Top C# Development Companies & Expert C# Developers in UK

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4.9 out of 5, based on 116 real reviews.
Rankings updated: Feb 21, 2026

List of Top C# Development Companies in UK| Best C# Developers & Service Providers

Certain agencies may be featured through sponsored placements. Rankings and SF Scores remain unbiased and are based solely on our evaluation methodology.

68 Companies

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18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Mobile App Development

  • 20% Web Development

  • 20% Digital Transformation

Blockchain | Web3 | Mobile apps | Games

We are an award-winning IT development business situated in London that specializes in web3 and blockchain development. Among other things, we have expertise designing products and creating web, mobile, and DApp apps. We also offer legal and ICO/INO advisory services to our clients.

View KingIT Solutions Profile
Inside Service Listing

$25-$49/hr

Hourly Rate
Inside Service Listing

$10,000+

Min. Budget Size
Inside Service Listing

50 - 249

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Mobile App Development

  • 20% Web Development

  • 10% Web Design

  • 10% Digital Transformation

Growth Gateway

WezSol is your go-to digital architect, developing custom tech solutions for long-term company development. WezSol is your reliable partner whether you're an established company updating your online presence or scaling technology, or a visionary entrepreneur with an MVP concept navigating the difficulties of growing with technology.

View WezSol Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$5,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Web Development

  • 20% IT Services

  • 20% Digital Transformation

  • 20% AI Development

Taking startups to enterprise businesses!

With a primary focus on helping businesses navigate the challenges of growing to accommodate large user bases while avoiding expensive technical errors that hinder firms from scaling, Apexa began as a software consulting firm. We have expanded globally, supporting companies in the US, UK, and Scandinavia as they grow.

View Apexa Tech Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$25,000+

Min. Budget Size
Inside Service Listing

2 - 9

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Mobile App Development

  • 20% Web Development

  • 20% Web Design

Think.Design.Engineer

Our goal is to use our combined design and technology methodology to turn "business ideas" into well-engineered mobile and/or web applications. As leaders in the online and mobile industries, we provide organizations consulting and a comprehensive packaged solution to give them a competitive advantage in both the B2B and B2C markets.

View Unikove Technologies Profile
Inside Service Listing

$25-$49/hr

Hourly Rate
Inside Service Listing

$1,000+

Min. Budget Size
Inside Service Listing

50 - 249

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Mobile App Development

  • 20% Web Development

  • 20% Web Design

  • 20% Digital Marketing

Technical Origami: Virtually anything is possible.

The staff at Technical Origami works exclusively to develop technological solutions that go above and beyond your expectations. We realize your dream by fusing your concepts and business objectives with our knowledge, experience, and inventiveness to create stunningly designed, audience-driven user experiences across a variety of platforms.

View Technical Origami Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$1,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 70% IT Services

  • 5% Mobile App Development

  • 5% Web Development

Connect best companies with best talents globally

By offering remote software development teams, Cube assists customers in expediting the creation of new products. We are able to find uncommon specialists with understanding of cutting-edge technology and have access to a reservoir of outstanding talent throughout Eastern Europe and Latin America. We want to give you the technology team you will collaborate with for many years to come. Since 2008, we have fostered enduring, steady technological partnerships with US and European businesses. Founded in the UK, Cube has research and development facilities in Brazil, Poland, and Ukraine. Focus on the industry: Banking & FinTech Edtech and eCommerce Automation of Marketing Medical Care Logistics & Travel Management of businesses Blockchain, AI, and ML Platform emphasis: SaaS/PaaS Mobile Web Professionals available: Mobile and web developers Platforms for enterprises Experts in AI/ML Scientists of Data UI/UX QA, which includes automated PMs.

View nCube Profile
Inside Service Listing

$25-$49/hr

Hourly Rate
Inside Service Listing

$50,000+

Min. Budget Size
Inside Service Listing

50 - 249

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 40% Digital Marketing

  • 20% Web Design

  • 20% Digital Transformation

Your Marketing Extension

London-based Molo is a vibrant digital firm with a young, diverse staff of tech enthusiasts. We remain ahead of the curve since we are located in the thriving center of London's creative sector. Our experience ensures success in important business areas: • Design and Development of Websites • Development of AI and Software • Digital Advertising and Marketing • Innovative Content Options Molo is a young, tight-knit, and quickly growing team of professionals that specializes in innovative website design and digital marketing tactics. With an average age of 25, we are well-versed in the digital world and understand the practical limitations as well as the creative demands that businesses must contend with. Looking for an eye-catching, high-performing website or digital campaign that inspires viewers and performs well in search results but also resonates with audiences, boosts sales, and drives new business? Look no further – Molo can turn your vision into reality.

View Molo Agency Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$5,000+

Min. Budget Size
Inside Service Listing

2 - 9

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Mobile App Development

  • 20% Web Development

  • 20% IT Services

  • 20% Digital Transformation

Accelerate your business growth with our advanced

High-quality IT solutions and services OTS is a well-known technology service provider that meets the various demands of enterprises. Our skilled team of knowledgeable and experienced individuals works hard to develop reliable, strong, and easy-to-use software solutions that meet and even exceed our clients' needs. We take great pleasure in offering comprehensive and effective solutions that help our clients thrive in the modern digital world. Among the services we offer are: Development of Custom Software Enhancement of IT Personnel Personalized ERP Development of Web Applications Development of Mobile Applications, DevOps, and Cloud Services Designing UI/UX and IT Outsourcing Why pick us: Competitive pricing: We guarantee that our clients get outstanding value for their investments by charging less than $25 per hour for our services. On-time project delivery: To guarantee that we always complete projects on schedule, we employ tried-and-true techniques and industry best practices. Our clients can count on us to surpass their expectations and fulfill their deadlines. Excellent skill set: Our staff is made up of professionals with years of experience and expertise in their industries. We possess the know-how to take on challenging projects and provide excellent results that satisfy the particular needs of our clients.

View ONE Technology Services Profile
Inside Service Listing

$25-$49/hr

Hourly Rate
Inside Service Listing

$5,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 60% AI Development

  • 20% Blockchain Development

Business Enablers

With less than 20 employees, Mitosis Technologies is a bespoke software and application development firm that was established in 2013. By 2020, they will have more than 250 developers with experience in data science and artificial intelligence, along with other services like blockchain development, big data and data analytics, web and mobile application development, product development for startups, digital transformation, and custom software development for clients of all sizes. Mitosis's flawless solutions improve the company. Development of Custom Software Development of Software Products Development of Desktop and Web Applications Development of Mobile Applications Cloud Computing & Consulting Development of Blockchain Data Science & AI, Big Data & Data Analytics, and Advanced Analytics

View Mitosis Technologies Profile
Inside Service Listing

$25-$49/hr

Hourly Rate
Inside Service Listing

$10,000+

Min. Budget Size
Inside Service Listing

250 - 999

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 30% Web Development

  • 30% IT Services

  • 20% Mobile App Development

Quality Flexible Outsourced Software Solutions

Leading-edge IT outsourcing and resourcing (staff augmentation) solutions are offered by software development partner Advance Web Software. Software executives worldwide rely on Advance Web Software to provide the greatest bespoke web & mobile apps from beginning to end, whether they are refining an existing product or creating a whole new idea from the ground up. Staff augmentation adds highly qualified people to an internal team in a seamless manner. To meet software development needs and pay off tech debt, our partners hire our specialists as needed. The management has offices in the UK and India, where we have more than thirty engineers. Our areas of expertise include developing complicated online apps (ASP.NET, React, Drupal), native iOS and Android mobile applications (Swift, Flutter), and Microsoft technologies (.NET, Xamarin, Azure). Software executives may be sure that the project will be finished on schedule, under budget, and with the greatest personnel available when they hire Advance Web Software. Because of this, more than 91% of our clients come back to us for further work. Contact us now to find out how we can assist you. At talent@advancewebsoftware.com, get in touch. Frameworks & Languages: Frontend Development: React, Flutter, and Angular Backend Development: Microservice Architecture, PHP, ASP.NET, and.NET Swift, Kotlin,.Net MAUI/Xamarin, Flutter, iPhone applications, and Android apps are examples of mobile development. Database design: MySQL, MongoDB, and SQL Integrations: Third-party API,Integrations, payment gateway,Microsoft Technologies

View Advance Web Software Limited Profile
Inside Service Listing

< $25/hr

Hourly Rate
Inside Service Listing

$5,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Mobile App Development

  • 20% Web Development

  • 20% IT Services

  • 20% Cloud Computing Services

IT Experts, Services,Remote Staff & Team Augmentations

Both completely managed and unmanaged technology services and specialists are available from Zepto Systems. Technical innovation, web development, mobile app development, software quality assurance, customer support, server infrastructure, and cyber security are all included in the services offered. Additionally, they have contributed to the creation, deployment, and maintenance of online retail, CRM, ERP, and CMS applications. With five offices throughout the globe and sizable technology development and delivery teams catered to client requirements, they are able to optimize delivery while drastically reducing and controlling costs by 60%. Complete management consultancy, agency/project delivery, and remote/virtual-employees/resources, where you can use ours or apply your own management, are among their three flexible delivery options.

View Zepto System Profile
Inside Service Listing

$25-$49/hr

Hourly Rate
Inside Service Listing

$25,000+

Min. Budget Size
Inside Service Listing

50 - 249

Team size
Inside Service Listing

UK

Location

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

18

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Web Development

  • 20% AI Development

  • 20% Cloud Computing Services

  • 10% Mobile App Development

  • 10% IT Services

TeraCode: Beyond Code, Delivering Impact

TeraCode has been transforming software development since 2006, focusing on transforming complex business challenges into powerful digital solutions. Their expert teams offer custom software development, IoT integration, data science solutions, AI implementation, and digital transformation. They provide tailored applications, data insights, intelligent automation, and modernization of systems to future-proof businesses. TeraCode stands out for their commitment to customer success, moving faster and going deeper than competitors. They are not just developers, but digital acceleration partners, helping businesses unlock their full potential and transform visions into reality.

View TeraCode Profile
Inside Service Listing

N/A

Hourly Rate
Inside Service Listing

$1,000+

Min. Budget Size
Inside Service Listing

50 - 249

Team size
Inside Service Listing

UK

Location

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 15% Software Development

  • 15% Ecommerce Development

  • 15% Mobile App Development

  • 15% Web Development

  • 10% Internet of Things

  • 10% AI Development

  • 10% Cloud Computing Services

  • 10% CMS

Begin your digital journey

At Pulsion Technologies, we collaborate with businesses to provide cutting-edge digital services and solutions. Pulsion, a reputable supplier to the public and private sectors, helps its customers increase company efficiency. Our solutions are all created with your company's goals in mind, whether they are to boost productivity, boost sales, or cut expenses.

View Pulsion Technology Profile
Inside Service Listing

< $25/hr

Hourly Rate
Inside Service Listing

$1,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

UK

Location

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 10% Software Development

  • 60% Ecommerce Development

  • 20% Web Development

  • 10% Digital Transformation

Website and Ecommerce development

We design distinctive, contemporary websites that are tailored to the demands of our clients. In 2008, Avrion was established as an event management company. Five years later, we are beginning with web projects, building websites first, followed by web stores. We've finished more than 120 projects thus far.

View Avrion Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$1,000+

Min. Budget Size
Inside Service Listing

2 - 9

Team size
Inside Service Listing

UK

Location

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 10% Software Development

  • 20% Mobile App Development

  • 20% CMS

  • 10% Web Development

  • 10% Digital Marketing

  • 10% IT Services

  • 10% AI Development

  • 10% Cloud Computing Services

Digital Transformation experts

S Software Ltd. is an IT solutions company with headquarters in the UK that provides custom software and IT consultants. In order to assist businesses in overcoming their particular obstacles, we are also specialists in performance marketing, SEO, and digital marketing. Our objective is to offer customized solutions that meet your unique needs. We promise to significantly reduce your IT budget and management time if you hire us to develop, maintain, or improve your software.

View S SOFTWARE LTD Profile
Inside Service Listing

N/A

Hourly Rate
Inside Service Listing

$1,000+

Min. Budget Size
Inside Service Listing

50 - 249

Team size
Inside Service Listing

UK

Location

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 10% Software Development

  • 20% Ecommerce Development

  • 20% CMS

  • 10% Mobile App Development

  • 10% Web Development

  • 10% Web Design

  • 10% Digital Marketing

  • 10% Cloud Computing Services

Powering Your Ambition

Niteco, which was founded in 2010 by Swedish tech veteran Pelle Niklasson, has completed hundreds of projects for clients in over 30 nations. We have more than 300 professionals with a variety of backgrounds and specialties. Niteco is a strong believer in the value of a supportive community, a welcoming workplace, and the special fulfillment that comes from carrying out good deeds.

View Niteco Profile
Inside Service Listing

$50-$99/hr

Hourly Rate
Inside Service Listing

$10,000+

Min. Budget Size
Inside Service Listing

250 - 999

Team size
Inside Service Listing

UK

Location

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

17

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 10% Software Development

  • 20% Web Design

  • 20% Digital Marketing

  • 20% CMS

  • 10% Ecommerce Development

  • 10% Mobile App Development

  • 10% Web Development

Web Design & Digital Marketing

As a site design and digital marketing firm, we are dedicated to giving our customers strong and captivating online experiences. To help businesses thrive online, our team of professionals provides a wide range of services, such as web design, SEO, coding, programming, digital marketing, and more. Our purpose is to help our clients reach their objectives by offering them outstanding service, creative solutions, and superior outcomes. We work hard to provide distinctive site designs and digital marketing plans that will interest your clients and support your company's objectives. Our staff will put in a lot of effort to deliver tailored solutions that will propel your company to new heights because we are passionate about Web design, SEO, and digital marketing.

View Amber Business Solutions Profile
Inside Service Listing

N/A

Hourly Rate
Inside Service Listing

$1,000+

Min. Budget Size
Inside Service Listing

10 - 49

Team size
Inside Service Listing

UK

Location

2

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

2

SF Score

SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology

View Profile Visit Website
Services Provided
info
Expertise Distribution (%)
  • 20% Software Development

  • 20% Mobile App Development

  • 20% Web Development

  • 10% Web Design

  • 10% IT Services

  • 10% AI Development

  • 10% Product Engineering services

Boost Your Business with Custom Software Solutions

KnubiSoft: Your Premier B2B Technology Solutions Partner KnubiSoft stands out as a comprehensive technology solutions provider, specializing in creating exceptional software and innovative products tailored to meet your business needs. Our expertise spans the entire project lifecycle, including custom software development, team augmentation, intuitive UI/UX design, and rigorous QA testing. With a highly skilled team ready to elevate businesses of all sizes, we provide invaluable insights and technical proficiency. We cater to a wide array of industries, including Financial Services, Healthcare, E-Commerce, Logistics, and more. Our diverse knowledge base means that we can seamlessly integrate solutions across various sectors. Utilizing leading-edge technologies such as HTML/CSS, React, Java, Python, and Swift, KnubiSoft ensures that each deliverable is crafted to meet the unique demands of our clients. Our specialized services include end-to-end custom software development, legacy system support, cloud migration, and team augmentation to help organizations scale efficiently. Moreover, our proprietary product, Testlum, revolutionizes the QA process through automated testing, enhancing overall product quality while optimizing budgets. Trust KnubiSoft for standout technology solutions that drive growth and innovation in your organization.

View KnubiSoft Profile
Inside Service Listing

$25-$49/hr

Hourly Rate
Inside Service Listing

$25,000+

Min. Budget Size
Inside Service Listing

50 - 249

Team size
Inside Service Listing

UK

Location
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