The Best C Sharp (C#) Software Development Companies in NYC

Looking for a top C Sharp software development company in New York City?

The programming language C Sharp (C#), is general-purpose and used for web and mobile apps. It has a number of advantages: It's object-oriented, has automatic garbage collection, functions across platforms, has backward compatibility, and integrates well with other platforms and services.

To assist you in your search for a partner, we’ve compiled this list of the top C# developers in New York City. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.

List of the Best New York City C Sharp (C#) Software Development Companies

  • 1

    DOOR3

    DOOR3 is a software development company headquartered in New York, NY. Founded in 2002, DOOR3 has grown to a team of about 60 employees that serves mostly enterprise and mid-market business. They provide software, web, and mobile app development, UX/UI design, and enterprise app modernization.

    Notable Project

    DOOR3 partnered with a medical device company to help in the planning phase of redesigning three websites. DOOR3 was involved with the research and discovery phase, helping the client identify the information needed on each site, content infrastructure, and navigation. All three websites were created on Drupal but DOOR3 was not involved in that phase of the project.

    “We selected them because we felt, during the presentation, that they had a really strong user experience approach, and I think the output that we had on the site definitely validated that.” – Former Digital Marketing Manager, Medical Device Company

    Former clients
    HP
    Morgan Stanley
    FreshDirect
    AIG
    $ $ $ $ $
    equalizer $25,000+
    group50 - 249 Employees
    place New York, NY
    4.9
    4.9
    24 Clutch reviews
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  • 2

    DataArt

    DataArt is a software engineering firm in München, Germany; Zug, Switzerland; London, England; and New York. Founded in 1997, they have about 3,000 employees that serve mainly midmarket and small-business clients in the financial, healthcare, and IT sectors. Services include custom software development, enterprise app modernization, and UI/UX design.

    Notable Project

    DataArt provided QA services for a financial institution. In order to help facilitate a smooth transformation, their team tested credit card payments, billing, and other automated functionalities. Their work has received positive feedback and helped detect bugs and issues.

    “The substantial parts are that they’re really transparent and responsive.” – VP & CTO, Financial Institution

    Former clients
    Apple Leisure Group
    Cancer Research UK
    Nasdaq
    Credorax
    Ocado
    $ $ $ $ $
    equalizer $50,000+
    group1,000 - 9,999 Employees
    place New York, NY
    5.0
    5.0
    12 Clutch reviews
  • 3

    Bitbean.com

    Bitbean.com is a software engineering firm based in Lakewood, N.J. and founded in 2011. Their team of 28 employees specialize in custom software, web, and mobile app development for primarily midmarket clients in the business services, real estate, and financial services industries.

    Notable Project

    Bitbean.com built a website for an educational media company. After receiving an unsatisfactory product from another source, the client hired Bitbean to remake the site from scratch. They remade the site, integrating specific content delivery services and being careful to preserve features of the old site which users had come to expect. The client was impressed with the quality of the product and with their professionalism during the project.


    “The level of skill, professionalism, and passion they bring to the table is noteworthy. We never felt like this was just another project to them.” – CEO, Educational Media Company

    Former clients
    Eastern Union
    Riverside Abstract
    CardCash.com
    $ $ $ $ $
    equalizer $25,000+
    group50 - 249 Employees
    place Monsey, NY
    5.0
    5.0
    10 Clutch reviews
  • 4

    Zco

    A tech frontrunner since 1989, Zco is a full-stack app development firm offering web, mobile, and animation services. Headquartered in Nashua, New Hampshire with a Boston office, the 200+ specialists comprise a powerhouse team with outstanding and varied proficiencies.

    Notable Project

    Zco developed an app for both iOS and Android to showcase the products of a large electrical parts manufacturer. Their prompt turnaround and response time, competitive pricing, and immaculate deliverables resulted in an experience that was “overwhelmingly positive.”

    "Their technical expertise is spot-on and they're highly responsive, even post-launch." – Senior Product Manager, Manufacturing Company

    Former clients
    BBC America
    Liberty Mutual
    Microsoft
    Samsung
    Verizon
    $ $ $ $ $
    equalizer $10,000+
    group250 - 999 Employees
    place New York, NY
    4.8
    4.8
    42 Clutch reviews
  • 5

    Codibly

    Codibly is a consulting and software development company based in Krakow, Poland. Founded in 2011, the team of 29 specializes in custom software development, web development, and mobile app development.

    Notable Project

    Codibly worked on an online platform for an insurance firm. Within a two-week period, they utilized existing wireframes to create a usable product. The client was impressed with the quality of work they delivered.

    “The quality is extremely high and the turnaround was very fast. If we had any issues, Codibly provided a solution. They’re exactly the kind of project team I needed, and the functionality and reliability of the portal is solid.” – Open Market and Facultative Manager, Insurance Firm

    Former clients
    MyShowcase
    KiWi Power
    PA Consulting Group
    $ $ $ $ $
    equalizer $10,000+
    group50 - 249 Employees
    place New York, NY
    4.7
    4.7
    15 Clutch reviews
  • 6

    Bit by Bit Computer Consultants

    Bit by Bit Computer Consultants is a 54-person IT firm founded in 1987. With headquarters in New York, they offer IT managed services, cybersecurity, custom software development, and other IT consulting & SI. They serve small and midmarket businesses in the financial, legal, and nonprofit industries.  

    Notable Project

    A law firm hired Bit by Bit Computer Consultants to revamp their IT systems. They introduced a hybrid-cloud structure and enabled users to access file revisions remotely. The client is pleased with the company’s ongoing IT support. 

    “They solve a problem’s root cause so it doesn’t become an issue again, and they constantly reflect on their own performance, conducting quarterly business reviews with us and discussing our future plans and growth goals so as to proactively address our IT needs.” – Partner, Law Firm 
     

    Former clients
    Seward & Kissel, LLP
    Northern Fund Management
    Goetz Fitzpatrick LLP
    Las Colinas Symphony Orchestra
    Centers for Medicare and Medicaid Services (CMS)
    Bleakley Financial Group
    $ $ $ $ $
    equalizer $5,000+
    group50 - 249 Employees
    place New York, NY
    4.9
    4.9
    23 Clutch reviews
  • 7

    lilcodelab

    lilcodelab is a software engineering company headquartered in Split, Croatia with additional offices in Munich, Germany. Founded in 2017, they currently have a team of 9 that specializes in custom software and web development as well as enterprise app modernization. lilcodelab works with clients of all sizes within the business services, financial services, and government industries.

    Notable Project

    lilcodelab developed a hybrid Android app that connected craft beer enthusiasts with vendors. The team was responsible for designing the UX and adding core functions, including location-based components and push notifications. Users lauded the app for its intuitive, easy-to-use features.

    "They are insightful and give us valuable feedback from an Android perspective." — Lead Developer, Beer Company

    Former clients
    NHS England
    Sarahah
    Cezar
    iSchool
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place New York, NY
    4.8
    4.8
    4 Clutch reviews
  • 8

    AndPlus

    AndPlus is a software product development company located in Southborough, Mass. Founded in 2009, they have 50 employees and serve companies of all sizes – from Fortune 100 companies like Bloomberg and Honeywell, to funded startups looking to launch their MVP. AndPlus focuses on creating mobile and web solutions for IoT, Big Data, User Experience, Artificial Intelligence, Machine Learning, and more.

    Notable Project

    AndPlus developed a web application for a risk management system for financial institutions and publicly traded companies. Throughout the development process, the team worked closely with product owners to understand the needs and develop major features and enhancements that were rolled out in the first version in 2015. AndPlus still supports the software throughout its lifecycle.

    “I was very impressed that they were flexible to change their work methodology to fit what our needs were. ... They were always willing to change everything at the drop of a dime to make sure that they satisfied our needs. We profited from that type of relationship.” – Senior Project Manager, Data Management Analytics Company

    Former clients
    Bloomberg
    Cognex
    ESPN
    Harvard School of Public Health
    Honeywell
    $ $ $ $ $
    equalizer $25,000+
    group50 - 249 Employees
    place Livingston, NJ
    4.9
    4.9
    21 Clutch reviews
  • 9

    Jahnel Group, Inc.

    Jahnel Group, Inc. is an application development company based in Schenectady, N.Y., with offices in New York and Plano, Texas. The company, founded in 2012, has around 90 employees and provides custom software development, web development, mobile app development, and UX/UI design services. Jahnel Group, Inc. serves midmarket and other-sized companies and institutions in the business services, financial services, gaming, education, manufacturing, medical, and e-commerce industries.

    Notable Project

    A healthcare startup hired Jahnel Group, Inc. for an ongoing engagement to act as its on-shore product development team. In particular, Jahnel Group, Inc. handled both cloud infrastructure automation and management (AWS infrastructure managed via CDK), as well as front-end and back-end web development in the startup's serverless stack (React for the front end, API-Gateway / Lambda / Python / DynamoDB for the back end). Because of this engagement,  the startup was able to develop its MVP on time and, later, successfully launched the application. The app was well-received by patients and providers and enabled the startup to grow its business and revenue.

    "The company leadership sets an amazing tone for the entire team - they truly care about helping their customers make great things happen." - CTO, Healthcare Startup

    Former clients
    Google
    MIT
    Atos
    Bethesda
    $ $ $ $ $
    equalizer $5,000+
    group50 - 249 Employees
    place New York, NY
    5.0
    5.0
    3 Clutch reviews
  • 10

    Damco Solutions

    Damco Solutions is a software development and product engineering company, founded in 1996. They employ 401 staff across their offices in London, Luxembourg, India, and New Jersey, where they provide custom software and mobile app development, AI, business analytics, and QA. They work predominantly with small, mid-size and large companies in finance, business services, and IT.

    Notable Project

    Damco Solutions developed a user interaction platform for an insurance company. They built out capabilities for claims adjustment, payment terminal management, and customer service. The platform delivered by Damco Solutions was executed flawlessly, increasing subscriptions immediately and maintaining product integrity through scaling.

    “The product we received was flawless, robust and scalable and thus we have gained a good number of monthly subscriptions which was beyond the numbers we expected.” – Product Manager, Insurance Company

    $ $ $ $ $
    equalizer $5,000+
    group1,000 - 9,999 Employees
    place Princeton`, NJ
    5.0
    5.0
    9 Clutch reviews
  • 11

    Incredible Visibility Inc.

    Incredible Visibility Inc. is a multidisciplinary agency founded in 2014 and headquartered in Parkland, Fla. with secondary offices in Torrance, Calif. and Kollam, India. Their 50+ employees specialize in web and custom software development, e-commerce solutions, web design, UI/UX, and more, serving small and mid-sized clients in various industries.

    Notable Project

    Incredible Visibility Inc. provided web development, SEO, and social media marketing for a health clinic that needed a digital upgrade. They created a new website and set up marketing campaigns on Yelp and Google. Their efforts produced an uptick in appointments for the client, who was pleased with all of the deliverables but especially with the SEO results.

    "We’re now one of the largest private mental healthcare facilities in the entire southern Los Angeles area..." – IT Manager, Health Clinic

    Former clients
    Motor Trend
    Federal Premium
    Sand Cloud
    $ $ $ $ $
    equalizer $10,000+
    group50 - 249 Employees
    place Manhattan,, NY
    5.0
    5.0
    2 Clutch reviews
  • 12

    Futran Solutions

    Futran Solutions is a digital solutions provider located in Edison, N.J. They were founded in 2012, and have a team of 65 employees who specialize in custom software development, AI, and big data consulting to help their clients use the latest technologies and techniques to grow and succeed.  

    Notable Project

    Futran Solutions developed a pair of mobile apps and a web app for a student services platform. They used Node.js and Wordpress to make apps for iOS, Android, and the web that allow users to find the services they need. The client was happy with the product, and was impressed with how fast Futran was able to deliver the product

    “With Futran Solutions, we received an end-to-end solution. We made a great decision choosing Futran Solutions.” – Digital Marketing Manager, Student Services Platform
     

    Former clients
    Becton
    Penn National Insurance
    United Parcel Service
    $ $ $ $ $
    equalizer $25,000+
    group250 - 999 Employees
    place Edison, NJ
    5.0
    5.0
    1 Clutch review
  • 13

    Digital Edge Ventures

    Digital Edge Ventures is an IT services company based in Staten Island, N.Y. Founded in 1996, the team of 13 specializes in cloud consulting and SI, cybersecurity, and custom software development. They work primarily with small business clients, mainly in the financial services industry.

    Notable Project

    Digital Edge Ventures worked on cybersecurity consulting for a financial technology company. They supported security controls for a variety of internal Linux projects. They also developed technical solutions to achieve ISO certification. The client appreciates their work and feels more confident in the security of their network.

    “Their depth of technical capability is great. They have some really phenomenal technical people working for them. The flexibility of their solutions is also impressive.” – VP of IT, Financial Technology Company

    Former clients
    Macy’s
    March of Dimes
    NYC Health + Hospitals
    $ $ $ $ $
    equalizer

    Undisclosed

    group10 - 49 Employees
    place Staten Island, NY
    4.9
    4.9
    8 Clutch reviews
  • 14

    Incipient Corp.

    Incipient Corp. is a software development group based in Rutherford, N.J., and founded in 2011. Their team of fewer than 50 provides custom software development, cloud consulting, and IT strategy consulting solutions for clients in the industries of manufacturing and business services.

    Notable Project

    Incipient Corp. developed a mobile and web app for a pharmaceutical company. The app was already developed, but the company needed assistance in creating a mobile port. The company is satisfied with Incipient Corp.’s work on the app.

    “We asked them to deliver on a technology stack that’s based on our requirements, which they performed well.” - Director of IT Business Apps, Pharmaceutical Company

    Former clients
    Amneal Pharmaceuticals
    Shadow Delivery
    Billy Joe’s Ribworks
    $ $ $ $ $
    equalizer $25,000+
    group10 - 49 Employees
    place Rutherford, NJ
    5.0
    5.0
    9 Clutch reviews
  • 15

    NIFTIT

    NIFTIT is a design and development agency based in New York, with an office in Ho Chi Minh City, Vietnam. The agency, founded in 2013, has a team of around 20 that provides, among others, ECM consulting & SI, IT managed services, and applications management & support services to various organizations, institutions, and companies. 

    Notable Project

    NIFTIT was hired by a B2B Food Flavoring Company to develop SharePoint-based workflows and an intranet setup for company-wide communications. NIFTIT was able to deliver these and made an exceptionally positive impact on the Company. 

    "They always met the timeline deadlines, even when we had change requests." - IT Manager, B2B Food Flavoring Company 

    Former clients
    New York Metropolitan Transportation Council
    The Sports & Arts in Schools Foundation
    Viedam
    Lone Star Analysis Inc.
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place New York, NY
    5.0
    5.0
    5 Clutch reviews
  • 16

    BLUEPORTAL, LLC

    BLUEPORTAL, LLC is an IT company founded in 2015 and run by more than 10 people. Based in New York, they offer custom software, web, and mobile app development solutions, primarily to small and mid-market clients in the fields of financial services, health care, and e-commerce.

    Notable Project

    BLUEPORTAL, LLC developed a web app for a counseling company. The company needed a web app that had a frontend, a backend with API, and a content management system. Their work allowed the company to obtain a significant local presence online.

    “The project management was impressive and responsive to my questions and suggestions.” – Owner & Psychotherapist, Counseling Company

    Former clients
    Areale Counseling & Wellness, LLC
    YouDivine
    Valley of Rockville Centre AASR
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place New York, NY
    5.0
    5.0
    2 Clutch reviews
  • 17

    Armix Group

    Armix Group is a digital strategy agency based in New York. This company has 10+ emploees and was founded in 2006. Services offered by Armix Group include SEO, mobile app development, and web development.

    Notable Project

    Armix Group provides ongoing web design and digital marketing services for an art history non-profit. They make use of sustainable SEO solutions to draw attention to the client's site. The client reports strong trends and satisfying growth rates since it began working with Armix Group.

    "I’ve worked with many SEO specialists and web developers. Armix Group looks at the right metrics and handles itself with professionalism. They combine the functions of an SEO shop and a digital marketing agency. That’s pretty rare in the marketplace." Founder, Art History Non-Profit

    Former clients
    Barnes&Noble
    Intuit
    MetLife
    $ $ $ $ $
    equalizer $1,000+
    group2 - 9 Employees
    place New York, NY
    5.0
    5.0
    5 Clutch reviews
  • 18

    The Smyth Group

    The Smyth Group is a digital agency founded in San Diego in 2005. Their team of more than 10 specializes in UX/UI design, custom software development, and web development solutions for mid-market and enterprise-level clients.

    Notable Project

    The Smyth Group developed a mobile app for a B2B marketing agency. The app was to function as a sales enablement tool. The project was successful, but the agency’s client decided to shift the direction of the project afterwards.

    “Awesome! Great communication throughout the process, with easy collaboration and guidance along the way.” - Founder & CEO, B2B Marketing Agency

    Former clients
    UviaUs
    $ $ $ $ $
    equalizer $25,000+
    group10 - 49 Employees
    place New York, NY
    5.0
    5.0
    10 Clutch reviews
  • 19

    Exigent Technologies

    Exigent Technologies is a full-service information technology consulting firm headquartered in Mount Arlington, N.J., with a satellite office in New York. Exigent's team of 50+ employees looks to offer IT managed services, custom software development, and cybersecurity to small and midmarket businesses. 

    Notable Project

    Exigent Technologies was initially hired by a law firm as a security consultant, before moving on to also take on IT managed services. Exigent Technologies takes care of hardware and software renewals, handles firewalls and antivirus tools, and manages desktop rollouts, even as it also vetted a document management system and implemented a remote access system. As a result, the client has been able to stay ahead of hackers and phishing scams seeking to grab the client's privileged information.

    “Their technicians have such a wide knowledge base and I’m amazed at how quickly they come up with solutions.” – IT Director, Law Firm

    Former clients
    Chiesa Shahinian & Giantomasi
    Bulbrite Industries
    roundCorner
    Heath Village
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place New York, NY
    4.9
    4.9
    6 Clutch reviews
  • 20

    Logismico

    Logismico is a web agency based in New York with more than two employees. Founded in 2010, they offer web development, custom software development, and product design services for clients in the fields of advertising, business services, and consumer products.

    Notable Project

    Logismico worked with a marketing agency to deliver mobile app dev services. The agency has clients that need mobile app solutions, and Logismico facilitates the apps’ development. The agency is happy with the results Logismico provides.

    “Perfect, our workflows were completely in sync.” - President, Marketing Agency

    Former clients
    TeamTracky
    Swimply
    Vanguard
    $ $ $ $ $
    equalizer $10,000+
    group2 - 9 Employees
    place Hicksville, NY
    4.9
    4.9
    4 Clutch reviews
  • 21

    JAFTON

    Jafton is a digital solutions provider founded in 2014 operated by a team of 5. Based in Union City, N.J., the company offers IT strategy consulting, custom software development, and web development services to small and midmarket businesses. They work with various languages, including Objective C, Swift, and SQL.

    Notable Project

    Jafton was hired by a trailer rental company to design their website. All features and functionalities in the site, including location-based searching, was built from scratch by Jafton. The site's functionality is active as expected.

    "The site isn't particularly complex, but they did an excellent job and were a good partner. Their CEO was very helpful, and he had suggestions for userbase growth, development, and other areas." - Founder, Trailer Rental Company

    Former clients
    Parkble
    Poutcase
    VaultCouture
    $ $ $ $ $
    equalizer $25,000+
    group10 - 49 Employees
    place New York, NY
    4.6
    4.6
    10 Clutch reviews
  • 22

    Varfaj Partners

    Varfaj Partners is a Reno, Nev.-based development company that specializes in web and mobile app development. Recently founded in 2017, Varfaj Partners has a small team of fewer than five employees. They solely work with small business clients and complement their development services with UX/UI design.

    Notable Project

    Varfaj Partners revamped and expanded a physical therapy practice's website. The physical therapy practice not only needed website updates but also wanted to change how the website was hosted and transfer its email services onto a new server. As a result of the partnership with Varfaj Partners, the practice's website is more manageable and user-friendly. 

    "I gave [Varfaj Partners] a project, and [they] took over. It took no effort on my part." – Owner, Physical Therapy Practice 

    Former clients
    Serious About Scissors
    Coyotes FC
    ERA Realty Central
    infophysiotherapy
    $ $ $ $ $
    equalizer $5,000+
    group2 - 9 Employees
    place New York, NY
    4.6
    4.6
    23 Clutch reviews
  • 23

    Appstronauts

    Appstronauts is a mobile app development company that was founded in 2015. They are headquartered in Warsaw, Poland with another location in Manchester, U.K. The company is made up of 11 employees and specializes in mobile app development, custom software development, and IT strategy consulting. Their client focus is small businesses, primarily in the business services, consumer products, and education industries.

    Notable Project

    Appstronauts partnered with an automotive company where they created a mobile app and a web app. The website they designed featured a more efficient way for the owner to conduct business online and reach more customers. The client appreciated how easy Appstronauts was to work with.

    "I was so excited for my product; whenever a certain feature was completed, they’d automatically upload it to a server, thus making it possible for me to test it." – Owner, Automotive Company 

    Former clients
    Beerd
    Smartfix30
    National Creativity Center Foundation
    OTIS Elevator Company
    $ $ $ $ $
    equalizer $10,000+
    group10 - 49 Employees
    place NY, NY
    5.0
    5.0
    15 Clutch reviews
  • 24

    Fusion Business Solutions Pvt Ltd

    Fusion Business Solutions Pvt Ltd is an outsourcing and offshoring company with over 300 employees founded in Udaipur, India. Founded in 2006, they work with mid-market and small businesses in the business services industry, among others, to provide non-voice BPO and back-office services. 

    Notable Project

    Together with an industrial chemical distributor, Fusion Business Solutions Pvt Ltd delivered an e-commerce website and is in the midst of a WordPress website development. The client is pleased by their attention to detail and responsiveness. 

    "They quickly respond to changes or any idea that we have that goes in a different direction. They meet deadlines. I’m never waiting on them to get something done." – Digital Marketing Specialist, Industrial Chemical Distributor

     

    $ $ $ $ $
    equalizer $1,000+
    group250 - 999 Employees
    place Kew Gardens, NY
    5.0
    5.0
    3 Clutch reviews
  • 25

    Brain Studioz

    Brain Studioz is a development agency based in New York. They have a team of around 5 employees and were founded in 2009. They provide web, custom software, and mobile app development services to primarily small businesses. 

    Notable Project

    Brain Studioz developed a website for a vacation rental management company. They added customized features for a booking engine. The final product is integral to the business successfully gathering leads and inquiries. 

    "Great design team and quick turn around on all projects." – CEO, Vacation Rental Management Company

    Former clients
    Kuero Hospitality
    Vilotel Luxury Villas
    BlueBox Packaging
    12 Design
    Andersons
    $ $ $ $ $
    equalizer $1,000+
    group10 - 49 Employees
    place New York, NY
    4.5
    4.5
    1 Clutch review
  • 26

    Addax LLC

    Addax LLC is an IT company in Union City, N.J. Founded in 2012, they have about 10 employees that serve small-business and midmarket clients in a variety of industries. Services include custom software development and CRM consulting.

    Notable Project

    Addax LLC handled SalesForce implementation services for a digital marketing agency. They worked on functionalities such as lead capture and internal notifications for support tickets. As a result, the client’s sales increased.

    “The team was on top of everything and Yaro PM'ed everything perfectly.” – CEO, Digital Marketing Agency

    $ $ $ $ $
    equalizer $1,000+
    group10 - 49 Employees
    place Union City, NJ
    5.0
    5.0
    2 Clutch reviews
Tell us about your project
NEED HELP SELECTING A COMPANY?

Based on your budget, timeline, and specifications we can help you build a shortlist of companies that perfectly matches your project needs. Schedule a free consultation with a Manifest Analyst.

TELL US ABOUT YOUR PROJECT