Top Application Modernization Companies And Services
Daria Pohrebniak
Content Writer - ReVerb
07.06.2024
This list compares top application modernization companies and services for businesses that need to update, migrate, or rebuild legacy applications.
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!
Application Modernization Companies At A Glance
Company
Location
Services
Team size
1. Impekable
San Francisco, CA, USA
app modernization, mobile app development, hybrid and cross-platform app development
At the top of our list is none other than Impekable, an award-winning app modernization company that partners with enterprises to transform their digital experiences. They combine Silicon Valley-quality UI/UX design with enterprise-grade software engineering, offering expertise across industries like banking, healthcare, retail, automotive, and more. Impekable has worked with leading clients such as Google, Nike, Samsung, Hewlett Packard Enterprise, Accenture, Adobe, Panasonic, and Aruba, providing end-to-end solutions.
Impekable aims to be a leader in product development by delivering exceptional ROI for clients. They focus on bridging technology, business, and customer needs to quickly deliver value. Through collaborative workshops, they identify high-impact areas for improvement and create powerful, future-ready upgrades to support long-term growth and success.
Specializing in effective and efficient modernization, Impekable helps companies tackle even the most complex legacy systems. Their agile approach ensures a swift transformation, often within months rather than years.
Services and expertise: app modernization, mobile app development, hybrid and cross-platform app development, web app development, product strategy and delivery, UX/UI design
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
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
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
The Software House (TSH) is a Poland-based team that helps companies modernize apps without freezing product work for months. Founded in 2012, they usually jump in when releases are slowing down, the architecture is creaking, or the codebase has become hard to change safely.
They like to start practical. A typical entry point is their Roadmap Sprint, where they map what is worth keeping, what should be rebuilt, and what can be improved step by step. From there it is hands-on work like refactoring, breaking monoliths into services, modernizing APIs, moving to the cloud, improving performance, tightening observability, and refreshing the frontend so changes ship steadily.
With a 200+ person team and 160+ clients served, TSH has plenty of experience modernizing real products under real deadlines. Their case studies include scaling StageClip during heavy growth, rebuilding parts of the XTRF platform, helping Ondat ship SaaS faster, and modernizing Snappit’s event ordering flow for a major bank.
Services and expertise: application modernization, legacy refactoring, platform re-architecting, microservices migration, cloud migration, performance optimization, observability strategy, modern frontend, product design, team augmentation
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.
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
Appinventiv is a global leader in mobile app development and legacy app modernization services, helping businesses fuel their digital future and gain competitive advantages. They’re not just building apps; they’re crafting custom AI, IoT, and robust enterprise-grade solutions that truly make a difference across a wide spectrum of industries.
With over 10 years of industry experience, the company has delivered more than 3,000 successful projects. This commitment has also earned them significant accolades, including the Tech Company of the Year 2023 (Times Business), Fastest Growing Technology Company 2023 and 2024 (Deloitte), and India’s Growth Champions in IT 2023 (Economic Times).
This company genuinely partners with organisations to bring those “next-generation” ideas to life, always with an eye on improving user engagement and streamlining how things work. Their powerhouse team helps businesses worldwide scale quickly and adapt, regardless of how rapidly the business environment changes.
What’s quite apparent is how Appinventiv manages to weave innovation directly into their seasoned industry practices, resulting in the development of custom platforms that consistently elevate your digital journey. Their whole approach revolves around the client, ensuring technology slots in seamlessly, which is key for staying competitive in today’s rapidly evolving market.
Service and Expertise: Mobile App Development, Enterprise Solutions, AI-Powered Applications, IoT Implementations, Cloud Services, Product Strategy & Delivery
Tech Stack: Deep expertise in AI, Machine Learning, React, Angular, Node.js, Flutter, Kotlin, Swift
Location: India, UK, USA, UAE, Australia, etc., serving a diverse international client base
Team Size: A dedicated force of 1600+ tech specialists
Clients: IKEA, KFC, KPMG, Adidas, Domino’s Edfundo, Ility, Soniphi, etc.
What Application Modernization Includes
Application modernization is the work of updating legacy software so it is easier to maintain, scale, secure, and integrate. Projects range from moving an existing application to the cloud with minimal changes to rebuilding it from the ground up on a modern architecture.
Assessment: auditing the current application, code quality, dependencies, infrastructure, and business value to decide what to keep, change, or retire.
Rehosting and replatforming: moving the application to cloud infrastructure, sometimes with small changes such as a managed database. Our list of cloud migration consulting companies covers this step in depth.
Refactoring and re-architecting: restructuring code, breaking monoliths into services or microservices, and replacing outdated frameworks.
Rebuilding or replacing: rewriting the application on a modern stack or moving to a commercial product when the old code cannot be saved.
Data migration, UI updates, and integration: moving data safely, refreshing the user experience, and connecting the application to modern APIs.
DevOps and ongoing support: setting up CI/CD, automated testing, and monitoring so the modernized system stays current. See our list of DevOps companies and services for specialists.
How To Choose An Application Modernization Company
Legacy stack experience: look for proven work with your current technologies, whether that is COBOL, .NET Framework, older Java, PHP, or desktop applications, as well as the target stack.
Assessment first: a strong partner will propose a discovery phase and a roadmap before committing to a full rebuild.
Incremental delivery: prefer approaches that modernize in phases and keep the business running, rather than a single risky cutover.
Data and security: ask how the team handles data migration, testing, rollback plans, and compliance during the transition.
Engagement model: modernization is usually priced as a fixed-scope project for assessment and a dedicated team or time-and-materials model for the build. If you need a broader outsourced team, compare these software development outsourcing companies.
Knowledge transfer: make sure your team will be able to run and extend the modernized application after the engagement ends.
Frequently Asked Questions
What is application modernization?
Application modernization is the process of updating legacy software to modern platforms, architectures, and practices. It can mean moving an application to the cloud, restructuring its code, replacing outdated frameworks, or rebuilding it entirely, with the goal of lowering maintenance costs and making it easier to scale and change.
What are the main approaches to legacy application modernization?
The common approaches are rehosting (lift and shift to new infrastructure), replatforming (small changes to use cloud services), refactoring (restructuring code without changing behavior), re-architecting (for example, moving to microservices), rebuilding from scratch, and replacing with an off-the-shelf product. Many projects combine several approaches across different parts of the system.
How long does an application modernization project take?
Timelines depend on the size of the application, the approach, and the amount of data involved. A simple rehost can take weeks, while re-architecting or rebuilding a large enterprise system usually runs for many months and is delivered in phases. An initial assessment is the best way to get a realistic estimate.
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.
