Top 100 C# Developers in the United Kingdom

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Top 100 C# Developers in the United Kingdom

January 2023

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
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.7
    • 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 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

    Clients

    • Smith & Nephew
    • GAIL's Bakery
    • Costa Express
    • Pearson

    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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  • 2
    • $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 developed a Sharepoint solution to improve a children's charity organization's data management and delivered an interactive wiki. 

    "We were very impressed with Influential for the positive meetings and collaboration between our two companies."

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  • 3
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $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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  • 4
    • 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

    Geeks managed all aspects of development in creating a timeline visualization engine. The system extracts and imports historical data from a variety of sources using JavaScript.

    “While the others seemed wary of dealing with large databases and files, they were very enthusiastic about our project.”

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  • 5
    • $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 provided custom software development services for a body-worn video camera manufacturer. The team is constructing a digital evidence management system for reviewing security footages.

    "All key deliverables were met on time, often exceeding expectations."

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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 develops a tool that allows end-users to find information about importing and exporting processes. The team is responsible for designing the solution, linking to a payment system, and more.

    "They are very quick to respond to requests and provide explanations and suggestions to make ideas come to life."

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  • 7
    • $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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  • 8
    • $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

    • Apex
    • Virgin Atlantic Airways
    • Ipes
    • Good Energy

    Industries

    Notable Project

    Ballard Chalmers revamped and continues to support a SharePoint application with over 50,000 records, restructuring the database and customizing reporting.

    "They're good about keeping us up to date and moving things forward."

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  • 9
    • $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 was employed to deliver four HTML5 web tools that are used to create games and challenges for education purposes. 

    "They've gone the extra mile in obtaining resolutions to our problems, and have been very honest."

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  • 10
    • 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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  • 11
    • $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 developed an influence-predicting software platform for analytics of various campaign types. The platform allows for user login, payments, analytics, and social media integration. 

    "The cost-to-reward ratio was incredible."

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  • 12
    • 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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  • 13
    • $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 created a SharePoint system for facilitating document sharing, data, analytics, and resources. The system also included built-in communication tools.

    "BrightStarr is going to challenge us to do some new and innovative things, and think outside the box."

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  • 14
    • $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

    Dedicated members of the Atlas team worked to develop a new and mobile-optimized quoting solution that can handle a complex pricing model and allows for greater customer support.

    "The cleverness displayed by Atlas really gave us confidence in knowing that they would deliver."

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  • 15
    • $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

    • YourGene Health
    • Pastdrives Ltd
    • Zanzibar Amber Resort

    Industries

    Notable Project

    A managed IT service provider hired Full Metal Software to transfer their software into a cloud-based server and create new test and UAT areas. 

    "Full Metal handled the project brilliantly and continue to deliver great support."

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  • 16
    • Scheduling

      4.4
    • Quality

      4.8
    • Cost

      4.5
    • NPS

      4.7
    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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  • 17
    • $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 provides WordPress web design and development services for a London government office. Their work is ongoing with updating site functionality and a scheduled site rehaul in the near future.

    "They're always ready to help us in whatever way they can."

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  • 18
    • $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

    Working with Microsoft Stack, BGO Software built a web-based platform to manage a national health agency's workflow. They also integrated the site with an SQL server.

    "Their flexibility and passion for delivery are really impressive. They always go the extra mile."

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  • 19
    • Scheduling

      4.4
    • Quality

      4.6
    • Cost

      4.5
    • NPS

      4.7
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    • $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

    Incepteo re-platformed 14 websites to WordPress for an industrial microscopy equipment manufacturer. They created page layouts that took into account different languages and made performance improvements.

    “It was very obvious that each member of the organization who worked on our project wanted our project to succeed.”

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  • 20
    • $10,000+
    • 2 - 9 employees
    • Bristol, United Kingdom

    Blue Sparrow Apps is a development agency based in Bristol, England, and founded in 2015. With fewer than 10 employees, they specialize in mobile app and custom software development solutions for both small and medium-sized businesses.

    Clients

    • FanHub
    • Coeus Software

    Notable Project

    Blue Sparrow Apps developed a smartphone app for a religious organization. The final product uses an API to connect dozens of versions of the bible while integrating camera and video functionality.

    “Working creatively, they’ve developed a product that’s truly robust.”

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  • 21
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      4.7
    • NPS

      4.9
    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

    CCQ Tech provides custom software development services for an asset management consulting firm. They work on everything from UI to development, using C#, C++, and DevExpress as technologies.

    “They stand out for their ability to be agile and responsive to client needs regarding working practices and flexibility.”

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  • 22
    • $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 is helping a showering products manufacturing company develop their cloud-based infrastructure using Microsoft Azure IoT Hub. Their scope includes API and IoT development.

    “AVAMAE is very responsive, and they’ve delivered everything on time and as required.”

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  • 23
    • 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 custom site with transaction capabilities for a nonprofit. Currently, they continue to provide support on the client's backend process, ensuring that the content management and CRM work well.

    "They’re really making an effort to get to the bottom of our challenges."

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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
    • 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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  • 26
    • $10,000+
    • 10 - 49 employees
    • Bury St Edmunds, United Kingdom

    SourceCodeStudio is a small custom software development company. The Bury St Edmunds, United Kingdom-based company was founded in 2016. Their services include custom software development, ux/ui design, web development, e-commerce development, and more.

    Clients

    • Parcel SafePlace
    • Angel Ventlock
    • Hogarths
    • Tristel

    Industries

    Notable Project

    SourceCodeStudio has built a Xamarin-based kiosk app and web app written in .NET core for a parcel room safety firm. They help the client build a reliable and scalable system that could grow with their company.

    "They were extremely attentive."

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  • 27
    • $10,000+
    • 50 - 249 employees
    • Exeter, United Kingdom

    Software Solved is an Exeter, United Kingdom-based custom software development company. They specialize in custom software development, BI & big data consulting & SI, cloud consulting & SI, Artificial Intelligence, and more and were launched in 1998.

    Industries

    Notable Project

    Software Solved provides app development services for an insurance company. They’ve built a customer portal where users can acquire surveys and recommendations. They use .NET and C# as key technologies. 

    “They’re intelligent and great at what they do.”

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  • 28
    • $100,000+
    • 10 - 49 employees
    • Edinburgh, United Kingdom

    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.

    Industries

    Notable Project

    ClearSky Logic helps a letting agency develop custom software. The team has created a strategy to incorporate various systems's functionality into a single platform and ingests data from different sources.

    "It's refreshing to have the outcomes as expected from the briefing process."

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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 provides outsourced development services for an accounting software company. Their work is on a Microsoft stack using .NET, Azure, and React.

    For a small company, they have really been able to hire some excellent technical people.”

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  • 30
    • $10,000+
    • 10 - 49 employees
    • Birmingham, United Kingdom

    Eeze Solutions LTD, a mobile app development company, is based in 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

    Eeze Solutions LTD developed a website for a healthcare clinic. They held a discovery session with the client to discuss their goals and proposed a web design for the client's approval.

    "They designed it fantastically, and I am satisfied with it."

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