Obsolete applications, technology, and infrastructure can weigh down your overall business success. Luckily, legacy app modernization services can help you resolve all these issues and ensure your entire digital ecosystem is modern and meets user expectations.
By modernizing legacy applications, you can automate tasks, streamline business processes, and increase productivity, resulting in a better customer experience, increased customer loyalty, and boosted revenue. Modernized applications also enhance security and prevent cyberattacks.
To stay competitive and up-to-date, you need a reliable digital transformation partner by your side. In this article, you’ll discover the names of the top application modernization companies that can help you transition from legacy systems to cutting-edge applications. All these firms boast extensive expertise, years of experience, well-established work processes, and impressive portfolios.
Read on to find the best-fit partner for your business!
The Best Legacy Application Modernization Companies
TheoremOne is the best partner for the ultimate app modernization. The team advises clients on digital product strategy, engineering, and design to help them adopt the most effective software-creation methods.
They specialize in innovative services such as rescuing failing technology projects, revamping legacy systems, and accelerating business workflows with advanced technology and effective consulting practices. Their expert practitioners deliver sophisticated engineering and practical consulting, ensuring client success through human-centric solutions.
Focusing on outcomes, not just deliverables, TheoremOne’s client base and achievements speak louder than words. Disney, Google, 20th Century Fox, American Express—all these corporations have benefited from how this first-class application modernization agency rebuilt their outdated applications and improved the way their end clients see their software.
- Services and expertise: app modernization, custom software development, enterprise app integration, IT audit & consulting, web & mobile development, UI/UX design, software re-engineering, API integrations, end-to-end QA
- Tech stack: Java, .NET/C#, Node.JS, PHP, Python, JavaScript, ReactJS, Angular, etc.
- Location: Los Angeles, CA, USA
- Team size: 250+ experts
- Clients: Disney, Starbucks, Microsoft, AT&T, American Express, Google, 20th Century Fox, GitHub, and others
Founded in 1999, Software Mind has been delivering outstanding legacy app modernization services to clients worldwide for over 25 years. Having helped 250+ clients from more than 30 countries, the agency has implemented 1,000+ complex projects, enriching startups and enterprises with dedicated teams, outstaffing services, and end-to-end enterprise app modernization.
Software Mind helps businesses migrate from on-premises to the cloud, upgrade enterprise tools, and redesign architecture to ensure clients’ applications align with their goals. From analysis and design to implementation of new solutions, testing, and post-maintenance, Software Mind focuses on improving user experience across all your applications.
- Services and expertise: legacy app modernization, software development, cloud consulting, app development, UI/UX, and others
- Tech stack: C#, Java, PHP, .NET, etc.
- Location: Krakow, Poland
- Team size: 1,500+ experts
- Clients: Backbase, CoreLogic, Ecoact, CFC, Procountor, T-Mobile, Retail Insight, GemOne, Sporting Solutions, Virgin Mobile, and others
Another top mainframe modernization company is Blackthorn Vision. With 10+ years on the market and an average client engagement duration of 5+ years, the firm proves its commitment to long-term partnerships and client success.
Using extensive tech expertise and the latest technologies, Blackthorn Vision can transform outdated software systems to help clients maximize their business potential. From updating the system codebase, architecture, and components to tweaking the UI look and feel, their team defines the best-fit approach to refine your application.
Legacy software modernization services, web migration, cloud migration, software re-engineering, UX/UI redesign, software re-architecting, API integration, and IT consulting—they can cover every area of your digital infrastructure and deliver tangible results.
- Services and expertise: app modernization, web development, mobile development, cloud development, ML & AL, UX design, business analysis, QA
- Tech stack: Swift, Kotlin, .NET, C#, Node.js, React, JavaScript, etc.
- Location: Lviv, Ukraine
- Team size: 130+ experts
- Clients: Berkeley Lights, unTill, Scappman, BrightArch, and others
With 17 years of experience, 1,000+ unique projects in 40+ domains, and 1,600+ experts on board, Innowise breaks the charts and takes a deserved place on our list of the best application modernization companies. With a mission to help startups and mature corporations reimagine their IT infrastructure, Innowise offers software modernization services tailored to client’s unique needs, costs, and challenges.
Proficient in software re-engineering, legacy app modernization, software re-architecting, API integrations, app containerization, UI/UX modernization, end-to-end QA, and application modernization consulting, their team can help you reshape your IT infrastructure and achieve scalability, agility, and security of all your digital systems.
- Services and expertise: app modernization, custom software development, enterprise app integration, IT audit and consulting, web and mobile app development, UI/UX, 2D and 3D design, QA and software testing
- Tech stack: Java, .NET/C#, Node.JS, PHP, Python, Go, Ruby, Unity, Magento, Laravel, С++, JavaScript, ReactJS, Angular, Vue.js, TypeScript, Svelte, Swift, Kotlin, Flutter, React Native, Ionic, Xamarin, .NET MAUI, Objective-C
- Location: Warsaw, Poland
- Team size: 1,600+ experts
- Clients: BMW, Topcon, CoreLedger, Deloitte, Web3 Pro, Accenture, Definely
Taazaa stands out as a top application modernization agency thanks to its comprehensive approach to transforming legacy systems into agile, efficient, and scalable solutions. By leveraging cutting-edge technologies, Taazaa ensures that businesses remain competitive in a rapidly evolving digital landscape.
Working with startups and Fortune 500 companies, their team focuses on cloud migration, microservices architecture, and containerization, allowing them to customize modernization strategies to each client’s unique needs. By prioritizing seamless integration, Taazaa delivers legacy app modernization services to a wide range of industries, enhancing application performance and laying a solid foundation for future innovation.
- Services and expertise: app modernization, software development, web development, UX/UI design
- Tech stack: React, Angular, Vue.js, Node.js, Python, Java, .NET, etc.
- Location: Hudson, OH, USA
- Team size: 250+ experts
- Clients: Parker, Innago, Cleveland Clinic, Good Year, BrainingCamp, and others
Spiria excels in IT modernization services by transforming outdated systems into modern, efficient, and scalable software solutions tailored to current businesses’ needs.
They leverage advanced technologies, such as cloud computing and microservices, to enhance system performance and integration. Their app modernization approach includes everything from code refactoring to complete system overhauls, ensuring minimal disruption and maximum benefit.
With a customized strategy for each client, Spiria has served 600+ global customers and delivered over 2,000 projects. Throughout its 20 years of expertise, the agency has gained numerous awards, proving to be one of the best application modernization vendors in the world.
- Services and expertise: app modernization, UX/UI design, desktop development, web development, mobile development, software development
- Tech stack: Node.js, React, Python, etc.
- Location: Montreal, Canada
- Team size: 150+ experts
- Clients: Shutterstock, Bosch, Autodesk, AppDirect, and others
CSHARK is another top application modernization company famous for its exclusive expertise in revitalizing outdated systems to meet contemporary business needs. By employing the latest technologies, CSHARK ensures that legacy applications are transformed into efficient, scalable, and maintainable software solutions.
Their services cover everything from performance testing and market analysis to code refactoring, infrastructure modernization, and migration to the cloud to full-scale system migrations, all tailored to minimize disruption and maximize business value.
Founded in 2014, the company has established a global footprint in its 10 years of existence. Catering to clients in the US, Europe, and APAC, CSHARK combines deep technical knowledge with strategic insight to deliver innovative, future-proof solutions. This commitment to excellence and client success establishes CSHARK as a top-tier partner in the field of business application modernization.
- Services and expertise: app modernization, software development, application development, product design, QA & testing
- Tech stack: .NET, React, Azure, CSS, etc.
- Location: Wroclaw, Poland
- Team size: 250+ experts
- Clients: Fenergo, Kanri Soft, Nudge, The Unsigned Library, and others
With 20 years of experience and numerous recognitions and awards for its expertise and innovation, DevCom takes a significant spot on our list of the best application modernization companies.
Focusing on scalability and cost-efficiency, their team collaborates closely with clients on each stage of software modernization, from initial planning, infrastructure assessment, and strategy development to implementation and maintenance.
Whether it’s cloud migration, architecture update, or UX/UI redesign, DevCom guarantees seamless execution and support throughout and after software product modernization services. Covering various industries, the agency has rich industry-specific knowledge and expertise to adjust its approach to each project.
- Services and expertise: app modernization, custom software development, web development, desktop development, mobile development, IT support, testing & QA
- Tech stack: Java, .NET, PHP, Python, JavaScript, React, etc.
- Location: Lviv, Ukraine
- Team size: 50+ experts
- Clients: Siemens, Sharp, Entrust, Gogo, Exigen Insurance Solutions, and others
Based in Eastern Europe, Reenbit is a client-focused legacy modernization company that has proven to be a valuable partner for startups, medium-sized companies, and enterprises.
Starting with application modernization consulting to identify the best strategy for the collaboration, Reenbit offers legacy app migration to the cloud, application re-engineering, business application modernization and migration, application recording, containerization, mainframe modernization, and more.
Reenbit works closely with businesses to improve their system functionality, security, and performance. Whether you need to modernize one application or the entire digital ecosystem, this agency is your go-to partner.
- Services and expertise: app modernization, software development, web development, SaaS development, cloud consulting, cloud development, DevOps
- Tech stack: .NET, Azure, Angular, React, Node.js, etc.
- Location: Lviv, Ukraine
- Team size: 50+ experts
- Clients: CloudBooking, DataLoop, Norwegian Refugee Council, Trojan Safety, and others
Operating in the US and Latin America, EDSA helps clients transform their digital solutions with highly-performing technology. Offering an assessment of existing applications, implementation of new technologies, development of modernization strategies, and ongoing maintenance and support, their experts use the latest tools and techniques to optimize app performance and deliver better ROI.
Consulting, application assessment, cloud migration, microservices architecture, QA, and testing—this software modernization company can take on any project and deliver a customized strategy for improving your product and meeting your end customers’ needs.
- Services and expertise: app modernization, software development, cloud engineering, API integrations, RPA consulting, support & maintenance
- Tech stack: Python, .NET, Node.js, Java, React, Angular, Xamarin, etc.
- Location: Ciudad de México, Mexico
- Team size: 150+ experts
- Clients: Toyota, DHL, J. P. Morgan, BMW, Reebok, AXA, Coca-Cola, and others
Conclusion
Reduce costs, improve security, gain better data insights, increase scalability, and enhance functionality—all with the help of a leading legacy software modernization company. If you’re searching for an award winner with years of expertise and a solid portfolio, consider hiring the above mentioned vendors.
Select your best-fit partner and take the first step toward a future-proof application!
If you want to add your company to this list, contact us with your request by email or submit a form in the Top Choices section. After a thorough review, we’ll decide whether it’s a valuable addition.
