Best C# Development Companies

9 Companies-Rankings updated: October 19, 2026
C#

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

C# Development × Public Administration × Sort by: Top Rated ×Clear Filters
  • We transform Content into Games!

    We're an awarded serious games studio based in Florence specializing in designing and developing applied games and highly interactive multimedia experiences for educational projects, CSR activities, dissemination, training, and communication...

    Top Services:

    • Mobile App Development
    • VR/AR
    • Software Development
    • Creative Services
    • Digital Services
    • Show more
    Location
    Florence, Italy
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    9 Projects Listed

    WhiteSock Srl Services

    • Mobile App Development
    • VR/AR
    • Software Development
    • Creative Services
    • Digital Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Unicoop Firenze
    • Monogrid
    • Mirror
    • Sanoma
    • Giunti
    • Nerdo tv
    • Brandcross
    • Nume+
    • Università di Siena
    • Fondazione Villa Montesca
    Data sourced from the agency's DesignRush profile

    WhiteSock Srl Reviews & Testimonials

    • Paolo Lippi
      Paolo Lippi Production Manager at Nume+
      5.0★

      Gaming Review from Paolo Lippi

      In the past I had had the opportunity to appreciate Vincenzo's rare skills and when Nume Plus needed consultancy and a team capable of creating 3D and VR applications we had no doubts: WS was certainly the right interlocutor . In fact, he was able to interpret our needs and accompanied us throughout the entire construction process with attention and proactivity. In a complex area such as information technology, graphics and so-called new technologies, they have been able to combine creative invention, storyboarding ability and mastery of programming and graphics. It's not a little!

    • Laura Vaioli
      Laura Vaioli Manager at TheSign | Comics & Arts Academy
      5.0★

      Gaming Review from Laura Vaioli

      For TheSIGN Academy Whitesock is a precious partner. Not only because its founders and several team members are or have been teachers of game dev courses, but also because having a continuous comparison with an absolutely relevant player in the Italian gaming industry allows the academy to keep up to date on the needs of the industry, intercept trends and innovations related to the subjects taught in the courses and offer its students greater opportunities in terms of networking and professional opportunities. For those looking for a technological partner with high skills in game design and game development, I absolutely recommend Whitesock for its professionalism, reliability and enthusiasm.

    • Fabrizio Boldrini
      Fabrizio Boldrini General Director at Franchetti-Hallgarten Foundation at Villa Montesca
      5.0★

      Games Review from Fabrizio Boldrini

      The Villa Montesca foundation asked WS to develop an educational project on the topic of multi-religious school inclusion. To address this very specific topic, a game was created by mutual agreement that could allow boys and girls in schools across Europe to reflect on the topic of differences linked to the religion professed. It was a very positive experience which highlighted the professionalism of the developers and their ability to be flexible in a meeting with sector experts, among other things, bearers of different cultural and religious sensitivities. See the project on lifetwo.eu the game is called 40 answers.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • The missing ingredient in FinTech, InsurTech and HealthTech product development

    Any software developer can write code. Some create quality code. We build products that meet the market’s refined taste - since 2006.Code & Pepper helps to scale your product faster with expert engineers who are fully onboarded in 4 weeks and ready to build, integrate, and deliver from day one...

    Top Services:

    • Software Development
    • Mobile App Development
    • IT Services
    • Web Development
    • UI/UX Design
    • Show more
    Location
    Warsaw, Poland
    Number of Employees
    50 - 99
    Average Hourly Rate
    $70/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    4 Projects Listed

    Code & Pepper Services

    • Software Development
    • Mobile App Development
    • IT Services
    • Web Development
    • UI/UX Design
    • eCommerce Development
    • Web Design
    • AI Development
    • VR/AR
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Global Trade Alert
    • Smart Pension
    • Nimbla
    • DirectID
    • Finbourne
    • Dinarak
    • AZA Finance
    • Monkee
    • FlexFunding
    • Simudyne
    Data sourced from the agency's DesignRush profile

    Code & Pepper Reviews & Testimonials

    • Thomas McHugh
      Thomas McHugh Founder and director at LUSID (Finbourne)
      5.0★

      Software Development Review from Thomas McHugh

      We have used a variety of skill sets provided by Code & Pepper including UX design, development. We have also found using their Scrum process to be very beneficial to measuring the progress of the project. We are happy to recommend Code & Pepper as a partner.

    • Christian Schneider
      Christian Schneider Co-founder at Monkee
      5.0★

      Mobile App Development Review from Christian Schneider

      The team at Code & Pepper has been very responsive to our business needs since the beginning of our collaboration. When new requirements emerged, they were always both fast and diligent to provide us with candidates that fully met our teams’ requirements. Experts in specialized software development areas are always in high demand so having a competent partner by your side is a great help to move quickly as a start-up!

    • Johannes Fritz
      Johannes Fritz Project Manager, Ph.D at St.Gallen Endowment for Prosperity through Trade
      5.0★

      Software Development Review from Johannes Fritz

      The Code & Pepper team became involved in the process of designing the desired tool already at the bidding stage. They had a very practical approach from the very beginning and this is what made us select them. We could tell that Code & Pepper understood what we were about and had researched our existing site and the nature of its activity. Also, they had addressed the problems which we had with the original drafts of our contract in terms of timing and scope.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Marketing that advances your social impact and the common good.

    HelpGood is a full-service marketing and communications agency focused on social impact. Our clients are nonprofits, foundations, universities, government agencies, and purpose-driven organizations. HelpGood's offices are in Los Angeles and NYC. We are a certified B Corp...

    Top Services:

    • Web Design
    • Digital Marketing
    • Web Development
    • Branding
    • Show more
    Location
    New York City, New York
    Number of Employees
    Under 49
    Average Hourly Rate
    $175/hr
    Minimal Budget
    $50,000 & Up

    HelpGood Services

    • Web Design
    • Digital Marketing
    • Web Development
    • Branding
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Ad Council
    • Smokey Bear
    • FPWA
    • NEXT for AUTISM
    • Planned Parenthood of NYC
    • Fountain House
    • Native American Heritage Commission
    • National Forest Foundation
    Data sourced from the agency's DesignRush profile
  • The Digital Company

    With passion and innovative spirit, we advise and support companies and organizations in their very individual digital transformation. Alter Solutions Deutschland focuses on supporting its customers in the fields Cyber Security, Cloud & Infrastructure, Software Delivery, Business Performance and Agile IT...

    Top Services:

    • Software Development
    • Cybersecurity
    • Cloud Consulting
    • Big Data Analytics
    • Mobile App Development
    • Show more
    Location
    Dusseldorf, Germany
    Number of Employees
    50 - 99
    Portfolios Count
    5 Projects Listed

    Alter Solutions Deutschland GmbH Services

    • Software Development
    • Cybersecurity
    • Cloud Consulting
    • Big Data Analytics
    • Mobile App Development
    • Software Testing
    • Web Development
    • DevOps Consulting
    • IT Compliance Solution
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Automotive
    • Telecommunications
    • Financial Services
    • Transport & Logistics
    Data sourced from the agency's DesignRush profile

    Alter Solutions Deutschland GmbH Reviews & Testimonials

    • Naveen IK
      Naveen IK Review from Google
      5.0★

      Naveen IK's Review Sourced from Google

      Hello,I am very thankful to Alter Solutions GmbH, Deutschland for giving me the chance to work in Germany and trusting me in my role. The supportive work environment and the company’s focus on growth have made this experience very rewarding. It’s a pleasure to work with such a great organization.Special thanks to HR: Fabian Düesmann, Operations: Laura Thiel, and CEO: Thomas Fass.

    • B2B - Erklärvideo
      B2B - Erklärvideo Review from Google
      5.0★

      B2B - Erklärvideo's Review Sourced from Google

      We've had consistently positive experiences with Alter Solutions Germany. Questions and feedback were always answered reliably and comprehensively, and input was provided promptly. I definitely recommend All in One! The collaboration was successful and definitely a lot of fun. Thank you very much!

    • Birgit Brabeck
      Birgit Brabeck Review from Google
      5.0★

      Birgit Brabeck's Review Sourced from Google

      Digitalization partner with high technological expertise. Flexible approach. Project completion in time. Holistic approach. Absolutely recommended.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Delivering digital transformation - from consultancy and engineering, to AI, ML, cloud and UX

    Delivering digital transformation - from consultancy and engineering, to AI, machine learning, cloud and UX...

    Top Services:

    • Software Development
    • AI Development
    • Big Data Analytics
    • Cloud Consulting
    • Software Testing
    • Show more
    Location
    Leeds, United Kingdom
    Number of Employees
    100 - 249
    Average Hourly Rate
    $100/hr
    Portfolios Count
    2 Projects Listed

    Audacia Services

    • Software Development
    • AI Development
    • Big Data Analytics
    • Cloud Consulting
    • Software Testing
    • Staff Augmentation
    • DevOps Consulting
    • Mobile App Development
    • IT Services
    • UI/UX Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • AESSEAL
    • Techbuyer
    • Steris
    • National Institute for Health Research
    • Story Homes
    • Bellway Homes
    • ecar (a Europcar company)
    • ADM
    • Engie
    • Northern Trains
    Data sourced from the agency's DesignRush profile

    Audacia Reviews & Testimonials

    • Teodora Atanasoaei
      Teodora Atanasoaei Review from Google
      2.0★

      Teodora Atanasoaei's Review Sourced from Google

      I went to interview for a Delivery Manager role.Had 3 people interview me, one of which was dressed in sports outfit for the interview - I do not regard this as being professional.Second, the role advertised is not the same with the role itself. In the job description, the responsibilities were all related to Project Management, however when the interview started I was completely blindsided.They asked me to basically do the work of Sales, Product Owner, Design, Architecture and we spoke a little of Delivery as well.Only to be told later that because this is a consultancy, it's expected of you to do everything. The job does NOT pay for X5 roles with those responsibilities, but you are expected to do those tasks regardless.My advice - just write down all of these in the job advert, saves people time to decide whether it is suited for them or not.

    • Rass G
      Rass G Review from Google
      5.0★

      Rass G's Review Sourced from Google

      Fantastic company to work for, great people with a lot of knowledge and experience. Always work to a high standard.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your innovation partner for digitalization

    We are a Swedish/Bosnian award-winning agency specializing in IT outsourcing and end-to-end software development. With 85 experts on our team, we work with ventures and established companies to turn ideas into functional, high-quality products...

    Top Services:

    • Web Development
    • Mobile App Development
    • Software Development
    • IT Services
    • eCommerce Development
    • Show more
    Location
    Gothenburg, Sweden
    Number of Employees
    50 - 99
    Average Hourly Rate
    $60/hr
    Minimal Budget
    $10,000 - $25,000

    ZenDev AB Services

    • Web Development
    • Mobile App Development
    • Software Development
    • IT Services
    • eCommerce Development
    • Staff Augmentation
    • DevOps Consulting
    • Software Testing
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Arvid Nilsson
    • Kalmar
    • Northerner
    • Aktarr
    • Meela Health
    • Zynka
    • Avidnote
    • Hidroxa
    • Magnetlabbet
    • GreenFee365
    Data sourced from the agency's DesignRush profile
  • Empowering business success with custom software solutions

    Lindner IT specializes in developing industry-specific software solutions that empower enterprises. Using technologies such as SolidJS, Svelte, VueJS, Astro, ASP.NET Core, and Rust with Actix, our experienced team excels at both frontend and backend web development. Using our knowledge of Microsoft Azure and...

    Top Services:

    • Web Design
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • Software Development
    • Show more
    Location
    Igersheim, Germany
    Number of Employees
    Under 49
    Average Hourly Rate
    $75/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Lindner IT Services

    • Web Design
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • Software Development
    • Software Testing
    • WordPress Website Design
    • SEO
    • Managed Services
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Enterprise businesses
    • Medium sized businesses
    • Small businesses
    Data sourced from the agency's DesignRush profile

    Lindner IT Reviews & Testimonials

    • Denise !
      Denise ! Review from Google
      5.0★

      Denise !'s Review Sourced from Google

      I can only recommend Lindner IT to everyone.Robin Lindner always takes care of our various IT projects quickly and comprehensively. And if we ever had problems, he was usually able to fix them after a short time.Working together is fun and we don't regret our IT switch to Lindner IT in any way. On the contrary, we should have done this much earlier.Big thank you for the great support!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Coding Success Globally, Guided by a Ukrainian Heartbeat!

    We are Codebridge, an international team with a Ukrainian heart. We lead as an IT outsourcing company, offering software development, UI/UX design, app development, and web design solutions to European and US companies...

    Top Services:

    • UI/UX Design
    • Design Services
    • Product Design
    • Web Design
    • WordPress Website Design
    • Show more
    Location
    Wilmington, Delaware
    Number of Employees
    100 - 249
    Portfolios Count
    13 Projects Listed

    Codebridge Services

    • UI/UX Design
    • Design Services
    • Product Design
    • Web Design
    • WordPress Website Design
    • Web Development
    • Mobile App Development
    • Software Development
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • LOCAD
    • That Festival Site
    • KPMG
    Data sourced from the agency's DesignRush profile

    Codebridge Reviews & Testimonials

    • Ievgeniia Fedorenko
      Ievgeniia Fedorenko Review from Google
      5.0★

      Ievgeniia Fedorenko's Review Sourced from Google

      I have been working at the company for a year. One of my favorite things is the sense of community among coworkers; it feels like being part of a big, friendly family. Another aspect I appreciate is the professional growth opportunities. I am working on different projects where I can improve my skills and face new challenges.

    • Viktoriia Pchelintseva
      Viktoriia Pchelintseva Review from Google
      5.0★

      Viktoriia Pchelintseva's Review Sourced from Google

      I worked in Codebridge as a junior UX/UI designer. My team was really friendly and supportive, and I enjoyed working on the tasks with my colleagues. I also liked that the company is always ready to hear your feedback and that your opinion matters.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Smarter Solutions. Scalable Growth. Better Pricing

    SyncApp Technologies empowers businesses with smarter, scalable app and web solutions designed to transform workflows, enhance user experiences, and deliver measurable ROI. From architectural visualization platforms to AI powered assistants and enterprise integrations, we specialize in building future ready...

    Top Services:

    • Software Development
    • Web Development
    • Mobile App Development
    • IT Services
    • AI Development
    • Show more
    Location
    Ghaziabad, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed

    Syncapp Technologies Services

    • Software Development
    • Web Development
    • Mobile App Development
    • IT Services
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • RentalHost
    • MeandrEV
    • Voto Consulting
    Data sourced from the agency's DesignRush profile

    Syncapp Technologies Reviews & Testimonials

    • Virendra Singh
      Virendra Singh Review from Google
      5.0★

      Virendra Singh's Review Sourced from Google

      Our experience working with Sync App Technologies has been excellent and highly satisfying. Their team demonstrated professionalism, strong technical knowledge, and a clear understanding of our project requirements. Communication was smooth and transparent throughout the process, and they were always open to feedback and suggestions. It has been a pleasure working with them, and we look forward to collaborating again in the future

    • Kavita Singh
      Kavita Singh Review from Google
      5.0★

      Kavita Singh's Review Sourced from Google

      Absolutely amazing experience! The SyncApp team is knowledgeable, friendly, and delivers on time. Their quality of work is top-notch. Highly recommended!

    • Kumar Vishal
      Kumar Vishal Review from Google
      5.0★

      Kumar Vishal's Review Sourced from Google

      5/5 – Outstanding Experience with SyncApp Technologies!SyncApp Technologies has been exceptional from start to finish. Their team combines deep technical expertise with a strong commitment to delivering high-quality solutions. What truly stands out is their professionalism, attention to detail, and ability to understand client requirements perfectly.SyncApp Technologies is an excellent choice. Highly recommended!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
128,634+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
48%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
9

Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.

See how rankings and monetization work.