Best C# Developers in the United States

4 Companies-Rankings updated: October 19, 2026

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.

United States × C# Development × Travel × $25,000 - $50,000 ×Clear Filters
  • AI/ML Consulting and Development Company

    Alltegrio specializes in Custom AI Solutions Development . Generative AI, Machine Learning, Computer Vision, AI Assistants Development, Natural Language Processing, OCR Data, Data Annotation all tailored to your unique business needs...

    Top Services:

    • AI Development
    • Software Development
    • Big Data Analytics
    • IT Services
    • Business Consulting
    • Show more
    Location
    Delaware City, Delaware
    Number of Employees
    100 - 249
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    20 Projects Listed

    Alltegrio Services

    • AI Development
    • Software Development
    • Big Data Analytics
    • IT Services
    • Business Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Real Estate
    • Retail
    • Healthcare
    • Fintech
    • Banking
    • Sport
    • Insurance
    Data sourced from the agency's DesignRush profile

    Alltegrio Reviews & Testimonials

    • Oksana Vobiachenko
      Oksana Vobiachenko CEO at Neohiring
      5.0★

      Big Data Consulting Review from Oksana Vobiachenko

      They worked on providing us with a comprehensive data architecture designed for scalability and security. A BI dashboard was created that allowed us to visualize key metrics from all our clients in one place, making it easier for us to get a comprehensive overview of our operations. They also set up real-time reporting capabilities that helped us respond to client needs faster and more efficiently. On top of that, Alltegrio recommended optimizations to our existing data pipelines, ensuring better data quality and improving decision-making. They also provided hands-on training for our internal team, ensuring we could manage and leverage the system without constant external support.

    • Yannick Berg
      Yannick Berg CTO at Arbillion
      5.0★

      Big Data Consulting Review from Yannick Berg

      Data Science and Analytics: Implemented models to enhance data-driven insights.Data Annotation: Optimized annotation processes for training models.Data Monetization: Developed strategies for extracting value from data assets.

    • Romit Karmakar
      Romit Karmakar Director at Capricon Technology
      5.0★

      Machine Learning Review from Romit Karmakar

      To develop an AI-powered trading bot capable of analyzing market data, identifying trading opportunities, and executing trades autonomously to maximize returns and minimize risks.

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

    Award WinnerRecipient of a Best Design Award for outstanding work.

    100% Focused on Apps

    We design and develop top-rated mobile and web apps for startups and SMEs. E-commerce, Healthcare, Marketplaces, and more. Our clients rate us for 5 out 5 - check out why!...

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Design
    • Design Services
    • AI Development
    • Show more
    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $45/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    32 Projects Listed

    Solveit Services

    • Mobile App Development
    • Software Development
    • Web Design
    • Design Services
    • AI Development
    • Web Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Hemie.se
    • RVista
    • Lifepal AB
    • Gumb
    • Jabal
    • MyRaceData
    • JobJob.md
    • Burger King
    • OIIO
    • Leviosa
    Data sourced from the agency's DesignRush profile

    Solveit Reviews & Testimonials

    • Mitya Smusin
      Mitya Smusin CEO at Yellow Systems
      5.0★

      Staff Augmentation Review from Mitya Smusin

      Solveit managed our comprehensive eCommerce project, developing a full-featured web platform with Node.js and React technologies. The agency also created a Flutter-based mobile app for seamless data synchronization across iOS and Android devices. We were thoroughly pleased with Solveit's expertise and adherence to deadlines. It provided timely updates and communicated openly about our project's status. Solveit's proactive approach and transparency were exceptional, particularly during the staff augmentation process, where the agency efficiently matched us with qualified candidates and facilitated a smooth onboarding. We were satisfied with Solveit's high-quality work and exceptional support.

    • Anna Harissis
      Anna Harissis CEO and Co-Founder at OUT CO
      5.0★

      Design Services Review from Anna Harissis

      They have an incredibly hardworking team at affordable pricing. SolveIt has built the app earlier than expected, and they continue to complete new tasks within the client's budget and timeline.

    • Gabriel Sabadin
      Gabriel Sabadin Founder & CEO at LifePal AB
      5.0★

      iPhone Review from Gabriel Sabadin

      We engaged SolveIt to develop a minimum viable product (MVP) app, including a user-friendly iOS design, an artificial intelligence (AI) model, and a monetization strategy while ensuring General Data Protection Regulation (GDPR) compliance and preparing for future integrations. Despite a tight deadline, SolveIt delivered the app on time and efficiently handled beta-testing within three months, allowing us to gather feedback and launch successfully. We acquired our first 1,000 users within a month of launching the app. SolveIt's team communicated effectively, addressed issues proactively, and maintained a high level of autonomy, bringing diverse expertise that greatly benefited our project. We appreciate the agency's dedication and professionalism.

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

    At Kaizen Softworks, were here to make your business thrive with custom software solutions. Our team is a blend of skilled designers, software engineers and scrum masters who are dedicated to transforming your business challenges and ideas into effective software solutions...

    Top Services:

    • Mobile App Development
    • Software Development
    • Software Testing
    • UI/UX Design
    • IoT
    • Show more
    Location
    Boston, Massachusetts
    Number of Employees
    50 - 99
    Average Hourly Rate
    $60/hr
    Minimal Budget
    $25,000 - $50,000

    Kaizen Softworks Services

    • Mobile App Development
    • Software Development
    • Software Testing
    • UI/UX Design
    • IoT
    • Staff Augmentation
    • Product Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • SmartSense by Digi
    • Blueport
    • CompTrain
    • SmartBorder
    • Livingston
    • CTM Travel
    Data sourced from the agency's DesignRush profile

    Kaizen Softworks Reviews & Testimonials

    • Mauricio Fleischer
      Mauricio Fleischer Dev Manager at CTM
      5.0★

      Software Development Review from Mauricio Fleischer

      Working with Kaizen has been an overall joy and I would highly recommend them to anybody starting or already maintaining a software project of any kind.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Accelone Advancing What's Possible

    Embark on your digital transformation journey with AccelOne's Software Development delivery model, strategically designed for optimal outcomes. Initiate your digital transformation seamlessly through our comprehensive nearshore and US-based services...

    Top Services:

    • Software Development
    • Mobile App Development
    • Blockchain
    • UI/UX Design
    • eCommerce Development
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    100 - 249
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    5 Projects Listed

    AccelOne Services

    • Software Development
    • Mobile App Development
    • Blockchain
    • UI/UX Design
    • eCommerce Development
    • Web Development
    • AI Development
    • Staff Augmentation
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • HSBC
    • Xapo
    • University of Washington
    • Pan American Energy SL
    • Cartoon Network
    Data sourced from the agency's DesignRush profile

    AccelOne Reviews & Testimonials

    • Gustavo Lemos
      Gustavo Lemos Review from Google
      5.0★

      Gustavo Lemos's Review Sourced from Google

      I've been working in AccelOne for several years already and it's an amazing place to work. Great people and a good variety of clients.

    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
128,556+
2

Portfolio Review

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

Applicants rejected
48%
3

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We monitor listings regularly; outdated agencies are removed.

Agencies verified
4

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