Top C# Development Companies

TouchZen Media

Verified

A boutique mobile app agency based in Orange County, CA, helping startups and growing companies design, build, and scale iOS, Android, and web apps.

5.0(42)

5.0

42 reviews

We’re more than a digital agency — we work as an extension of your team. From concept to launch, we design and build products that are functional, intuitive, and aligned with your goals. Since 2014, our focus has been on crafting experiences that feel effortless and meaningful for the people who use them — delivering results that stand out for their clarity and impact.

WD Strategies

Verified

Build a Powerful Digital Footprint

We’re passionate about helping businesses tackle a variety of challenges from the initial website setup to optimizing for online visibility, conducting online advertising campaigns, developing more efficient process, and more. Our team has experts who specialize in disciplines like web design/development, software engineering, marketing, SEO, SEM/PPC, integrations, multimedia development, and different financial focuses ranging from bookkeeping to job cost analysis, financial compliance, transfer pricing issues, and strategy consulting.

Fulminous Software

Optimize your company with our innovative and versatile technology solutions.

5.0(59)

5.0

59 reviews

Fulminous Software is a leading web development company, mobile app development company, and custom software development company delivering cutting-edge digital solutions globally. The company specializes in end-to-end digital product development services, including software consulting, product strategy, UI/UX design services, and MVP development. Fulminous Software offers a wide range of services such as mobile app development (Android app development, iOS app development, cross-platform app development), web application development, SaaS application development, and enterprise software development tailored to diverse business needs. The company also provides advanced solutions in AI development services, machine learning development, blockchain development, IoT development, AR/VR development, and game development services. In addition, Fulminous Software excels in eCommerce development, CRM development, ERP software development, and custom business software solutions, helping startups, SMEs, and enterprises accelerate their digital transformation journey. With a highly skilled team of software developers, UI/UX designers, QA engineers, and product consultants, Fulminous Software is committed to building scalable, secure, and high-performance applications. The company follows agile development methodologies, ensuring faster delivery and continuous improvement. Known for its flexible engagement models (dedicated developers, fixed cost, hourly hiring), transparent communication, strict NDA compliance, and client-centric development approach, Fulminous Software ensures every idea is transformed into a market-ready, user-friendly, and revenue-generating digital product at competitive pricing.

High Digital

Verified

Custom Data Solutions that Drive Business Growth

5.0(20)

5.0

20 reviews

High Digital is a Cyber Essentials Plus certified and ISO/IEC 27001 accredited data first digital partner. We design, build, and deliver data first products and solutions. We adopt a collaborative and agile approach to cover all areas from product planning and design to UI/UX, development, delivery, and support. We facilitate AI adoption in businesses by creating the platform, then we can support AI and ML initiatives that add real value We have significant experience building HSE, Martech, SaaS, ESG, analytics, Bi, and logistics data products.

The Blue Box

Your partner for automate intelligently. Scale confidently. Build beyond apps.

5.0(8)

5.0

8 reviews

At The Blue Box, we believe software should reduce complexity, automate work, and create real operational leverage. We partner with companies ready to move beyond manual processes and disconnected tools. From early MVPs to scalable platforms, we design and build intelligent digital systems powered by software and AI. Our approach is simple: understand your operations, identify automation opportunities, and build solutions that support long-term growth. No unnecessary complexity. No generic development. Just systems designed to scale. We work as your digital partner, helping you streamline processes, integrate AI thoughtfully, and build platforms that evolve with your business. The company serves as a long-term product partner for startups and scaling businesses in USA and LatAm, guiding them from initial validation through launch, growth, and optimization. Our client portfolio spans regulated and high-growth sectors including SaaS, FinTech, Healthcare, LegalTech, and EdTech, with HIPAA and GDPR compliance practices enabling us to operate confidently in compliance-sensitive environments.

Floating Dots

Connecting the dots between vision, product design, and custom software development behind successful web & mobile apps.

5.0(2)

5.0

2 reviews

Floating Dots is a product software development company founded in 2017, around a team of creative and enthusiastic people. Since then, we had successfully set up custom software services for companies with technological needs as well as start-ups. Our services are scalable so we can address the needs of businesses of all sizes. We are defined by our curiosity and passions. That’s why we are striving to ensure the high quality of the solutions we develop. The industries in which we have a deep understanding of the complexity of business processes are: - Education - Retail (e-commerce) - HR - Finance - Manufacturing - Healthcare - Social - Consumer products - Hospitality & Leisure We cover a complete set of services and abilities for for all stages of the software products lifecycle: - Web Development - Mobile Development - UI & UX Design - DevOps - Quality Assurance - Business Analysis - Technical Support Managing all the stages of the software lifecycle is what we do to ensure the success of your ideas: - ideation - architecture - design - development - quality assurance - operations - support

Dean Infotech

AI & Automation Specialist with hands-on CRM experts

Dean Infotech is a globally recognized cloud consulting and enterprise solution development company enabling organizations to accelerate digital transformation through Salesforce, HubSpot, AI, and scalable cloud technologies.

4Thought Marketing

Verified

Oracle Eloqua and Adobe Marketo consulting for B2B marketing teams, focused on strategy, integration, and privacy compliance.

4Thought Marketing is a specialized, remote-first marketing automation agency providing enterprise-grade automation, operations, and privacy compliance solutions to clients in North America, Latin America, Europe, and Asia. For over 15 years, we’ve helped organizations around the world optimize their marketing technology stack with deep expertise in Eloqua and Marketo platform implementation, migration, and ongoing optimization. Our certified marketing automation experts deliver comprehensive services including advanced campaign management, complex lead scoring and nurturing setups, CRM integrations, and multi-channel automation strategies across both Eloqua and Marketo platforms. We specialize in large-scale enterprise implementations, offering everything from platform migrations and custom dashboard development to ongoing account health audits and performance enhancement. As your dedicated marketing automation consulting partner, we provide tailored integration services, data segmentation, list management, and team training for both Eloqua and Marketo to ensure maximum platform adoption and ROI. Our proven track record includes managing complex enterprise implementations while maintaining the highest standards of regulatory compliance and data-driven customer engagement.

Vincit

Digital Development and Design Agency with strong AI capabilities

Vincit is a trusted partner for companies like Logitech, Cisco, The New York Times and LTK in developing their digital products and services. With roots in Finland and presence in the US since 2016 we are now over 500 experts ready to serve you. We combine meaningful user experience design to top-tier technical development for mobile, web and cloud. With the use of latest AI tools, we are able to deliver projects more efficiently and help your organization gain AI-Driven-Development capabilities throughout the collaboration. Ask us for free consultation and quote for your project. We are especially interested in challenging projects with established companies.

LinkSture

Bespoke eCommerce & Web Solutions That Drive Growth, Performance, and Long-Term Value

LinkSture is a bespoke eCommerce and web development agency helping brands, startups, and enterprises build scalable digital experiences that drive measurable growth. We specialize in custom Magento, Shopify, WordPress, and WooCommerce development — delivering high-performance, conversion-focused solutions tailored to each client’s business goals. Beyond development, we focus on strategy, UX-driven design, optimization, and long-term technical scalability. Our approach is simple: understand the business deeply, architect the right solution, and execute with precision. What sets us apart: • Performance-first development mindset • Clean, scalable, and maintainable code architecture • Strong focus on UX and conversion optimization • Deep eCommerce expertise across multiple platforms • Long-term partnership approach, not just project delivery We work closely with founders, marketing teams, and agencies worldwide to transform ideas into powerful digital commerce ecosystems. Whether it’s launching a new brand, scaling an existing store, or rebuilding complex infrastructure — LinkSture delivers solutions engineered for growth.

Prishusoft

Custom Web and Mobile App development company

Prishusoft is a global software development company that provides a wide range of solutions that include web and mobile app development, web design, e-commerce solutions and more. We have been developing custom business and enterprise applications for a long time, and our goal has always been to meet the needs of our clients. We also engage in offshore outsourcing software development to meet the needs of our global clients. Regardless of the location or nature of your business, be confident that we will meet its unique needs with our business and enterprise application development solutions. We provide purely customised web and app development services using powerful technologies such as Microsoft .NET, Angular JS, and React JS to provide highly satisfactory solutions while keeping your unique needs and budget in mind. We are here to help businesses at any level, from startups to enterprises. Our end goal is to make a difference. Our USP is that we love problems of any kind because our skilled team has solutions for them all, and if they don’t, they create one.

Our expert teams specialize in diverse technologies, delivering scalable, user-focused solutions across software and game development. On the software side, we provide custom web and mobile applications, API development, AR/VR experiences, and dedicated development teams that seamlessly integrate into existing workflows. In game development, we design and build engaging interactive experiences, from casual mobile games to complex educational and entertainment projects, always tailored for high performance, creativity, and player engagement. With every project, we focus on growth, efficiency, and long-term value, ensuring that our solutions help businesses innovate, scale, and stand out in their industry.

Code Neptune

AI, Web & Mobile App Development Solutions for Modern Businesses

Code Neptune Technologies is a software development company specializing in web development, mobile app development, and AI-powered solutions for businesses and startups. We help organizations build scalable digital platforms, modern applications, and intelligent systems that improve efficiency and support long-term growth. Our team focuses on creating reliable software solutions using modern technologies and best development practices. From building custom web applications to developing mobile apps and AI-powered tools, we work closely with clients to transform ideas into practical digital products. Code Neptune Technologies aims to help businesses strengthen their digital presence by delivering secure, high-performance, and scalable software systems designed for the evolving technology landscape.

NetLS

NetLS is a .NET development center specializing in FinTech solutions powered by artificial intelligence.

NetLS is a .NET development center specializing in FinTech solutions powered by artificial intelligence. They provide custom software development using C#, ASP.NET Core, JavaScript, and Python libraries, delivering E-commerce platforms, ERP systems, and mobile applications with expertise in Azure cloud technologies and Power BI integration.

Fantom Corporation is a minority-owned systems engineering and software development company specializing in technical services for Defense and Intelligence Community clients. They provide systems engineering, integration, software development, program management, and IT solutions, with expertise in technologies including AWS, Angular.js, Scala, MongoDB, Oracle, JAVA/J2EE, and Agile methodologies.

Creative Software

Your Growth Powered By ‍Our Expert Tech Teams

Founded in 1999, Creative Software is a software engineering partner that helps enterprises across Scandinavia (Sweden, Norway, Denmark) and Europe build and scale digital products through dedicated high-performing engineering teams and global delivery through a team of 550+ professionals enabling long-term technology partnerships and scalable delivery models. We specialize in custom software development, digital engineering, web solutions, and IFS consulting services, supporting organizations in delivering scalable, high-performance digital solutions.

UNL Solutions is a software development consultancy that specializes in providing dedicated development teams and IT staff augmentation services. They offer custom software development, mobile app development, quality assurance, and IT consulting across technologies like Angular, Node.js, Java, .NET, PHP, and machine learning/AI, serving clients in the US and Europe with 18 years of experience and 98% client satisfaction.

Webashlar is a full-service IT development company based in Surat specializing in AI-driven solutions, AR/VR development, and metaverse applications. They provide comprehensive services including custom software development with .NET/C# and React, 3D design, ArcGIS geospatial development, game development using Unity, and enterprise cloud services.

Full Scale is an offshore software development company that provides dedicated senior engineers from the Philippines who integrate directly with US tech teams. They specialize in staff augmentation across modern technology stacks including Node.js, Python, React, Angular, and mobile platforms, offering vetted engineers who work within clients' existing workflows and sprint cadences.