Best C# Developers in the United States

5 Companies-Rankings updated: September 03, 2026

Every agency featured on DesignRush is vetted for expertise and client satisfaction to support your decision-making. Some listings may be sponsored.

United States × C# Development × Pets × Sort by: Number of Reviews ×Clear Filters
  • Vention

    VerifiedVerified by the DesignRush team for authenticity and credibility.

    Engineering peace of mind

    Vention builds custom software across fintech, healthtech, and eCommerce, for clients like ClassPass, Mount Sinai, and Slice. Its ISO 27001-certified team serves 30+ industries and over 500 clients. With 20+ years of experience, the software development firm is best for businesses needing scalable...

    Top Services:

    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Software Testing
    • Web Development
    • Show more
    Location
    New York City, New York
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    15 Projects Listed

    Vention Services

    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Software Testing
    • Web Development
    • Blockchain
    • AI Development
    • Cloud Consulting
    • CRM Consulting
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • IBM
    • PayPal
    • Cuvva
    • Costa Coffee
    • Memrise
    • Urban
    • Tailored Dog Food Delivery
    • RealVNC
    • Label on a Cable
    • ClassPass
    Data sourced from the agency's DesignRush profile

    Vention Reviews & Testimonials

    • Lee Tupper
      Lee Tupper CTO at Remotiv (formerly Financial Soundings)
      3.8

      Mobile App Development Review from Lee Tupper

      Vention has delivered excellent design prototypes and accurate time estimates. The app is still in beta mode, and the partnership with [...] Vention will [continue] until the release of the next version. Vention is a reliable team that offers quality service. (Verified via email)

    • Jon Wade
      Jon Wade CTO & Founder at Union54
      5.0

      Staff Augmentation Review from Jon Wade

      Vention’s efforts allowed the successful development of the product, resulting in new customers. They provided backend developers, business analysts, UI designers, and QA testers to develop our solution. Vention cultivated a seamless partnership through constant updates and a collaborative approach. Overall, their team’s well-rounded expertise was impressive.

    • AJ Canty
      AJ Canty CTO and Co-Founder at Primer
      5.0

      Web Development Review from AJ Canty

      We’ve been working with Vention for quite some time and consider them an extension of our team, rather than an offshore vendor. We needed solid mobile developers to work with our in-house engineers to build our Primer SDKs on both mobile platforms. This was not a trivial thing as it required a lot of cross-functional communication, but the Vention team was up to the challenge. They quickly adopted the best practices we follow at Primer and proved to be effective and proactive.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Don't Just Be Sure, Be Sycosure

    We're a family-owned company in Southern California that strives to provide effective online marketing solutions and business processes that we tailor for the individual needs of each business...

    Top Services:

    • Web Design
    • Business Consulting
    • Graphic Design
    • Web Development
    • Show more
    Location
    La Quinta, California
    Number of Employees
    Under 49

    Sycosure Services

    • Web Design
    • Business Consulting
    • Graphic Design
    • Web Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Black Hat World
    • DotCom Consultancy
    • Southwest Tax Associates
    • Tsakanikas Law
    • Exotic Birds Unlimited
    • Bavarian Auto Repair
    • Rockeys Locksmith
    Data sourced from the agency's DesignRush profile
  • Custom Websites, Software, Branding, and Digital Marketing for Small-to-Midsize Businesses.

    You know where youd like your company to go. We can help you get there by solving problems with strategy, creativity, and technology. Its not just about writing code - its about designing and implementing the right strategy and solution for your specific needs...

    Top Services:

    • Web Design
    • Web Development
    • Software Development
    • Digital Strategy
    • Mobile App Development
    • Show more
    Location
    Wrentham, Massachusetts
    Number of Employees
    Under 49
    Average Hourly Rate
    $65/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Bytewise Design Services

    • Web Design
    • Web Development
    • Software Development
    • Digital Strategy
    • Mobile App Development
    • eCommerce Development
    • Branding
    • Logo Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • John Deere
    • Epicor
    • Alex and Ani
    • HostGator
    Data sourced from the agency's DesignRush profile
  • Sketch Development Services

    VerifiedVerified by the DesignRush team for authenticity and credibility.

    Build it. Run it. Own it.

    Sketch delivers AI-enabled custom software and DevOps via a subscription model with two-week delivery cycles, citing zero missed deadlines. Its team serves Fortune 500 clients and is best suited for product teams needing a transparent, agile dev partner without long-term contracts...

    Top Services:

    • Software Development
    • Cloud Consulting
    • UI/UX Design
    • eCommerce Development
    • DevOps Consulting
    • Show more
    Location
    St. Louis, Missouri
    Number of Employees
    Under 49
    Minimal Budget
    $50,000 & Up

    Sketch Development Services Services

    • Software Development
    • Cloud Consulting
    • UI/UX Design
    • eCommerce Development
    • DevOps Consulting
    • Staff Augmentation
    • AI Development
    • Software Testing
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • U.S. Bank
    • Centene Corporation
    • Maritz
    • Change Healthcare
    • Stifel
    • Reinsurance Group of America (RGA)
    • bioMerieux
    • CareSource
    • CENTEGIX
    • Purina
    Data sourced from the agency's DesignRush profile

    Sketch Development Services Reviews & Testimonials

    • Monica
      Monica Review from Google
      5.0

      Monica's Review Sourced from Google

      Amazing and talented people. I’ve worked for both client and agency side and can can say their partnership is amazing. They truly care about ongoing operations and not just ending it at a project level. Highly recommend! Message me if you want specifics.

    • John Andesilich
      John Andesilich Review from Google
      5.0

      John Andesilich's Review Sourced from Google

      I own a marketing firm in Troy MO and I recently met with Calvin at Sketch Development Services to discuss a software development project I have been thinking about pursuing. He was very nice, easy to speak to and even though his field is a bit out of my knowledge base, he was able to explain things in a way that made perfect sense. I look forward to working with him and his team in the future and recommend anyone looking for a software or app development company to give them a try.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Ignite What's Next

    Sparkware Solutions is a Virginia-based digital agency that helps small businesses grow faster, operate leaner, and scale smarter through strategic web development, AI-driven automation, and intelligent marketing systems...

    Top Services:

    • Digital Marketing
    • AI Development
    • Web Development
    • Mobile App Development
    • Show more
    Location
    Richmond, Virginia
    Number of Employees
    Under 49
    Minimal Budget
    $1,000 - $10,000

    Sparkware Solutions Services

    • Digital Marketing
    • AI Development
    • Web Development
    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Hollywood Records
    • Tadaima Rolls
    • Sundarri
    • Availio
    • Cazcarro
    • RSSence
    • KitKatCakes
    • Vanessa Aragon
    • Black Cherry Art
    • Barklenciaga
    Data sourced from the agency's DesignRush profile

    Sparkware Solutions Reviews & Testimonials

    • K Fortune
      K Fortune Review from Google
      5.0

      K Fortune's Review Sourced from Google

      Silver Spark Studio took my initial ideas brought them to life. They were attentive, the process was collaborative, and they were receptive to my feedback and made changes as needed. They helped me navigate a critical planning stage in my small business and I will continue to consult with them for future steps.

    • Y. O.
      Y. O. Review from Google
      5.0

      Y. O.'s Review Sourced from Google

      Silver Spark delivered focused, constructive feedback that helped us see where the experience was falling short and where it was on the right track. They called out usability issues like the floating, unclickable cookie banner and lack of navigation back to the main site from portfolio demos—both small things that impact trust and flow. Their suggestion to replace client logos with actual work mockups shifted our perspective on how to better showcase our value. They also emphasized how underwhelming the hero section felt and encouraged us to treat it with the weight it deserves as a first impression. On the positive side, they acknowledged our strong branding and clear communication, and gave a nod to our solid SEO and best practices. Their tip to expand the FAQ as a low-effort SEO boost was especially helpful. Overall, the feedback was thoughtful, to the point, and gave us a practical path forward.

    • Arbaz Riaz
      Arbaz Riaz Review from Google
      5.0

      Arbaz Riaz's Review Sourced from Google

      Working with Silver Spark was a great experience. They took the time to really understand our goals and challenges, and their UX advice was both strategic and practical. Their guidance helped us move the project forward with confidence. Throughout the process, they were professional, responsive, and clearly dedicated to delivering quality.

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

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