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Top Software Development Companies for c#

18 of 26 software development companies ranked on evidence in the Q4 2026 edition.

Between them, the 26 software development companies on this page cover web development (25), mobile app development (21), web design (21) and PHP (21). They also list work in United States of America, Poland, Slovakia and Czech Republic. 26 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

18 of 26 software development companies ranked on evidence held on 6 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

How this is ranked About this edition

All software development companies 18 ranked SMEs 17 ranked

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ActiveLogic Labs
Mobile App Development · Web Development · Web Design · Also in United States of America
Kansas City software development firm building web, mobile, AI and data systems with senior engineers based in the United States
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Why #1: Founded 2014 · Team of 30+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
IT Craft
Mobile App Development · Web Development · Web Design · Also in Germany
IT Craft is an outsourcing software developer that was established in 2001. It started with two people building and maintaining websites and now reports more than 330 specialists.
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Why #2: Founded 2001 · Team of 330+, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Ropardo - Software Engineering
Mobile App Development · Web Development · Web Design · Also in Romania
Ropardo - Software Engineering is a Romanian software company that has operated since 1994. It builds custom software for clients in other countries, using a nearshore model.
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Why #3: Founded 1994, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
INFOTECH, s.r.o.
Mobile App Development · Web Development · Web Design · Also in Slovakia
INFOTECH, s.r.o. is a Slovak software developer that writes bespoke systems for companies.
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Why #4: Founded 1999, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Artezio, LLC.
Mobile App Development · Web Development · iOS App · Also in United States of America
Custom software development company serving software vendors, start-ups and enterprises in finance, healthcare and retail
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Why #5: Founded 2000, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Right Information
Web Development · Web Design · E-Commerce Development · Also in Poland
Polish software house building custom applications and enterprise systems for industrial and technical sectors worldwide
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Why #6: Founded 2001, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
ArtSoft Consult
Mobile App Development · Web Development · Web Design · Also in Romania
Cluj-Napoca software outsourcing company developing custom applications in Java, .NET, C++ and PHP for international clients
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Why #7: Founded 2003, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Xplicity
Mobile App Development · Web Development · iOS App · Also in Lithuania
Xplicity is a software development company with Dutch and Lithuanian roots.
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Why #8: Founded 2004, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Finestmedia
Mobile App Development · Web Design · iOS App · Also in Poland
Finestmedia, now trading as FINEST, is an information technology company with more than 20 years in the sector.
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Why #9 (shared): In business 20+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
iQueSoft
Mobile App Development · Web Development · Web Design · Also in Nice
iQueSoft is now the practice of Valentin, an engineer who builds computer vision, machine learning and AI integration systems.
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Why #9 (shared): In business 20+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
StyleSoft
Mobile App Development · Web Development · Web Design · Also in Belarus
StyleSoft is a software company that has worked in the market since 2006.
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Why #9 (shared): Founded 2006, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
We Know IT
Web Development · Web Design · Software Development · Also in Sweden
We Know IT is a Swedish technology firm that works with growing companies. It has served clients since 2008, from start-ups and municipalities to listed businesses.
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Why #12: Founded 2008, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
ALTIMI
Mobile App Development · Web Development · Web Design · Also in Poland
ALTIMI is a software house with its base in Wrocław, Poland. It began as an IT outsourcing business and now describes itself as a technology acceleration partner.
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Why #13: In business 15+ years · Team of 200+, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Green Digit GmbH
Web Development · Web Design · Software Development · Also in Germany
Green Digit GmbH is an engineering company near Munich that develops technical software, above all for embedded systems. It has worked in this field for over fifteen years.
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Why #14 (shared): In business 15+ years, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
eProvement
Mobile App Development · ERP Software Development · Web Development · Also in Czech Republic
eProvement is a software company with offices in Czechia and Slovakia.
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Why #14 (shared): In business 15+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Euvic Services sp. Z o.o.
Mobile App Development · Web Development · Web Design · Also in Poland
Euvic Services sp. Z o.o. is a Polish software development company set up in 2014 and part of the wider Euvic group.
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Why #16 (shared): Founded 2014, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Susco Solutions
Mobile App Development · Web Development · iOS App · Also in United States of America
Susco Solutions is a business software company that says it has worked in the industry for more than 12 years.
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Why #16 (shared): In business 12+ years, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Primtek LLC.
Mobile App Development · Web Development · iOS App · Also in United States of America
Primtek LLC. is a custom software development company. It builds web and Windows applications with Microsoft tools, and replaces old desktop programs and spreadsheets with software…
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Why #18: In business 10+ years, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
3
3oSoft
Mobile App Development · Web Development · Web Design · Also in Slovakia
Our improvement lies in the passion to improve and innovate. Your improvement lies within us. 3oSoft is Software House with HQ in Bratislava, Slovakia.
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ACEQES, s.r.o.
Mobile App Development · Web Development · Web Design · Also in Slovakia
ACEQES, s.r.o. is a software development and consulting firm in Prešov, Slovakia.
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ARTIN
Mobile App Development · ERP Software Development · Web Development · Also in Czech Republic
ARTIN is a European technology company that develops software and AI-driven solutions end to end. It also provides integration, quality assurance, support and consulting.
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Cleo AG
ERP Software Development · Search Engine Optimization · Web Development · Also in Switzerland
CLEO AG is an IT company in Zurich that builds and extends large software systems.
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Directpl
Mobile App Development · Web Development · Web Design · Also in Mexico
Directpl is a software development firm headquartered in Warsaw, Poland, run by Direct Communication.
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Smart IT
Mobile App Development · Search Engine Optimization · Web Development · Also in United States of America
Smart IT is a custom software and web development company with headquarters in Minsk and San Francisco.
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Top Software Development Companies for c#

ActiveLogic Labs

IT Craft

Ropardo - Software Engineering

INFOTECH, s.r.o.

Artezio, LLC.

Right Information

ArtSoft Consult

Xplicity

Finestmedia

iQueSoft

StyleSoft

We Know IT

ALTIMI

Green Digit GmbH

eProvement

Euvic Services sp. Z o.o.

Susco Solutions

Primtek LLC.

3oSoft

ACEQES, s.r.o.

ARTIN

Cleo AG

Directpl

Smart IT

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