Top 100 C# Developers

Founded in 2000, AgileEngine is a software development firm based in McLean, Va with offices in Kiev, Washington, DC, and Beunos Aires. They have more than 200 employees and offer custom software development, app development, and UX/UI design for midmarket clients. 

Pell Software is a custom business software developer based out of Denver. Founded in 2019 and with about 5 team members, they focus on custom software development and website development mainly for small businesses in manufacturing, e-commerce, automotive, and financial industries. 

Facile Technolab is a software development company founded in 2016. They are headquartered in Ahmedabad, India and have a midsize team. Their services include Custom Software Development, Web Development, Enterprise App Modernization, and IT staff augmentation.

Altkom Software & Consulting, founded in 1998, is a software development company headquartered in Warsaw, Poland, with an additional office in Krakow, Poland. They specialize in custom software development, web development, and application management & support. The company has 130+ employees who work with enterprise, mid-market, and small businesses. The businesses they serve are mostly in the financial services industry. 
 

Iversoft is a full stack digital agency. They were founded in 2009, are based in Ottawa, Canada, and have a staff of 26 employees. They specialize in custom software development, digital strategy, and mobile app development for small business and midmarket clients in the entertainment, non-profit, and gaming industries. 

StoryMode is a game development studio in Minsk, Belarus. Founded in 2018, they have about 15 employees that serve mostly small-business clients in the gaming industry. Services include custom software, mobile app, and AR/VR development.

Founded in 2004, Computer Conquest is an IT managed services company. The company offers IT managed services, cloud consulting & SI, custom software development, IT strategy consulting, and more and has a small team. The company is in Cirencester, United Kingdom.

KSB Technologies is a custom software development company. The small WOLVERHAMPTON, United Kingdom-based team focuses on custom software development, web development, IT strategy consulting, cloud consulting & SI, and more. The agency was founded in 2021.

Located in Winnersh, England, Transparity is a business intelligence company. Founded in 2015, the midsize team specializes in BI & big data consulting & SI, cloud consulting & SI, IT managed services, and Custom Software Development.

Software development company UplineSoft was founded in 2020. Their midsize team is headquartered in Charlotte, North Carolina and Monroe, North Carolina and specializes in Custom Software Development, IT staff augmentation, Artificial Intelligence, and Low/No Code Development.

Yalantis is a custom software development firm located in Warszawa, Poland; L'viv, Ukraine; Larnaca, Cyprus and Dnipro, Ukraine. The firm focuses on Custom Software Development, BI & big data consulting & SI, IoT development, and Artificial Intelligence and has a midsize team.The firm was launched in 2008.

Founded in 1998, REEA Global is a midsize software development firm. Their team specializes in custom software development, ux/ui design, web development, mobile app development, and more. The agency is located in Baltimore, Maryland.

Custom software development company Rubius was founded in 2005. The company offers custom software development, web development, mobile app development, AR/VR development, and more and has a midsize team.

BGO Software is a Bulgarian software design company that has offices in Sofia, Plovdiv, and London, U.K. Established in 2008, the company employs a team of 73 who specialize in software and mobile app development. 

Located in Oslo, Norway and Colombo, Sri Lanka, 99x is a midsize software development firm. Launched in 2004, the team provides custom software development, mobile app development, application testing, enterprise app modernization, and more.

Tacta is a software development firm. Founded in 2007, the team offers custom software development and web development. Their midsize company is Bruxelles, Belgium-based.

Flatworld Solutions is an outsourcing company headquartered in Princeton, N.J. Founded in 2006, they have a team of over 750 employees. The firm's international offices are based across India, the U.K, and the Philippines and has experience in nonvoice/ back office, transcription, and call center services. Their Clients mostly work in manufacturing, education, and healthcare industries. 

Pentalog is a large Brașov, Romania-based custom software development company. Established in 1993, the team offers custom software development, IT staff augmentation, e-commerce development, and web development.

Launched in 2018, Reenbit is a software development company. They are based in L'viv, Ukraine and have a small team. Their services include custom software development, cloud consulting & SI, web development, enterprise app modernization, and more.

Synetec is a software development consultancy headquartered in London. They were established in 2009, and have 26 employees. Synetec's range of services includes cloud, CRM, and business intelligence consulting, software integration, web development, custom software development, and more.

DB1 Global Software is a software development company headquartered in Maringa, Brazil and founded in 2000. They have a team of 500 who provide custom software development, UX/UI design, mobile and web development services to mid market clients. They primarily work with clients in the BFSI, tech, and utilities industries.

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.

Ceiba Software is a software and app development firm based in Medellin, Colombia, with a secondary location in Bogota, Colombia. Founded in 2006, this company has more than 400 employees. Services offered by Ceiba Software include custom software development, mobile app development, and IT staff augmentation for businesses of all sizes.

Founded in 2002, Warp Development is a well-established and seasoned software development consultancy with a dedicated senior-centred team of over 100 experienced professionals. Over the last two decades, Warp Development has become a prominent player in custom software development and digital commerce, with offices in Pretoria and Somerset West. We offer custom software development, app development, enterprise e-commerce and CMS solutions, and UX/UI design services. We have immense experience working with various industries, technologies, and platforms and continue to build upon our values of trust, transparency, excellence, communication, and innovation. Our primary focus is developing bespoke software and offering solutions that do not follow a one-size-fits-all approach.

Located in Brisbane, Australia, WorkingMouse is a software development agency that was founded in 2014. The agency and their team of 35 specialize in custom software and mobile app development. 

Lightpoint Global is a development company with 41 employees that is based in Minsk, Belarus. Since being founded in 2011, they have focused on web development, big data consulting, and cloud consulting. They work with both small and mid market businesses in mainly media, education, and financial services. 

Influential Software is a software development company. The midsize team is based in London, England; Maidstone, England and Glasgow, Scotland. Their services include Custom Software Development, Web Development, BI & big data consulting & SI, IT managed services, and more.

Newwave Solutions is a software development firm. Launched in 2011, the team provides Custom Software Development, Mobile App Development, Blockchain, Web Design, and more. Their midsize agency is Hanoi, Vietnam-based.

Based in hanoi, Vietnam, Politetech is a website development firm. The company provides web development, mobile app development, custom software development, AR/VR development, and more and is midsize.The company was established in 2010.

Leobit is a web and mobile application development company based in Lviv, Ukraine.  Founded in 2014, their team of 114 specializes in IT staff augmentation beyond their development capabilities. They work with mid market and enterprise companies in the information technology, hospitality, health care, and e-commerce industries.