Top 100 Application Modernization Companies in the United States
The Best of August 2026Looking 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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61$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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62$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.
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Republic AirwaysIndustries
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63$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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64$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.
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AirbusIndustries
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65$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.
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AdobeIndustries
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66Undisclosed50 - 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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67$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.
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The New York Metropolitan Transportation CouncilIndustries
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68$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.
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Porsche AGIndustries
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69Undisclosed50 - 249 employeesPeabody, MAGraVoc, a web design company, is located in Peabody, Massachusetts. The midsize team provides Web Design, Video Production, IT strategy consulting, CRM consulting and SI, and more. The company was founded in 1994.Read More
Clients
MAGNA-TILES® Coravin Massachusetts Institute of Technology E3 Ranch FoundationIndustries
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70Undisclosed50 - 249 employeesNorfolk, VARead More
Martian Craft is a user experience design company established in 2010. The company provides ux/ui design, cloud consulting & SI, custom software development, web development, and more and has a midsize team.
Clients
AppleIndustries
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71$10,000+50 - 249 employeesChicago, ILRead More
Alligatortek is a software company headquartered in Chicago with an office in Oakbrook Terrace, Ill. Since 1993, their team of 59 has lent its services in custom software development, mobile app development, and cloud consulting & SI. They specialize in Azure, and have experience in working with frameworks such as .NET, AngularJS, and React Native.
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Feeding America -
72$250,000+50 - 249 employeesHouston, TXRead More
ChaiOne is a mobile app development studio that was founded in 2008. ChaiOne has a team of about 50 spread between its Houston and Austin, Texas locations. ChaiOne does app development, UI/UX design, enterprise app modernization, digital strategy, and internet of things solutions. They serve large enterprise clients, particularly in the energy sector.
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ExxonMobilIndustries
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73$10,000+1,000 - 9,999 employeesPrinceton, NJCygnet.One is an Application Testing company. They are located in Princeton, New Jersey; Ahmedabad, India; Dubai, United Arab Emirates and Cape Town, South Africa and have a large team. Their services include Application Testing, cloud consulting & SI, BI & big data consulting & SI, IT staff augmentation, and more.Read More
Clients
B-Cam LtdIndustries
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74$5,000+10 - 49 employeesSan Francisco, CARead More
Launched in 2020, Apex Lab is a software development company. Their small team is based in Tallinn, Estonia and San Francisco, California. Their team offers custom software development, mobile app development, web development, and enterprise app modernization.
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75$25,000+10 - 49 employeesAtlanta, GARead More
BlueFletch is a mobile development agency based in Atlanta founded in 2008. Their team of 38 experts specializes in mobile app development, custom software development, and enterprise app modernization for midmarket and large firms. They have experience working in the industries of retail, transportation, and consumer products & services, among others.
Clients
The Home DepotIndustries
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76$1,000+50 - 249 employeesSeattle, WANTSprint LLC is a custom software development company. Their midsize team is headquartered in Seattle, Washington. Their services include Custom Software Development, Artificial Intelligence, IT staff augmentation, Enterprise App Modernization, and more. The firm was established in 2016.Read More
Clients
OBHOA Rental Kobargo Growing Brilliant PressyIndustries
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77$25,000+50 - 249 employeesWestport, CTLaunched in 2010, Quartus Technology, Inc. Is a mobile app development company. Their midsize team is based in Westport, Connecticut. Their team offers Mobile App Development, UX/UI Design, Custom Software Development, Web Development, and more.Read More
Clients
Beaver Creek Dasher Lawless SwingU The Establishment 1898Industries
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78$25,000+10 - 49 employeesSpring, TXRead More
Software development firm Espresso Moon was established in 2004. Their small team is in Houston, Texas. Their services include custom software development, mobile app development, web design, and IT managed services.
Clients
Nucor Steel Tesla Solvay MacomIndustries
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79$25,000+10 - 49 employeesNew York, NYRead More
Def Method is a software development company based in New York City. Founded in 2014, the team of 21 specializes in custom software development, web development, IT staff augmentation, AI, and more. They work primarily with large and mid-sized businesses, focusing on financial services, real estate, and IT.
Clients
Walmart -
80$50,000+50 - 249 employeesPortland, ORAltSource Software, a software development firm, is headquartered in Portland, Oregon and Lake Oswego, Oregon. The midsize team offers Custom Software Development, Digital Strategy, Web Development, Mobile App Development, and more. The firm was founded in 2004.Read More
Clients
OHSUIndustries
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81$5,000+10 - 49 employeesPlymouth, MNRead More
Cirrius Solutions is a global technology Salesforce.com service company that has successfully completed over 250 successful Salesforce implementations. Specific areas of expertise include CRM consulting and SI, custom software development, enterprise app modernization, and IT strategy consulting. The team of 2-10 specialists provides marketing and sales automation, customer service, and social CRM solutions. Since its 2009 foundation, Cirrius Solutions has served clients local to its Minneapolis headquarters and internationally.
Clients
Thomson ReutersIndustries
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82$50,000+1,000 - 9,999 employeesHouston, TXCelebal Technologies Americas Inc is an Enterprise App Modernization company. Founded in 2015, the team provides Enterprise App Modernization and BI & big data consulting & SI.Read More
Clients
TE ConnectivityIndustries
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83$50,000+10 - 49 employeesNew York, NYRead More
Located in New York City, Lightmatter is an agency offering web and mobile app development, design, and other digital services. Their team of under 50 employees serves mostly enterprise businesses in industries like financial services, gaming, and healthcare. They were founded in 2013.
Clients
NYU LangoneIndustries
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84$100,000+50 - 249 employeesLehi, UTRead More
Global software development company SolutionStream is headquartered in Lehi, UT with additional offices in Salt Lake City, UT and Scottsdale, AZ. SolutionStream mostly serves mid-market and enterprise clients in the education, financial services, and information technology industries. The team of about 100 employees provides custom software and mobile app development and UX/UI design.
Clients
DomoIndustries
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85$50,000+10 - 49 employeesIrvine, CARead More
Company A is a custom application development company based in Irvine, Calif., with offices in Plano, Texas, and Novi Sad, Serbia. The company, founded in 2015, has a team of more than ten that provides cloud consulting & SI, custom software development, web development, mobile app development, and enterprise app modernization services. Company A serves small and larger-sized companies in various industries, including IT, financial services, and health care & medical.
Industries
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86$10,000+50 - 249 employeesCoral Springs, FLRead More
2am.tech, a software development firm, was launched in 2013. The midsize team focuses on custom software development, web development, mobile app development, e-commerce development, and more. The firm is based in Miami Gardens, Florida.
Industries
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87$50,000+10 - 49 employeesOrlando, FLRead More
This Orlando, Fla. app development agency was founded in 2008. Echo Interaction Group has about 10 team members who specialize in various technological practices such as enterprise app modernization, wearables development, hardware integration, marketing, and UX/UI design.
Clients
VOXX International -
88$10,000+10 - 49 employeesHouston, TXRead More
Optimum is a digital marketing firm based in Houston. Since 2014, the small team of 3+ has specialized in web development, IT consulting, e-commerce development, email marketing, and mobile app development.
Clients
TrumpFIndustries
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89Undisclosed2 - 9 employeesSeattle, WARead More
Freelock LLC is a Seattle-based internet and web design firm that was founded in 2002. Freelock LLC's team of 5 employees works mainly with small- and mid-market sized clients but has experience working with large corporations as well. The firm specializes in web and UI/UX design along with e-commerce development.
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90$10,000+10 - 49 employeesHouston, TXRead More
Epicenter Consulting is a web and mobile development company based in New York, with an additional location in Houston. Founded in 2008, this company has 15 employees. Services provided by Epicenter Consulting include custom software development, enterprise app modernization, and UI/UX design for businesses of all sizes.
Clients
Qualified HardwareIndustries
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