Top 100 Application Modernization Companies in the United States
The Best of December 2025Looking for a top legacy modernization service in the United States?
Application modernization companies can help create new business value from existing applications. Finding the right company to partner with, however, can be an overwhelming process.
To assist you in your search for a partner, we’ve compiled this list of the top application modernization services in United States. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best United States Enterprise Application Modernization Services
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31$10,000+10 - 49 employeesSt. Petersburg, FLHeadquartered in St. Petersburg, Florida, Cyfrania is a small website development firm. Established in 2022, the team provides web development, mobile app development, and enterprise app modernization.Read More
Clients
Plei, Inc MontiPlanet Kidiyo Luxury TherapistIndustries
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32$25,000+10 - 49 employeesTysons, VARead More
Fuselab Creative is a McLean, Virginia-based user experience company. The small team provides ux/ui design and was founded in 2017.
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33Undisclosed10 - 49 employeesMinneapolis, MNRead More
The Jed Mahonis Group is a mobile app development company from Minneapolis, Minn. Founded in 2012, it has about six employees that do mobile and web development, custom software, UI/UX design, and more for small businesses across a variety of industries.
Clients
Great ClipsIndustries
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34$100,000+50 - 249 employeesCarmel, INSEP, a custom software development firm, was founded in 1988. They are in Carmel, Indiana and have a midsize team. Their services include Custom Software Development, Artificial Intelligence, Web Development, Mobile App Development, and more.Read More
Clients
FORUM Credit UnionIndustries
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35$25,000+10 - 49 employeesDenver, CORead More
Tonic, a enterprise app modernization company, is headquartered in Denver, Colorado. The small agency was launched in 2015. Their services include enterprise app modernization, ux/ui design, web development, and mobile app development.
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36$25,000+10 - 49 employeesMinneapolis, MNRead More
Traust is an ERP consulting and SI company. The small Minneapolis, Minnesota-based firm was established in 2001. Their services include ERP consulting and SI, IT staff augmentation, custom software development, IT strategy consulting, and more.
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37$50,000+10 - 49 employeesSt. Louis, MORead More
Spry Digital is a small website development firm launched in 2010. Their team offers Web Development, Application Management & Support, UX/UI Design, Branding, and more. The agency is based in St. Louis, Missouri.
Clients
AlticeIndustries
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38$1,000+10 - 49 employeesCoral Gables, FLLocated in Coral Gables, Florida, Archie Labs is a software development company. The company specializes in Custom Software Development, Mobile App Development, Artificial Intelligence, Web Development, and more and is small.The company was established in 2024.Read More
Industries
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39$5,000+50 - 249 employeesFranklin Lakes, NJRead More
UX Team is a midsize UX design agency. The Franklin Lakes, New Jersey-based company was launched in 2014. Their services include UX/UI Design, Custom Software Development, Enterprise App Modernization, Web Design, and more.
Clients
Nestlé Morgan Stanley Fiserv GerberIndustries
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40$10,000+10 - 49 employeesAtlanta, GA7Factor Software is a custom software development firm launched in 2016. They are headquartered in Atlanta, Georgia and have a small team. The agency offers Custom Software Development, cloud consulting & SI, Web Development, Enterprise App Modernization, and more.Read More
Clients
Cox AutomotiveIndustries
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41$25,000+250 - 999 employeesChicago, ILRead More
Software development firm SPR was established in 1973. The midsize team specializes in custom software development, enterprise app modernization, cloud consulting & SI, ux/ui design, and more. The company is headquartered in Chicago, Illinois and Milwaukee, Wisconsin.
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42$50,000+50 - 249 employeesLakewood, COModernize is a midsize custom software development company. They provide Custom Software Development, Enterprise App Modernization, Mobile App Development, AI Consulting, and more and were launched in 2020.Read More
Industries
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43$10,000+10 - 49 employeesMinneapolis, MNCompoze Labs, a software development company, was established in 2015. The small Minneapolis, Minnesota-based team offers Custom Software Development, Artificial Intelligence, Mobile App Development, AI Consulting, and more.Read More
Clients
Swire Coca-ColaIndustries
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44Undisclosed10 - 49 employeesLeawood, KSActive Logic, a custom software development firm, is in Leawood, Kansas and Miami, Florida. The small agency was launched in 2014. Their services include Custom Software Development, Mobile App Development, IT staff augmentation, Web Development, and more.Read More
Clients
Ace HardwareIndustries
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45$5,000+2 - 9 employeesBirmingham, ALLunarLab is a small user experience agency established in 2021. Their services include UX/UI Design, Enterprise App Modernization, Digital Strategy, Web Design, and more. The agency is based in Birmingham, Alabama.Read More
Clients
Protective Life Croux Moxi AutoTecIndustries
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46Undisclosed10 - 49 employeesLancaster, PARead More
Seisan is a software development company. Founded in 1994, the team offers custom software development. Their small company is based in Lancaster, Pennsylvania.
Clients
Armstrong World Industries AHF Department of Homeland Security Maryland Office of the ComptrollerIndustries
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47$50,000+10 - 49 employeesColumbia, TNModernize Business Software | Pilot West Studios is a software development company. The small team is headquartered in Columbia, Tennessee. Their services include Custom Software Development, Enterprise App Modernization, Web Development, Mobile App Development, and more.Read More
Clients
Single Action Shooting SocietyIndustries
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48$5,000+50 - 249 employeesPasadena, CAEstablished in 1991, Art+Logic is a software development firm. The agency specializes in Custom Software Development, UX/UI Design, Web Development, Mobile App Development, and more and has a midsize team.Read More
Clients
Yamaha Kroger Trader Joes NASAIndustries
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49$25,000+10 - 49 employeesTroy, MIRead More
SharpQuest, Inc. Is a web development firm. Launched in 2009, the team offers Web Development, Mobile App Development, Enterprise App Modernization, cloud consulting & SI, and more. Their small company is Troy, Michigan-based.
Clients
Graham HealthcareIndustries
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50$75,000+10 - 49 employeesAustin, TXRead More
The Frontside is a software development company from Austin, Texas. It was founded in 2005, and its team of 11 provides web development, mobile development, and custom software development. The Frontside offers Ruby on Rails services.
Clients
ResideoIndustries
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51$25,000+50 - 249 employeesLos Angeles, CAUser experience design agency ISBX Corp was launched in 2009. They are located in Los Angeles, California and have a midsize team. ISBX Corp focuses on UX/UI Design, Custom Software Development, Web Development, Mobile App Development, and more.Read More
Clients
Science37 BrainCorp Red Bull - Multiple Projects Apple/BeatsIndustries
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52$10,000+10 - 49 employeesFarmington, MIRead More
Denovo Studios is a mobile app development firm based in Detroit, Mich. Founded in 2015, their team of 25 serves clients in the computer software sector. Services include web development and advertising.
Industries
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53$25,000+50 - 249 employeesIndianapolis, INRead More
DeveloperTown, founded in 2008, is a business software solutions developer based in Indianapolis, Ind. It employs about 70 team members. DeveloperTown specializes in enterprise app modernization, but also offers custom software and mobile app development. Many of its clients are enterprise businesses.
Clients
Republic AirwaysIndustries
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54$5,000+10 - 49 employeesHouston, TXEstablished in 2016, Tevpro is an IT strategy consulting company. The firm specializes in IT strategy consulting, Custom Software Development, Mobile App Development, Artificial Intelligence, and more and has a small team. The firm is in Houston, Texas.Read More
Clients
Lambda EnergyIndustries
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55$10,000+50 - 249 employeesLos Angeles, CARead More
DevTeam.Space is a development agency that was founded in 2015 and is based in Los Angeles. Their team of 8 specialize in web development and mobile app development for small businesses; these clients primarily reside in the advertising, business services, and consumer product industries.
Clients
AirbusIndustries
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56$25,000+50 - 249 employeesSeattle, WABlink UX is a midsize Digital Strategy company launched in 2000. Their team focuses on Digital Strategy, Product Design, Market Research, Enterprise App Modernization, and more. The agency is based in Seattle, Washington; Cambridge, Massachusetts; San Diego, California and San Francisco, California.Read More
Clients
AmazonIndustries
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57$50,000+10 - 49 employeesPortsmouth, NHRead More
Proximity Lab, an user experience company, was established in 2008. In Portsmouth, New Hampshire and San Francisco, California, their small team provides ux/ui design, product design, and enterprise app modernization.
Clients
AdobeIndustries
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58Undisclosed50 - 249 employeesAustin, TXRead More
Headspring is a full-service custom software engineering and consultancy headquartered in Austin, Texas. Founded in 2001, they design technology solutions to solve complex problems for partners across the country and have delivered over 800 projects. Headspring's services include custom software development, web development, mobile app development, cloud consulting, and enterprise app modernization.
Clients
eMoneyIndustries
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59$5,000+10 - 49 employeesNew York, NYRead More
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.
Clients
The New York Metropolitan Transportation CouncilIndustries
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60$50,000+50 - 249 employeesChicago, ILRead More
Grape Up is a tech consulting company based in Cracow, Poland with no more than 250 employees. Founded in 2006, they provide custom software development, cloud consulting, and IT staff augmentation services for enterprise-level and mid-market clients alike.
Clients
Porsche AGIndustries
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