood our training requirements and were able to recommend the courses that we would need."

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  • 2
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.8
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $50,000+
    • 250 - 999 employees
    • London, United Kingdom

    One Beyond is a bespoke software development company headquartered in Farnborough, England with additional engineering centers in London, Manchester, England, and Madrid, Spain. Across international locations, they have a team of more than 250 individuals providing custom software, mobile application, and web development services to a diverse clientele. They support established businesses, nonprofits, government organizations, and startups

    Clients

    • Mitsubishi
    • Hospify
    • Skanska
    • Water Aid

    Industries

    Notable Project

    One Beyond (formerly DCSL GuideSmiths) developed a cloud-based web app for a contract company. The digital tool lets users define large construction projects and streamlines the procurement process for contractors.

    “Whenever there was a problem, they helped us come up with a solution.”

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  • 3
    • $50,000+
    • 50 - 249 employees
    • Belfast, United Kingdom

    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.

    Industries

    Notable Project

    Instil Software wrote an observability software's code that integrated with an existing Java environment. They’ve since expanded their role to include Java development.

    "Great engineers are hard to find and the two we had working with us were clearly top-notch."

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  • 4
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
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    • $5,000+
    • 10 - 49 employees
    • Great Baddow, United Kingdom

    Objective is a software development firm. The small Great Baddow, United Kingdom-based team provides custom software development, BI & big data consulting & SI, Artificial Intelligence, conversion optimization, and more. The agency was launched in 1987.

    Clients

    • Epson
    • International Institute for Strategic Studies
    • Chelmer Housing Association
    • TTP - The Technology Partnership

    Industries

    Notable Project

    Objective was hired by a duplicate bridge platform to improve their services and streamlines for entries. The main goal was to create a multi-user interface for their calendar of events.

    "There was no point at which we stumbled aside from my own workload being too much to provide input!"

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  • 5
    • Scheduling

      4.5
    • Quality

      4.6
    • Cost

      4.4
    • NPS

      4.6
    Read Full Reviews on Clutch Visit Site
    • $50,000+
    • 50 - 249 employees
    • Sutton, United Kingdom

    Geeks is a software development company in London. Founded in 2007, Geeks' team of 85 specializes in custom software development, web development, and mobile app development, primarily for midmarket clients in media and govenment.

    Clients

    • BBC
    • EasyJet
    • Euromoney
    • Mitie

    Industries

    Notable Project

    A real estate brokerage hired Geeks Ltd for custom software development services. The team handled the client's intranet support services, CRM, document processing, and mobile optimization.

    "We were impressed by their knowledge, communication style, and professionalism."

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  • 6
    • $25,000+
    • 2 - 9 employees
    • SHEFFIELD, United Kingdom

    Inflecto Systems, a software development company, is located in SHEFFIELD, United Kingdom. The firm provides custom software development, mobile app development, and business consulting and has a small team.The firm was founded in 2006.

    Industries

    Notable Project

    Inflecto Systems built a software that could ease the day-to-day operations of an electricity generation company. The software stores certificates and modules and generates documentation based on captured data.

    "Inflecto’s customer service is brilliant and a definite stand-out for us."

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  • 7
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      4.8
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 10 - 49 employees
    • London, United Kingdom

    Atom CTO is a software company based in London with more than 10 experts. Founded in 2017, they offer IT strategy consulting, application management and support, and business consulting solutions for both small and medium-sized companies.

    Clients

    • Accelerated Payments Limited

    Industries

    Notable Project

    Atom CTO provides business consulting services to a startup. They help identify funding opportunities, and they strategize how to increase sales. They also help determine the client's right target market.

    "Their work has helped me pivot many times to set myself up for success."

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  • 8
    • $25,000+
    • 10 - 49 employees
    • Manchester, United Kingdom

    Based in Manchester, UK, Corporation Pop has been around for over a decade and is now an established part of the mobile and web development industry. The small team delivers powerful results to clients across several industries.

    Clients

    • NHS
    • The Cream Group
    • Live Nation
    • BBC

    Industries

    Notable Project

    Corporation Pop developed a new gaming experience using Unity for an immersive gaming company. The client provided thorough documentation, and then Corporation Pop created the artwork and sound and game design. 

    "Corporation Pop's team clearly cares a lot about the projects they're working on."

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  • 9
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.7
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $50,000+
    • 10 - 49 employees
    • Manchester, United Kingdom

    Founded in 2010, Silverchip is located in Manchester, United Kingdom. Their team of 13 employees provides mobile app development and custom software development services for enterprise, midmarket, and small businesses.

    Clients

    • Suits Me Banking
    • England Squash
    • LGBT Foundation
    • Boundary Outlet

    Industries

    Notable Project

    Silverchip developed a documentation system to make it quicker and more customizable. They built out the database architecture and added a template builder. They developed with React, JavaScript, and C++.

    “They enjoy what they do, and it shows in what they deliver to their clients.”

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  • 10
    • $10,000+
    • 2 - 9 employees
    • WOLVERHAMPTON, United Kingdom
    KSB Technologies is a custom software development company. The small WOLVERHAMPTON, United Kingdom-based team focuses on custom software development, web development, IT strategy consulting, cloud consulting & SI, and more. The agency was founded in 2021.

    Clients

    • DFE
    • Hiscox
    • ESFA
    • AutoFlow

    Notable Project

    KSB Technologies was hired by a software development company to provide new functionality and enhancements for their customers. They were also tasked with reducing bugs on their offered products.

    "They provided some unique approaches to problem-solving."

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  • 11
    • $10,000+
    • 50 - 249 employees
    • Eashing, United Kingdom

    BrightStarr was founded in 2006 and is a custom software development company. Headquartered in Seattle, WA with additional offices in the UK and New York, the team of 126 also offers web and mobile app development and productivity consulting to help clients streamline their internal business processes.

    Clients

    • Abt Associates
    • Adidas
    • ARCADIS
    • Barclay's

    Industries

    Notable Project

    BrightStarr helped launch and promote a customized, out-of-the-box SharePoint 2010 solution. The team developed Web parts to enhance the intranet and improved content management.

    "What was really impressive was their hybrid model of being a creative firm and a development firm."

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  • 12
    • $10,000+
    • 10 - 49 employees
    • Manchester, United Kingdom

    VTS Software is software development company located in Manchester, U.K. Since 2007, their small team of around 5 has been specializing in custom software, web, and mobile app development for small and mid-sized businesses alike. They have experience in a variety of industries such as advertising, healthcare, manufacturing, and business services. 

    Clients

    • Whispering Smith
    • ATS Heritage
    • Speakr

    Industries

    Notable Project

    VTS Software worked on bespoke software development, building both the front- and backend. They used AngularJS and C# for the Silverlight, native Android, and web app development.

    "All the requirements were delivered within the defined scope and timeframe."

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  • 13
    • $10,000+
    • 10 - 49 employees
    • Southend-on-Sea, United Kingdom

    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.

    Clients

    • Barclays
    • Investec Asset Management
    • M & G
    • Prudential

    Industries

    Notable Project

    Atlas - Clever Software developed an app for a corporate accounting firm. The firm wanted an app that would increase company engagement. Atlas - Clever Software handled everything development-wise. 

    "The app was very well received by our team, by the rest of the company, by the board members, and now our customers. It’s a unique offering that none of our competitors are able to contend with." – Head of Internal Delivery, Corporate Accounting Firm

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  • 14
    • $5,000+
    • 250 - 999 employees
    • London, United Kingdom

    Exato Software is a development agency based in Jaipur, India. They were founded in 2019 and have a team of around 10 employees. Their main services include custom software, web, and mobile app development for small businesses. 

    Clients

    • Mezatwins
    • Consumer Truth
    • Waggy Tail Petcare
    • Karachi Kitchen

    Industries

    Notable Project

    A car rental company tapped Exato Software to develop an easy-to-use website on .NET that would describe their services. They also optimized the website's SEO to improve its search engine rankings. 

    "Their professionalism was flawless, and they kept every promise diligently."

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  • 15
    • $10,000+
    • 2 - 9 employees
    • London, United Kingdom

    Browser London is a digital product agency based in London, United Kingdom. This company has 11 employees and was founded in 2008. Services offered by Browser London include UI/UX design, web design, and custom software development for companies of all sizes.

    Clients

    • Mayor of London
    • Lightning API
    • Shell
    • NHS

    Industries

    Notable Project

    Browser London created a simple software platform for a supply chain transparency firm. The client worked with a UI/UX specialist and a senior web developer to build the prototype. 

    "They were highly involved and engaging. We also came up with some good ideas for how to present information together."

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  • 16
    • $10,000+
    • 10 - 49 employees
    • Wimborne, United Kingdom

    Ballard Chalmers is a software development company based just south of London. Founded in 2005, their team provides custom software development, modernisation and integration, as well as support and IT Managed Services.

    Clients

    • Electrolux
    • Virgin Atlantic Airways
    • Investec
    • American Express

    Industries

    Notable Project

    Ballard Chalmers Ltd provides software development services to support an application for a luxury yachting company. The team not only manages the platform to ensure stability but also advances the product.

    "Their levels of transparency and honesty distinguish them from other providers."

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  • 17
    • $25,000+
    • 10 - 49 employees
    • London, United Kingdom

    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.

    Clients

    • BetDSI
    • Strengthscope
    • Clevry
    • Buyfair

    Industries

    Notable Project

    AVAMAE Software Solutions Ltd developed the backend of an iOS app, featuring a database and cloud-based API endpoints. They also wrote flight control programs for drones that report on farmers’ fields.

    “They’ve done a really good job throughout the project.”

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  • 18
    • Scheduling

      4.4
    • Quality

      4.4
    • Cost

      4.5
    • NPS

      4.7
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 50 - 249 employees
    • London, United Kingdom

    Incepteo is an innovation-led ‘IDEA TO MARKET’ technology services firm providing 360-degree offerings starting from software development, hosting, support, and digital marketing. Our mantra is to deliver growth outcomes with entrepreneurial vision, effective user experience, and innovation. We bring start-up know-how, corporate maturity, and strategic techno- entrepreneurial experience on the table from inception to growth phases.

    Clients

    • Geodis
    • Betterlogic
    • Capium
    • Vision Engineering

    Industries

    Notable Project

    An advocacy organization hired Incepteo to develop a portal. The site is a database for suppliers and corporate buyers, allowing filtered searches. The team is now helping the client migrate the platform.

    “They’re there for us whenever we need them, always happy to help and go above and beyond.”

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  • 19
    • Scheduling

      4.5
    • Quality

      4.9
    • Cost

      4.5
    • NPS

      4.8
    Read Full Reviews on Clutch Visit Site
    • $5,000+
    • 10 - 49 employees
    • Coventry, United Kingdom

    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. 

    Clients

    • NHS (Multiple divisions)
    • BSkyB
    • E-Energy
    • Northern Gas Networks

    Industries

    Notable Project

    An energy supplier hired Imobisoft to provide web and app development. Their efforts also include UI/UX design for a platform that allows salespeople to streamline their processes.

    "Imobisoft developed a web and mobile app using .NET  technologies. The application allows us to bring on thousands of new customers . Without the software they created for us, we wouldn’t be generating sales. We're very satisfied with the design and the application, and it couldn’t be better".

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  • 20
    • $10,000+
    • 50 - 249 employees
    • London, United Kingdom

    BGO Software is a Bulgarian software design company that has offices in Sofia, Plovdiv, and London, U.K. Established in 2008, the company employs a team of 73 who specialize in software and mobile app development. 

    Industries

    Notable Project

    BGO Software provides ongoing technical and development services for live products. They work with existing databases and code to add new features, make enhancements, and expand functionality.

    “The quality and personalized level of service BGO Software delivers is notably special.”

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  • 21
    • Scheduling

      4.0
    • Quality

      4.5
    • Cost

      4.5
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • Undisclosed
    • 2 - 9 employees
    • Bollington, United Kingdom

    ACS is a software house based in Bollington, England, and founded in 2099. Their team of no more than 10 specializes in custom software development, mobile app development, and big data consulting solutions for clients in the fields of hospitality and healthcare.

    Clients

    • Common Goal
    • The Manchester United Supporters Trust
    • Fifa
    • Sony Music

    Industries

    Notable Project

    ACS developed a website for an athletic nonprofit. ACS worked on the backend and content of the nonprofit’s website to make it more easily manageable. ACS’s work has left a positive impact on the nonprofit.

    “There’s a high level of trust between our company and ACS.” - Co-Founder, Athletic Nonprofit

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  • 22
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 10 - 49 employees
    • Cambridge, United Kingdom

    Founded in 2004, Computer Conquest is an IT managed services company. The company offers IT managed services, cloud consulting & SI, custom software development, IT strategy consulting, and more and has a small team. The company is in Cirencester, United Kingdom.

    Clients

    • The Woodhouse Partnership
    • Brickflow
    • Huma Business Intelligence
    • Misys / Finastra

    Industries

    Notable Project

    A mentoring charity hired Computer ConQuest (CCQ) to develop a web application to connect mentors and mentees. The team added features to book sessions through a calendar and to leave feedback.

    "CCQ was trustworthy and genuine in what they were trying to do."

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  • 23
    • Scheduling

      4.5
    • Quality

      5.0
    • Cost

      4.5
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 2 - 9 employees
    • Fleet, United Kingdom
    Ei Square® is a Fleet, United Kingdom-based big data analytics company. The firm focuses on BI & big data consulting & SI, custom software development, and IT staff augmentation and is small.The firm was founded in 2019.

    Clients

    • Fintech
    • Social Housing

    Industries

    Notable Project

    Ei Square provided business intelligence and process streamlining services. They leveraged their expertise by decommissioning old reports and automating the migration of data through dashboards into reports. 

    "In my view, I have full confidence." 

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  • 24
    • $25,000+
    • 10 - 49 employees
    • London, United Kingdom

    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. 

    Clients

    • Unilever
    • Asahi
    • Anglo American
    • SEGA

    Notable Project

    Silicon Reef created two SharePoint solutions for a resources and agriculture NGO spread between the United Kingdom and Africa. They made it so all teams can access tools and final documentation.

    “Their best selling point is their willingness and desire to understand our operating model.”

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  • 25
    • $10,000+
    • 10 - 49 employees
    • Birmingham, United Kingdom
    Eeze Solutions LTD, a mobile app development company, is based in Karachi, Pakistan and Birmingham, United Kingdom. The small firm was founded in 2018. Their services include mobile app development, custom software development, ux/ui design, web development, and more.

    Clients

    • Software development complete screen shots

    Industries

    Notable Project

    An e-commerce platform hired Eeze Solutions LTD to provide web development. They created the site from scratch using WordPress and Shopify and are currently involved in marketing efforts.

    ''I had a great experience with them; the commitment was good, everything was on time, and they figured out every problem.''

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  • 26
    • Scheduling

      4.5
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom

    TechTIQ Solutions is a web design and development agency in London. Founded in 2017, they have about 5 employees that work with a range of clients.  

    Clients

    • Oxford University
    • Imperial College London
    • Total Active Solutions
    • Sake Sommelier Association

    Industries

    Notable Project

    TechTIQ Solutions developed a website and mobile app. Its features include online ordering in addition to ordering through Facebook and the mobile app. They continue to maintain both services.

    “They have an expert mobile app development team and always respond to our inquiries.”

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  • 27
    • $5,000+
    • 2 - 9 employees
    • Northampton, United Kingdom

    Full Metal Software is a bespoke software development agency located in Northampton, England. Founded in 2004, they have three employees specializing in full stack web development and innovative business solutions for small and midmarket companies, typically in business services, finance, and healthcare. Services include project management, code updating, CMS support, software development, and outsourcing.

    Clients

    • Zanzibar Amber Resort
    • YourGene Health
    • Pastdrives Ltd

    Industries

    Notable Project

    Full Metal Software developed a baseBot molecular diagnostics platform for a biotechnology company to replace a legacy system built on Excel spreadsheets. They managed the project seamlessly, implementing internal ideas while sharing their own insights. Full Metal Software’s platform eliminated the need for multiple spreadsheets, delivering significant time-saving results to the client.

    “Project management has been very good. Although it’s like speaking two different languages between our computer and scientific backgrounds, they’ve worked really hard to implement our ideas. They’ve also pushed their own ideas that they know will benefit us.” – Research & Development Scientist, Biotechnology Company

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  • 28
    • Scheduling

      4.6
    • Quality

      4.9
    • Cost

      4.6
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 10 - 49 employees
    • Leeds, United Kingdom

    Ventureaxis is a small custom software development firm. Established in 2003, the agency is in Leeds, United Kingdom. Their services include custom software development, web development, enterprise app modernization, and mobile app development.

    Industries

    Notable Project

    Ventureaxis develops two main software, one is an order management app for a major retail platform, and the other a middleware solution for processing orders manually via API through smaller platforms.

    "Having direct access to the developers alongside the project manager ensured that our exact needs were met."

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  • 29
    • $5,000+
    • 50 - 249 employees
    • Sudbrooke, United Kingdom

    Inncrewin Technologies is a software agency based in Bangalore, India, and founded in 2008. Their team of more than 50 offers custom software, web, and mobile app development solutions for small and mid-market firms in the fields of e-commerce, hospitality, and advertising.

    Clients

    • Signature Flow
    • MeetingSense
    • SafeSend Tax Solution

    Industries

    Notable Project

    Inncrewin Technologies provided development services for an accounting software company. The company was looking for an Indian vendor to save up on development costs. The company is impressed with Inncrewin Technologies’ work.

    “They’re structured about their work and are quite flexible.” - CTO, Accounting Software Company

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  • 30
    • $10,000+
    • 2 - 9 employees
    • Leeds, United Kingdom

    Founded in 2010, NewRedo Ltd. is a software development company headquartered in Leeds, England. Their team of under 10 serves businesses of all sizes in industries such as healthcare, financial services, and government. Services include custom software development, IT managed services, and mobile app development. 

    Clients

    • RaceBest
    • Off Limits
    • British Library

    Industries

    Notable Project

    NewRedo Ltd. developed a backend web API to a game development company. The company was impressed with the team's ability to deliver a high-quality product.

    "NewRedo is really communicative and really friendly." – Technical Director, Game Development Company

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