Top C# Development Companies in London
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Explore Reviewed C# Development Companies in London — Find Skilled C# Developers for Your Project
Certain agencies may be featured through sponsored placements. Rankings and SF Scores remain unbiased and are based solely on our evaluation methodology.
17 Companies
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London
4.9 (16 Reviews)
58
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
58
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Engineering peace of mind
As a software development company with 20+ years in the field, Vention provides innovative services to startups and large enterprises. We tackle projects of any complexity and size, delivering outstanding solutions that help clients focus on business expansion and new opportunities. With 3K+ dedicated developers globally, we match clients with top engineering talent in time zones that align seamlessly with their unique needs. Our impressive track record: We've worked with 500+ industry-leading clients, including PayPal, IBM, Mount Sinai, PwC, and Postman Our work has contributed to $15B+ in client acquisitions. Clients typically save up to $600K annually with us. With an average client relationship exceeding 36 months, our enduring partnerships speak to consistent client satisfaction. Our longest client engagement has lasted 16 years. We provide end-to-end software development expertise, covering the entire engineering spectrum, from initial concept creation to final delivery and refinement. Custom software development Web and mobile development QA and testing Cloud & DevOps eCommerce AR/VR AI Blockchain
See all 9+ Portfolios
$50-$99/hr
$25,000+
1,000 - 3,000
London, UK
Verified Client Review
Mobile App Dev for Sports Tracking Platform
Reviewed by: Brent Varrall, Founder at AllGains View all 16 Reviews
4.8 (5 Reviews)
54
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
54
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Software Engineering Laboratory
SENLA is a fast-growing software development company with a proven track record and 5 EU locations. Our team of 700+ certified technical specialists and managers has large expertise in a full-cycle development from BA to maintenance as well as separate services like QA or UX Audit. For more than 10 years of operation we have successfully completed over 350 projects in FinTech, Healthcare, Manufacturing and other industries. Careful quality control, timely delivery and lifetime warranty have helped us win the loyalty of almost 90% of our clients who have decided to cooperate with us on a regular basis. Services: - custom software development - Web/mobile app development - IT staff augmentation - UX/UI Design - CRM consulting and SI - enterprise app modernization - BI& Big data consulting &SI Get in touch with us and scale your business fast and effortlessly
See all 31+ Portfolios
$25-$49/hr
$10,000+
500 - 1,000
London, UK
Verified Client Review
Staff Aug & Data Platform Dev for Agriculture Solutions Co
Reviewed by: Brian Faison, Business Controller at YARA GmbH & Co. KG View all 5 Reviews
4.9 (8 Reviews)
41
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
41
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Custom Software and Web Development Company
We are one of the most chosen IT firm that offers major solutions and puts forward the supreme effort to transform industries and generate the highest revenue. Ezulix Software Private Limited proves all mentioned qualities true being the best custom software and website development company in India. To create and grow the client's business and start-ups, a spectacular team of dedicated specialists is equipped with top-notch services. Ezulix Software offers services- Custom software development Website development Mobile app development (Android and iOS) Fintech software development and API services Food delivery and booking software Cab booking software development AEPS software Fantasy sport software CRM software Recharge software
View Ezulix Software Pvt Ltd Profile
N/A
$5,000 - $25,000
50 - 100
London, UK
Verified Client Review
Mobile App & Web Revamp & Maintenace for Car Manufacturer
Reviewed by: Bob Laishley, CEO at Caterham View all 8 Reviews
5.0 (4 Reviews)
38
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
38
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
High performance dedicated teams globally
We create specialised software development teams that grow businesses' technological proficiency. We collaborate with the top engineers in Eastern Europe to help you produce high-quality software more quickly than anybody else. All of our clients, who manage medium-sized to large-sized businesses in the US, Canada, Switzerland, Germany, the Netherlands, and ten other European nations, are willing to suggest Crunch as a reliable development partner.
View Crunch Profile
$25-$49/hr
$10,000+
50 - 249
London, UK
Verified Client Review
React Native Staff Augmentation for Technology Consulting Company
Reviewed by: Bob Visnov, CEO at Timegen Consulting View all 4 Reviews
0.0 (0 Reviews)
38
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
38
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Unique teams for unique companies
MWDN is a global all-in-one hiring service provider bridging the talent gap with top 5% experts across different time zones for companies of any size and stage in Israel, Europe, the USA, and Canada. We provide IT outstaffing, recruitment (headhunting) and flexible models like outstuff-to-hire for our partners already 23 years. We also customize our services for each client, and some of them have stayed with us for 17 years! Clients confidently rely on MWDN to hire or build teams in such industries as cybersecurity, healthcare, fintech, blockchain, logistics and 10 more. What we offer: ? Unlimited talent access worldwide and 200K+ vetted experts across every major tech stack, ready when you are ? The first 4–5 pre-qualified candidates within 1 week ? $6–7K saving per hire monthly on direct labor costs and other payment plans for tight-budget projects ? 23 years of expertise in 15 industries ? Full-cycle support: from headhunting to HR, payroll, legal & retention — everything an in-house team provides ? Risk-free collaboration: trial period and guaranteed replacement included We are about proven reliability: 23 years in business, 96% referral rate, 4.9/5 client satisfaction and global trust: 400 clients worldwide across 4 continents.
View MWDN Profile
$25-$49/hr
$25,000+
140 - 170
London, UK
5.0 (3 Reviews)
37
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
37
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Scale your business with world-class software
Scrums.com is the world’s 1st Software Engineering Orchestration Platform (SEOP) to help teams build faster, smarter, and at scale. We combine human expertise, AI-powered agents, and actionable software analytics into one flexible platform that orchestrates every aspect of software engineering. Whether you need to augment your team, spin up a dedicated development squad, or boost delivery with autonomous AI agents, Scrums.com gives you the control and scalability to move faster - and smarter. From startups to global enterprises, 400+ global companies trust Scrums.com to streamline engineering workflows, unlock talent from Africa’s top software minds, and drive performance through intelligent automation and insight. With presence in Johannesburg, Cape Town, Nairobi, Lagos, London, and New York, we’re building the future of software engineering - seamlessly orchestrated, insight-driven, and globally powered.
View Scrums.com (formerly SovTech) Profile
$50-$99/hr
$55,000 - $100,000
250 - 300
London, UK
Verified Client Review
Mobile App Dev for Digital Solutions & Consulting Company
Reviewed by: Asen Bahtev, Co-Founder at MNDB LLC View all 3 Reviews
0.0 (0 Reviews)
33
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
33
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Salesforce development and implementation consulting partner
Innovadel Technologies is a leading provider of innovative IT solutions, specializing in Salesforce implementation, integration, and support. We empower businesses across diverse sectors with cutting-edge technologies to drive digital transformation and achieve their strategic goals. Our comprehensive service offerings extend beyond Salesforce, encompassing Shopify, WordPress, BigCommerce, software development, custom application development, mobile app development, web development, Cloud Consulting, Data Analytics, and AI/ML Solutions. We are committed to delivering high-quality solutions, exceeding client expectations, and building long-term partnerships. Our deep industry expertise, focus on leveraging the latest technologies, results-oriented approach, and unwavering commitment to customer satisfaction set us apart.
See all 3+ Portfolios
$50-$99/hr
$10,000 - $15,000
50 - 60
London, UK
0.0 (0 Reviews)
29
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
29
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Generative AI Development and Consulting Company
ARCQ AI is a London-based consultancy specializing in generative AI software development and AI consulting services. We provide tailored AI solutions including machine learning, natural language processing, computer vision, and chatbot development to help businesses automate processes, gain insights, and enhance customer engagement.
View ARCQ AI Profile
$100-$149/hr
$25,000 - $50,000
1 - 9
London, UK
5.0 (5 Reviews)
29
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
29
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
We build products and teams that help companies grow
Four Ages offers complete software development solutions that are customized to meet the diverse business needs and technological objectives of its clients, ranging in complexity. Tech stack: > Back-end - JavaScript, PHP, Python, Java, Ruby on Rails, C/C++, .Net, Node JS > Front-end - React JS, Angular, Vue > Mobile - iOS, Android, Flutter, React Native > Databases - MongoDB, PostgreSQL, MySql, AWS DynamoDB, Firebase, Couchbase > Cloud - AWS, MS Azure, GCP
View Four Ages Software Profile
$25-$49/hr
$50,000+
10 - 49
London, UK
Verified Client Review
IT Consulting & Custom Software Dev for Ticketing Co
Reviewed by: Riley Allen, Product Owner at Ticketing Co View all 5 Reviews
0.0 (0 Reviews)
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
ON DEMANDS SOFTWARE TEAMS
We are a highly experienced and qualified team of professionals with a proven track record of delivering quality software solutions to clients. Here are a few reasons to choose us: 675+ software developers Expertise in different technologies Strong reputation for quality work Experience working on complex projects for different industry verticals ????At ValueCoders, we offer cutting-edge software solutions tailored to meet the unique needs of your business. Our goal is to empower businesses of all sizes with innovative technologies that streamline operations, deliver exceptional results, and drive growth.
View ValueCoders (UK) Profile
$300 </hr
$1,000 - $10,000
500 - 1,000
London, UK
0.0 (0 Reviews)
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
We are Mobile App Development Company
Inceptives Digital is your trusted partner for mobile app development in the US. With more than 8 years of experience and a talented workforce of 150+ developers, we’ve created 70+ high-performing apps across 20+ industries. Our mission is to help businesses transform ideas into powerful digital solutions that connect with users and deliver lasting value. Through AI-driven innovation, intuitive design, and a results-focused approach, we empower startups and enterprises alike to achieve their goals and thrive in today’s competitive digital landscape.
View Inceptives Digital Profile
$50-$99/hr
$500 - $50,000
50 - 99
London, UK
0.0 (0 Reviews)
27
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
27
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Creating Beautiful Designs & Wesbites
So-Creative is an award winning web design and development agency based in London. With a reputation for redefining digital experiences, they craft bespoke websites and cutting-edge software solutions that captivate audiences and deliver results. Their talented team combines creativity, collaboration, and advanced technology to help businesses develop memorable brands, generate leads, and achieve lasting success online. By offering streamlined, cost-effective processes, So-Creative is the trusted partner for businesses seeking to transform their digital presence and unlock growth through innovative design and technology.
View So-Creative Profile
N/A
$50+
11 - 50
London, UK
4.5 (3 Reviews)
4.5 (3 Reviews)
26
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
26
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
UDEVHUB
Our global software development company offers custom engineering solutions, based in Ukraine, with representative offices in various countries, including the USA, UK, Germany, Israel, Canada, Australia, and UAE.
View UDEV HUB Profile
$25-$49/hr
$25,000+
250 - 999
London, UK
Verified Client Review
IT Staff Augmentation for Medical Device Manufacturer
Reviewed by: Artem Malynovski, Co-Founder & CTO at Mawi Solutions View all 3 Reviews
4.8 (4 Reviews)
26
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
26
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
A CMMi Level 3 Company
It is one of the leading firms for providing solutions and services to Web Application Development. It utilizes technology to convert a vision into reality on web and mobile. The skilled developers are scalable and flexible to fulfill client requirements. It has a global reputation for delivering creative websites and mobile applications within time and budget. The goal is to combine quality web design development with offshore gains, to give online solutions and considering the latest economic downtrend issues away from clients. Whether you are a small-sized company looking to set up in the market, or a huge enterprise waiting for expansion, they can consider numerous solutions to guide in achieving the targets.
View Dotsquares Profile
$25-$49/hr
$5,000+
250 - 999
London, UK
Verified Client Review
CRM Consulting & Digital Marketing for Energy Company
Reviewed by: Mitchell Thomas, Operations Manager at Think Renewable View all 4 Reviews
5.0 (2 Reviews)
24
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
24
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
We create web and mobile apps that stand out.
Based in Maribor, Slovenia, and London, UK, Equaleyes Solutions is a multi-award-winning software development firm. In addition to developing, managing, and maintaining web platforms with millions of monthly users, we also create mobile digital products. Equaleyes has a clear understanding of the situation: You want a development partner who will take the time and money to truly consider your project and assist you reach your product goals. Equaleyes will provide your vision with the passion, commitment, and attention it need to reach its full potential if it is one of boldness, loyalty, and greatness.
View Equaleyes Solutions Ltd. Profile
$50-$99/hr
$1,000+
10 - 49
London, UK
Verified Client Review
Used them for multiple projects - always deliver
Reviewed by: Zoe Peden, Founder at Iris Speaks View all 2 Reviews
0.0 (0 Reviews)
19
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
19
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Designing. Building. Delivering
High Digital is a Cyber Essentials certified and ISO/IEC 27001 accredited data product developer. We design, build, and deliver data products. We adopt a collaborative and agile approach to cover all areas from product planning and design to UI/UX, development, delivery, and support. We have significant experience building Martech, SaaS, ESG, analytics, Bi, and logistics data products.
View High Digital Limited Profile
N/A
$5,000+
10 - 49
London, UK
0.0 (0 Reviews)
0.0 (0 Reviews)
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
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
$50-$99/hr
$10,000+
250 - 999
London, UK
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