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Last Published:
28 October 2026
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Keeping up with the fast pace of technology is tough, especially when your business relies on outdated systems. That’s where application modernisation comes in. Think of it as transforming old software into modern, scalable solutions that help you work smarter, not harder.
Choosing the right partner for this transformation is a big decision. To make it easier, we’ve rounded up the Top 10 Application Modernisation Companies: trusted experts who can turn your legacy systems into assets that drive growth.
This guide is packed with insights to help you find the perfect fit and take the next step in your digital journey.
The best application modernisation companies in this ranking are Imaginary Cloud, Taazaa Inc., Appify, Vardot, AppIt Ventures, Code District, Darwoft, Kin + Carta, IT Path Solutions and Altkom Software. All ten are top-ranked on Clutch with a rating of 4.8 or higher. Each profile covers services, clients, reviews, location, size and price.
Best suitable for: Scale-ups, Enterprises
Brief description: Imaginary Cloud designs scalable technology, and their proprietary development processes guarantee reliable, user-centred solutions that drive seamless digital transformation for Enterprise and Scale-up companies.
They are passionate about helping organisations scale, having worked with many customers. They have received numerous honours over the previous 13 years, including Top 100 Fastest Growing Companies, Top 1000 Global Companies in 2020 and 2021, UK Top B2B Company in 2021 and 2022, and Europe Best Workplace® 2022.
Services: Product ideation: Digital Transformation, Digital Acceleration, Scoping sessions, Product Design Process, MVP. Product development: Web and Mobile Development, Artificial Intelligence, UX/UI Design. Product improvement: Code Audit, UX Audit.
Technologies: React, Next.JS, Angular, Vue, Webflow, Ruby on Rails, Node, Python, Rails, Django, React Native, Flutter, AWS, Azure, Google Cloud
Key clients: Nokia, Sage, Ernst & Young, BNP Paribas, TravelWiFi, JingaLife, Elsa, Trust Portal, Remax, Environment Intelect
Reviews: 4.9 stars on Clutch from 34 reviews
Feedback: "They always deliver on time and are very responsive to changes in scope"; "The team delivered on time and within budget, ultimately helping accelerate the overall process. Moreover, their team members were outstanding"; "We've worked with several developers, but Imaginary Cloud is the only partner that does what they say they'll do."
Methodology: Agile
Location: London, United Kingdom
Company size: 50 - 249
Founded in: 2010
Price range: $50 - $99 / hr
Culture and values: Highly process-oriented, technical excellence, work with the 1% best-in-class Europe-based developers with years of experience across different industries; digital acceleration with a lean mindset; full transparency: they provide transparent and clear communication, project management, and budgeting; they take strong ownership of the projects they work on, meaning you can expect a business partner ready to help you every step of the way.
Find out about the Imaginary Cloud software development service and send a message if you want to talk about your project.
Brief description: Taazaa was created in 2007 with a belief that software could relieve human suffering and a software development service provider should look beyond technologies and deliver creative and progressive solutions.
They assist 100s of startups, SMBs, and Fortune 500 enterprises. They're a top US enterprise software solutions provider and valued technology partner. Their clients acknowledge their top-tier competence and agile software development technique.
Services: Web Application Development, Mobile Application Development, Software Product Development, Cloud Services, Software Solutions, Digital Transformation, Artificial Intelligence, Internet of Things, Augmented Reality, Blockchain Technology, Internet of Things, Big Data Analytics, Virtual Reality, Blockchain, Custom Software Development, UI and UX Development, Product Engineering, DevOps Services, Quality Assurance, Data Engineering and Enterprise Software Development
Key clients: PulseBox, Caring24, Malley’s Chocolates, Lachina, Open i Networks, Vorrei, Wright Partners
Reviews: 5.0 stars on Clutch from 28 reviews
Feedback: "Their ability to take an idea from an industry they are not part of and make it happen is impressive", "The staff at Taazaa were very cooperative with our stringent deadlines and work hours", "They guide throughout the process and provide rational to the decision they make."
Location: Hudson, OH, United States. Development team: India.
Company size: 50 - 249
Founded in: 2007
Price range: $50 - $99 / hr
Brief description: Delivering world-class client experiences is critical in today's customer-driven economy. Their purpose is to assist you in deploying world-class mobile apps that deliver those experiences. They deploy mobile solutions to engage, service, and delight users.
Appify designs, develops, and maintains mobile applications for clients on all platforms, including iOS, Android, and Hybrid. They use agile development approaches and encourage their clients to construct solutions in an iterative manner. This enables intelligent, ongoing optimisation of the user experience.
Services: Mobile application development, Mobile consultancy, Mobile marketing, Mobile web development, Mobile UX/UI
Key clients: NHS, RecoverMe, Way2Work, TrainedIn, MyBubble
Reviews: 5.0 stars on Clutch from 20 reviews
Feedback: "They were friendly, professional, and efficient," "Working with Appify was an exceptional experience," "What's really impressive was a value-driven engagement with Appify."
Location: London, England. Development team: Serbia.
Company size: 10 - 49
Founded in: 2019
Price range: undisclosed
Brief description: Vardot is a global web development and design solutions company that uses open-source technology to assist organisations with digital transformation. They take a holistic approach to project management and advise their clients through every stage of the project lifecycle.
Services: Strategy, Design, Development, Migration, Support and Maintenance, DevOps, Digital Marketing
Key clients: UNICEF, United Nations, BCG, Georgetown University
Reviews: 4.9 stars on Clutch from 55 reviews
Feedback: "We felt like we were working with a true partner rather than a vendor," "They were flexible and maintained an open mind in going through all the complex aspects of our website," "Overall, we've had a great experience working together."
Location: Santa Clara, CA, United States. Development team: Jordan.
Company size: 50 - 249
Founded in: 2011
Price range: $100 - $149 / hr
Brief description: Since its establishment in 2012, AppIt has produced hundreds of high-quality applications and custom software solutions to happy clients ranging from local small and medium-sized businesses to Fortune 500 companies. Their reputation for creating world-class mobile and web-based applications that increase customer bases and bottom lines has progressively developed over time. Their staff will guide you through every stage of the software development process in a transparent and consultative manner.
Services: Mobile Application Development, Web Application Development, Database, Server, and API Development, Business Intelligence/Artificial Intelligence, UX/UI Design and Development, ERP/CRM/CMS Integration and Customisation, Legacy System Upgrades and Integrations, Code Audits, Staff Augmentation
Key clients: The State of Colorado
Reviews: 4.9 stars on Clutch from 35 reviews
Feedback: "We were impressed by their weekly and often daily communication on the progress of the project" "I must commend the team at AppIt Ventures for their exceptional professionalism," "They have a thoughtful team that was instrumental in solving development problems along the way."
Location: Denver, CO, United States. Development team: India.
Company size: 10 - 49
Founded in: 2012
Price range: $100 - $149 / hr
Brief description: They work collaboratively with technology and business leaders from many industries to accelerate organisational growth via AI-powered, purpose-built software solutions. Their reputation for speed, cost-effectiveness, and dependability is well-deserved: they use tried-and-true platforms and models, customising them to your specifications and producing custom code as needed. This "tested and tailored" approach is what distinguishes them and allows them to deliver solutions flawlessly.
They'll collaborate to develop solutions that have a long-term influence on your organisation by combining your industry knowledge with their technical experience.
Services: Custom Software Development, Software Testing and QA Services, Web Application Development, Software Design and Prototyping, Mobile Application Development, Dedicated Development Teams, Internet of Things, UI/UX, Enterprise Mobility, Data Science, Business Process Automation, Artificial Intelligence, and Application Modernisation
Key clients: AstraZeneca, Caribbean Airlines
Reviews: 4.9 stars on Clutch from 33 reviews
Feedback: "We appreciated their open, honest, and forthright communication at all times," "The team has taken our jumbled idea and turned it into something that works, and we’re happy about that," "Code District adopts a design-first approach, emphasising the importance of UI/UX in their development process."
Location: Washington, DC, United States. Development team: Pakistan.
Company size: 50 - 249
Founded in: 2017
Price range: $25 - $49 / hr
Brief description: Darwoft works with customers to provide a great experience for users. Their company specialises in high-quality and scalable MVP work, resulting in a robust code base that a startup development team may build on. Their core values are technical excellence, transparency, collaboration, innovation, and customer orientation.
Their stack is regularly updated in the high-tech market, focussing on digital transformation, mobile innovation, the internet of things, machine learning, and cloud-native solutions.
Services: MVP Development, Data-driven strategies, Staff Augmentation
Key clients: QTalent, Hometown, VML, Coca Cola Andina, HAVAS, Valdera
Reviews: 4.9 stars on Clutch from 25 reviews
Feedback: "Darwoft does a fantastic job of finding the right people to work for us," "The fact that they delivered on their promises was the biggest success metric for us," "Their leaders are always open to listening to my needs and providing solutions to unforeseen events."
Location: Portland, OR, United States. Development team: Argentina.
Company size: 50 - 249
Founded in: 2010
Price range: $25 - $49 / hr
Brief description: Kin + Carta is a worldwide digital transformation firm dedicated to creating a world that works better for everyone. Its consultants, engineers, and data scientists use the power of technology, data, and expertise to the world's most powerful businesses. Kin + Carta, a recognised B Corp with a triple-bottom-line focus on performance, people, and the environment, enables organisations to create strategic, inclusive, and sustainable products, platforms, and services.
Services: Cloud and Platforms, Data and AI, Experience and Product, Managed Services, Strategy and Innovation
Key clients: Lexus, AstraZeneca
Reviews: 4.8 stars on Clutch from 70 reviews
Feedback: "We’re very satisfied with their work and have no complaints," "We were most impressed with their communication skills," "This partnership helped us understand what our next steps should be as a company moving forward."
Location: London, England
Company size: 1,000 - 9,999
Founded in: 1964
Price range: undisclosed
Brief description: IT Path Solutions is a leading technology consulting and solution development company with offices in the United States, the United Kingdom, and India.
They are global innovation partners who have pioneered services over the last decade, successfully working with 29+ countries, 3700+ projects, and 219+ clients across 19+ business verticals.
Services: Custom Web and Mobile App Development, Startup and Enterprise Product Engineering, AI, IoT and Blockchain Apps, Cloud Consulting and Migration
Key clients: Digital Civic - E Citizen
Reviews: 4.8 stars on Clutch from 29 reviews
Feedback: “I liked that they were responsive enough at our convenient time", “The workflow is collaborative, effective, and timely”, “They’re quick in completing their tasks”, “We loved their support even on the changes I required, and nothing was any trouble at all.”
Location: Harrow, United Kingdom. Development team: India
Company size: 50 - 249
Founded in: 2012
Price range: < $25 / hr
Brief description: Altkom Software is a custom software development company with more than 20 years of experience. They have effectively designed the path to success for innumerable businesses and they collaborate with the most well-known brands, including multinational enterprises, rapidly rising businesses, and start-ups.
Services: Software Engineering, Strategy and Digital Product Design, Process Automation and Workflow, Cloud Services, Data and Analytics
Key clients: BNP Paribas
Reviews: 4.8 stars on Clutch from 28 reviews
Feedback: "The process of conducting the security tests was clear and understandable," "I was most impressed with their involvement in the project and team communication skills," "They worked fast and according to high market standards and solutions."
Location: London, England. Development team: Poland.
Company size: 250 - 999
Founded in: 2000
Price range: $50 - $99 / hr
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To choose the right application modernisation company, weigh seven things: experience and expertise, technical capabilities, client references, service scope and support, flexibility, budget and ROI, and timelines. Each criterion below comes with a Pro Tip. Use them to compare shortlisted partners on evidence, not on sales promises.
The more experienced the company, the better equipped they are to handle your unique challenges. Experience not only ensures technical proficiency but also shows their ability to adapt to different industries and needs.
Pro Tip: Ask for a portfolio or case studies demonstrating their past work on similar systems and industries.
A good application modernisation company combines strong technical capabilities with proven client references and clear post-modernisation support. Check their skills in Kubernetes, Docker, microservices and the main cloud platforms, ask for testimonials and case studies, and confirm they offer maintenance, training and a tailored roadmap once the project ends.
Technical skills and the ability to work with modern frameworks are non-negotiable. The right partner should be ahead of the curve with their tech stack and offer future-proof solutions.
Pro Tip: Ask how they incorporate emerging technologies like AI, machine learning, and edge computing into their strategies.
Reputation is one of the most reliable indicators of a company’s success. Investigating their past projects will give you insights into their performance and reliability.
Pro Tip: Visit independent review platforms or forums to see what clients have to say about their experiences.
Modernisation is about the initial project, but also the ongoing support is equally important for long-term success.
Pro Tip: Ask about service level agreements (SLAs) for support and their average response times for post-modernisation issues.
Pick an application modernisation company that adapts to your needs, shows transparent pricing and ROI projections, and has a record of on-time delivery. The cheapest option is rarely the best, so compare quotes on value and ask for a milestone timeline at proposal stage to keep your partner accountable.
No two businesses are the same, so avoid companies offering cookie-cutter solutions.
Pro Tip: During the consultation phase, assess how well they listen to your needs and provide thoughtful, tailored suggestions.
While cost is an important factor, it shouldn’t overshadow value. The cheapest option isn’t always the best.
Pro Tip: Compare quotes from multiple vendors, but prioritise those who align with your goals and provide evidence of measurable success.
A modernisation project that drags on can disrupt operations and incur extra costs. Ensure your partner has a proven track record of delivering on time.
Pro Tip: Request a detailed timeline with milestones during the proposal stage to ensure accountability.
Here's a detailed checklist to help you make an informed decision:
Partnering with an application modernisation company gives you faster systems, lower running costs, easier scaling, stronger security and compliance, access to newer technology and better resilience. Modernising legacy systems can feel daunting (it is a big job), but the right experts bring the tools, insights and strategies for a smooth transition. Here’s how your business can benefit:
Outdated systems often struggle to keep up with modern demands, leading to slow processes and frustrated users. Modernisation improves performance by optimising code, introducing newer technologies, and leveraging high-performance infrastructure.
Example: A logistics company that modernised its tracking system reported a 40% reduction in response times, boosting customer satisfaction.
Legacy systems can drain resources due to high maintenance costs and inefficiencies. Application modernisation reduces these expenses by eliminating technical debt and streamlining operations.
Pro Tip: While modernisation requires an upfront investment, the long-term savings in IT maintenance and resource allocation can significantly outweigh the costs.
Application modernisation lets your systems scale up or down with demand and strengthens security and compliance. Cloud-based infrastructure copes with growth and seasonal spikes, while encryption, multi-factor authentication and threat detection protect sensitive data and help you meet regulations such as GDPR, HIPAA or PCI DSS.
Modernised systems are designed to grow with your business. Whether you’re expanding operations, adding new services, or handling seasonal spikes in demand, scalability ensures your systems can adapt.
Example: E-commerce platforms often modernise their applications to handle traffic surges during sales events without impacting performance.
Legacy systems can expose businesses to vulnerabilities and compliance risks. Modernisation introduces robust security measures to safeguard sensitive data.
Pro Tip: Modernised systems also offer better incident response capabilities, helping your business mitigate risks more effectively.
Application modernisation opens the door to cloud computing, AI, machine learning and microservices, while improving uptime and disaster recovery. It also gives you a competitive edge, faster product launches and systems that stay relevant for years. Here is how each of those benefits works in practice.
Modernisation enables businesses to leverage cutting-edge technologies that were previously out of reach.
Example: A manufacturing company that integrated IoT and AI into its modernised system reported an improvement in production efficiency.
Old systems are prone to failures that can disrupt operations. Modernisation ensures higher reliability and uptime, keeping your business running smoothly.
Pro Tip: Many modernisation solutions include built-in disaster recovery plans, ensuring quick recovery even in the face of unexpected issues.
By modernising your applications, you gain a technological edge over competitors still relying on outdated systems.
Modernisation ensures your systems remain relevant in the years to come.
Pro Tip: Choose a partner that prioritises future-proofing, so your systems stay adaptable to emerging trends and technologies.
This application modernisation companies ranking is built on Clutch, a platform of verified client reviews and ratings. A company qualifies if it ranks near the top for application modernisation in the United States and the United Kingdom, has at least 10 Clutch reviews and a 4.8 rating or higher, has 5+ years in the market, and has a proven portfolio.
We have considered Clutch to build this leaderboard since Clutch is a company that helps businesses find the best service providers for their needs through study and reviews. They offer verified client reviews and ratings and in-depth research and analysis on companies in many fields, such as web app development, marketing, design, and more. Clutch's goal is to help businesses choose service providers based on good information, show off their skills, and get noticed for their work.
The companies part of this leaderboard meet the following requirements:
This information is not sponsorship and is based on our analysis.
To choose an application modernisation company, follow seven steps: shortlist three to five providers, schedule consultations, request detailed proposals, evaluate security and compliance, assess the team, check contract flexibility, then decide. Work through them in order and you compare partners on evidence, not promises.
Now that you understand the benefits and have a clear idea of what to look for in a partner, it’s time to take actionable steps to make the right choice. Follow these steps to streamline your decision-making process and select a company that aligns with your goals:
Use the information in this guide to create a shortlist of 3–5 companies that meet your criteria.
Pro Tip: Check independent review platforms like Clutch or G2 for unbiased client feedback.
Engage with the shortlisted companies through consultations to assess their approach and compatibility.
Questions to Ask During Consultations:
Ask the companies to submit detailed proposals outlining their modernisation strategy, project timeline, and cost breakdown.
Pro Tip: Compare proposals not just on cost but on value: focus on how well the solution meets your needs and guarantees ROI.
The final four steps are to evaluate security and compliance, assess the team and resources, check contract flexibility, and make your decision. Verify encryption and regulatory compliance, meet the people who will do the work, look for adjustable terms, and set regular check-ins from the start of the partnership.
Modernisation often involves handling sensitive data, so security should be a top priority.
Get to know the team members who will be working on your project.
Pro Tip: A dedicated account manager or project lead is a good sign of clear communication and accountability.
Ensure the company offers flexibility to adapt the project scope if your requirements evolve.
Once you’ve reviewed all proposals and completed your evaluations, choose the company that best aligns with your business needs and values.
The right application modernisation partner turns legacy systems into a platform for growth. Modernising is about upgrading technology and transforming your business for the future, so choose a partner that offers efficiency, scalability and a competitive edge. Weigh experience, references, security and support before you sign.
Ready to take the next step? Contact our team today for expert guidance on finding the perfect modernisation solution tailored to your needs. Let us help you future-proof your business and achieve your goals.
Alexandra Mendes is a Senior Growth Specialist at Imaginary Cloud with 3+ years of experience writing about software development, AI, and digital transformation. After completing a frontend development course, Alexandra picked up some hands-on coding skills and now works closely with technical teams. Passionate about how new technologies shape business and society, Alexandra enjoys turning complex topics into clear, helpful content for decision-makers.
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