As exciting new use cases for artificial intelligence emerge almost daily, the expectations placed on technology are rising faster than legacy systems can satisfy them. Many organizations that want to use AI in their workflows find that legacy applications pose an obstacle.
In response, the application modernization services market has grown substantially over the past few years. Application modernization companies provide engineering services to help democratize and standardize the data that AI systems and automations require to be effective. Experts at application modernization companies develop new solutions and upgrade existing applications to make high-quality data available for AI. These solutions also ensure a higher level of data maturity. Yet, finding and choosing a company to modernize technology is not easy. Our aim is to simplify the selection process by providing in-depth profiles of the top seven application modernization companies.
Application modernization companies like Intellias specialize in converting rigid, monolithic systems into adaptive, cloud-native environments. They offer application modernization solutions that support strategic business goals, such as real-time data access, continuous delivery of high-quality data, and predictive analytics. Whether they support financial institutions in handling complex databases or logistics platforms in managing live operations, legacy systems can’t compete with modern solutions. By partnering with a top-rated application modernization company, organizations can reduce technical debt while preparing for AI, data analytics, and serverless infrastructures.
The best application modernization vendors offer more than a lift-and-shift method for moving to the cloud. They perform deep refactoring and establish containerization strategies designed to scale across AWS, Azure, or hybrid deployments. These firms also integrate mobile application support, design services, and cloud-native architectures customized to work with modern enterprise workflows.
Whether replatforming legacy software, evaluating cloud readiness, or analyzing the capabilities of your day, choosing the right partner is important. This guide highlights top application modernization companies with proven experience providing application modernization services that align with real-world business goals. These firms also help future-proof modern solutions.
Benefits of legacy app modernization services
System modernization affects the entire organization. Companies can expect to see these benefits from selecting a top legacy application modernization company:
- Increased efficiency: Cleaner source code and automated processes reduce complexity and cut down on manual work.
- Improved scalability: Modern cloud architectures are flexible and can be expanded as companies grow.
- Reduced maintenance costs: Application modernization services lower the total cost of ownership (TCO) by moving to managed cloud services that result in fewer overall repair costs.
- Enhanced security and compliance: Governance becomes easier and more effective with granular control of resources, which also helps demonstrate compliance with various laws and regulations like the Health Insurance Portability and Accountability Act (HIPAA) and the General Data Protection Regulation (GDPR).
- Faster time to market: Containerization and DevOps practices support quicker release cycles and speed up delivery.
- AI and analytics readiness: Modernization lays the groundwork for data-driven analytics and AI.
- Business continuity: Cloud platforms improve fault recovery and provide the infrastructure for zero-downtime updates that keep services operational.
The market for application modernization services
Application modernization is the process of updating or replacing legacy systems to align with current business trends and needs. It could include converting outdated systems to cloud deployments, rehosting applications for improved performance, refactoring for modularity and maintainability, or replacing entire platforms with modern architectures. The top application modernization companies create custom systems that meet individual needs. These leading organizations integrate application modernization solutions with business logic that helps lay the groundwork for future AI development.
Market direction
The application modernization services market continues to grow as more companies prioritize digital transformation. They are moving away from monolithic, mainframe systems to modular, scalable platforms that support AI, data analytics, and real-time automation. Most companies transition to AWS, Azure, or Google Cloud as part of their digital journey. Many firms are also embracing cloud DevOps, serverless functions, microservices, and APIs as default architectural choices. Mainframe modernization has become central for product innovation and competitive differentiation.
Meanwhile, the rise of data-centric strategies has accelerated demand for legacy application modernization services to democratize both structured and unstructured data. Platform modernization often leads to other data-driven projects, such as automating manual processes or establishing predictive systems.
Market analysis
Legacy systems still consume a disproportionate share of IT budgets. Ongoing costs for legacy software — such as database licensing, software licensing, security patches, and hardware overhead — are barriers to both agility and innovation. Software modernization companies phase out legacy apps that cause these bottlenecks.
Nevertheless, organizations are becoming more cautious about choosing application modernization vendors. Companies seek established software developers who demonstrate a history of engineering expertise. Experience in a specific industry, geographic region, or type of technology can be a differentiator in a crowded field of providers.
Market segmentation
The application modernization market can be segmented by service type, technology approach, vertical, and company size. Services range from complete replatforming to migrating code to the cloud. Technology strategies depend on whether companies pursue hybrid cloud adoption, full cloud architecture, serverless modernization, or greenfield development. Verticals like banking, insurance, manufacturing, and government each bring specific requirements that shape vendor strategies.
Small and midsize companies often work with regional application modernization vendors or platform-specific specialists, while large companies typically engage software development firms for broader transformation.
Vendor landscape
Application modernization firms range from large global consultancies to small, focused engineering agencies. Companies at the top distinguish themselves by offering a combination of targeted solutions and deep technical expertise. Some specialize in modernizing legacy applications, while others offer comprehensive enterprise solutions including mobile application upgrades, database management, and cloud-native development.
The right agency should understand both the technical depth and operational reality of your modernization project.
Top 7 legacy application modernization service providers
1. Intellias
Intellias is a global software engineering and digital consulting company founded in 2002. As a top-rated legacy software modernization company, Intellias has over 3,000 experts in 17 offices and delivery centers across Europe, Asia, and the Americas. Intellias clients specialize in mobility, financial services, telecom and media, retail, healthcare, travel and hospitality, and high-tech. The company combines modern technologies with engineering craftsmanship and industry expertise to develop custom solutions that fit clients’ needs. The culture at Intellias emphasizes partnership, teamwork, empathy, a growth mindset, a focus on value, and diversity. Intellias has been recognized by Forbes, EY, Gartner, IAOP, and Frost & Sullivan as both an industry leader and an outstanding employer.
Intellias company snapshot
| Unique selling points |
|
|---|---|
| Other services offered | Application development, legacy platform modernization (e.g., IBM i, IBM z), cloud migration, DevOps enablement, data and analytics, AI/ML, cybersecurity, experience design, digital consulting, managed support |
| Clutch rating | 4.9/5.0 |
| Founded | 2002 |
| Global presence | USA, Ukraine, Poland, Portugal, Croatia, Bulgaria, Colombia, India, and Germany |
| Core technologies | Cloud platforms, microservices, DevOps pipelines, AI/ML technologies, proprietary modernization frameworks |
2. Radixweb
Founded in 2000, Radixweb is a global software engineering company with headquarters in Ahmedabad, India, and offices in the US, Canada, Australia, and Morocco. With a team of over 650 experts, Radixweb has delivered more than 4,200 projects to clients in over 25 countries. In addition to legacy application modernization, they focus on product engineering, custom software development, AI/ML, cloud and DevOps, SaaS, data analytics, and enterprise applications. Radixweb takes a UX-first, customer-aligned approach to development, backed by in-house frameworks and agile delivery models.
Radixweb company snapshot
| Unique selling points |
|
|---|---|
| Other services offered | Custom software development, product engineering, AI/ML solutions, enterprise app development, cloud enablement, DevOps integration |
| Clutch rating | 4.9/5.0 |
| Founded | 2000 |
| Global presence | USA, India |
| Core technologies | Microservices, cloud technologies, DevOps pipelines, UI/UX frameworks, custom in-house tools, automation frameworks |
3. Imaginary Cloud
Imaginary Cloud was founded in 2010 and is based in Coimbra, Portugal, with offices in Lisbon, London, and the US. They’ve delivered over 300 projects in more than 20 industries and have an NPS score of 78. Imaginary Cloud focuses on seamless digital acceleration by offering end-to-end services in product ideation, software and web development, mobile apps, AI/ML, UI/UX design, and quality assurance.
Imaginary Cloud company snapshot
| Unique selling points |
|
|---|---|
| Other services offered | Web and mobile product development, UI/UX audits, staff augmentation, AI/ML service, QA |
| Clutch rating | 5.0/5.0 |
| Founded | 2010 |
| Global presence | Portugal, UK, and USA |
| Core technologies | React, React Native, Angular, Vue.js, Node.js, Ruby on Rails, Python/Django, AWS, Docker, Webflow |
4. Devox Software
Devox Software is an American software development company that helps businesses build new products using modern technology. Founded in 2018, the company delivers services with consistently high satisfaction ratings, including a 92% NPS, 95% customer approval, and a 5-star rating on Clutch. Devox prioritizes measurable ROI backed by technical excellence and scalable architecture.
Devox Software company snapshot
| Unique selling points |
|
|---|---|
| Other services offered | Full-cycle software development, CTO-as-a-service, QA and test automation, software refactoring, legacy rationalization, DevOps consulting |
| Clutch rating | 5.0/5.0 |
| Founded | 2018 |
| Global presence | North America, Ukraine, Poland |
| Core technologies | .NET Core, ASP.NET, Angular, Vue.js, React, MS SQL; Docker, Kubernetes, Terraform, Pulumi, Azure, AWS, GCP, AI/ML technologies |
5. Euvic, Inc.
Euvic is a global IT services company founded in 2005. Their core delivery hub is in Poland, and they have offices across Europe, the US, and the Middle East. With over 5,000 engineers and nearly two decades of experience, Euvic specializes in software development, web and mobile apps, process automation, AI and computer vision, cloud services, IT infrastructure, and digital transformation. The company operates under a people-first philosophy called “The Good People,” which emphasizes long-term collaboration, transparency, and shared values. Euvic’s Smart Delivery Model provides nearshoring opportunities to clients in the manufacturing, finance, healthcare, logistics, and retail industries.
Euvic company snapshot
| Attribute | Details |
|---|---|
| Unique selling points |
|
| Other services offered | Software development, web and mobile apps, process automation, AI and computer vision, cloud services, IT infrastructure, digital transformation |
| Clutch rating | 4.8/5.0 |
| Founded | 2005 |
| Global presence | Poland, USA, UK, Sweden, Germany, Finland, Switzerland, Austria, and the Middle East |
6. Innowise
Innowise is a global full-cycle software development company with a 93% repeat client rate. Founded in 2007 in Warsaw, Poland, it has grown to over 2,500 engineers with offices in Europe, North America, and the Middle East. The company has completed over 1,300 projects using technologies such as AI/ML, big data, blockchain, cloud development, AR/VR, and IoT. Industries that Innowise serves include FinTech, MedTech, logistics, eCommerce, education, and manufacturing. Innowise’s VOKA.IO product supports 3D medical visualization for doctors and researchers.
Innowise company snapshot
| Unique selling points |
|
|---|---|
| Other services offered | Custom software development, staff augmentation, UI/UX design, DevOps, data analytics, AI/ML, business automation, cloud migration, legacy system upgrades |
| Clutch rating | 4.8/5.0 |
| Founded | 2007 |
| Global presence | Poland, UK, Italy, France, Sweden, Norway, Lithuania, Germany, Switzerland, Georgia, Uzbekistan, and UAE. |
7. ModLogix
ModLogix is a legacy software modernization company founded in 2014 in New York City. The company specializes in transforming outdated enterprise applications into scalable, cloud-ready platforms. ModLogix guides clients through modernization using cloud migration, refactoring, and updated frameworks such as ASP.NET Core and Angular. Their projects are supported by Scrum, Kanban, and other agile delivery models. ModLogix serves clients in the healthcare, finance, logistics, education, and nonprofit sectors.
ModLogix company snapshot
| Unique selling points |
|
|---|---|
| Other services offered | Cloud migration, architecture refactoring, enterprise app modernization, legacy framework upgrades |
| Clutch rating | 4.9/5.0 |
| Founded | 2014 |
| Global presence | USA |
Criteria for selecting a partner
Your choice of application modernization company can determine whether your efforts deliver long-term value or compound existing problems. With many application modernization vendors offering overlapping services, enterprises must evaluate their worth based on tangible criteria that demonstrate a vendor’s capability to meet business needs.
- Domain expertise and proven experience: The best application modernization companies have delivered complex, enterprise-grade solutions in real-world environments. Look for legacy application modernization firms with documented case studies, especially in your domain.
- Technical capabilities and certifications: From cloud platforms like AWS and Azure to CI/CD, containerization, and mainframe modernization, partners should offer depth of knowledge about relevant solutions. Seek vendors who invest in DevOps maturity and cloud-native development.
- Security and compliance standards: Legacy app modernization services often involve sensitive business logic and customer data. Look for vendors who have ISO certifications, comply with SOC 2, and implement security protocols throughout development.
- Architecture-first mindset: A quality software modernization company should propose a clear, modular architecture that aligns with your platform goals. Avoid providers who suggest one-size-fits-all solutions or skip system audits.
- Flexibility and collaboration: Your modernization partner should work as an extension of your team. They should have flexible co-development options and the ability to adjust timelines and resources as priorities shift.
- Cultural and organizational fit: Long-term modernization programs require sustained alignment. Select a partner that shares your values.
- Client testimonials and references: Finally, ask to evaluate client feedback. Top-rated application modernization companies maintain ongoing relationships with clients and can provide references, performance metrics, and examples of real impact.
A strong modernization partner will guide your company through system updates and act as a strategic advisor. This becomes even more important as businesses increasingly invest in data platforms, serverless computing, and intelligent automation.
Choosing among legacy software modernization services
The success of a modernization project depends on how well you work with your partner. Application modernization companies vary in their approach, but most follow a similar process designed to reduce risk and ensure that engineering recommendations align with business needs.
Start by clarifying the drivers behind modernization. Are you seeking lower operational costs, improved scalability, integration of AI and data platforms into your existing systems, or something else? Evaluate your current level of technical debt as well as your legacy app dependencies. Learn your platform limitations to establish baseline requirements for the modernization project.
Once you have determined which companies meet your high-level expectations, initiate a discovery session with each company that specializes in upgrading legacy systems. During the discovery session, discuss your business culture (and the vendor’s) to ensure a good cultural fit. Ask about relevant experience and the vendor’s ability to support your chosen technologies — such as React instead of Angular for the system UI or shifting from an on-premises server to serverless platforms.
You should then ask selected vendors to prepare detailed proposals. Top application modernization vendors will deliver technical recommendations along with migration timelines, resource models, and various evaluations to determine readiness for advanced technologies, such as cloud deployment or AI. Many companies then enter a pilot phase. The length of this phase and the activities it involves depend on many factors, including the vendor’s specialties and your most pressing needs. A pilot helps to validate application modernization services for critical systems before committing to full deployment.
After selecting a vendor, you’ll need to finalize contracts and begin the legacy app modernization project in phases. The best application modernization companies maintain close communication with their clients. Many, like Intellias, embed their engineers within the client’s company throughout the system modernization project and stick around for system maintenance and further development even after the modern system has been installed. Finally, the application modernization company should agree on KPIs to measure project success.
The most effective projects are those built with shared ownership of business outcomes. By aligning early on goals, technologies, and success metrics, organizations ensure a smoother transition from legacy systems to scalable, intelligent platforms.
Working with a digital transformation company
Modernizing legacy systems is often the first step in any digital transformation effort. Top legacy application modernization companies create the technical foundation needed to support long-term innovation and adapt to continuous change. Without scalable platforms and cloud-native infrastructure, organizations would struggle to employ modern technologies such as AI, real-time data analytics, and automation.
Top application modernization companies help organizations unlock these capabilities by re-architecting legacy software and integrating modern development practices. The result is an ecosystem that supports rapid product delivery using data-driven decisions. As businesses continue to evolve in complexity, modular architectures and platform-first thinking enable flexibility to experiment with new solutions and adapt to changes without reengineering core infrastructure.
Legacy application modernization services also integrate with modern technologies, such as mobile applications and hybrid environments, to expand capabilities. They make it easier to activate data pipelines, support AI models, and connect backend processes with user-facing platforms. Organizations that modernize effectively can transition from slow, reactive operations to proactive, intelligence-driven models with significantly shorter feedback loops.
Whether supporting cloud adoption, enabling serverless development, or reducing dependency on outdated mainframes, application modernization solutions are central to becoming a truly digital business.
Final thoughts on application modernization vendors
Legacy systems might support your business today, but that doesn’t mean they will carry your business into tomorrow. The question is not if you will need application modernization services but rather when you will need them and who can provide them. The right application modernization vendor will position your company to accelerate into the future with the help of new technologies. They will replace legacy systems and reduce system complexity throughout the business.
In this post, we have listed only a few of the top application modernization companies. Each company offering application modernization services has a unique blend of engineering expertise, delivery capabilities, and platform knowledge to help you choose the right modernization path. As you evaluate providers, prioritize those who can align modernization with your broader goals around cloud computing, AI, and product innovation.
A trusted partner like Intellias will guide your digital transformation, modernize your applications, and lead you into the future. Contact one of our application modernization specialists to get started.
