Migrating apps isn’t just about shifting code from one server to another. It’s about minimizing disruption, maximizing performance, and making sure your team doesn’t lose sleep during the process. If you’re in the UK and thinking about moving your software stack to the cloud, a new platform, or even a different provider, you’re in the right place. We’ve looked into the top application migration companies across the UK that actually know what they’re doing. Not just buzzwords and shiny sales decks – we’re talking real migration experts who can handle the messy bits too.
1. A-listware
At A-listware, we approach application migration with flexibility and a focus on seamless integration. Our teams work closely with clients to transition apps across platforms, cloud services, or infrastructures without causing unnecessary disruption. Depending on the project scope, we can provide dedicated engineers, agile pods, or high-level consultants to handle both strategic planning and hands-on execution. The goal is to make the process straightforward, without overcomplicating it or slowing down operations.
We’re used to adapting our methods to fit startups, SMBs, and enterprise clients. Whether a business needs to modernize legacy systems or move to a new cloud environment, we offer different models to support that migration effectively. Our engineers become part of the client’s workflow, either fully embedded or operating alongside in-house teams. With 24/7 availability and a broad tech stack, we’re positioned to support migrations that involve web, mobile, backend systems, and more.
Key Highlights:
- Offers dedicated teams or agile pods tailored to project needs
- Provides 24/7 access to experienced engineers and support
- Multiple engagement models including time-based, outcome-based, and full project delivery
- Focuses on smooth team integration and transparent workflows
- Works with businesses of all sizes, from startups to large enterprises
Services:
- Application Services and Migration
- Infrastructure and Cloud Management
- Software and Web Development
- Agile Engineering Teams
- UI/UX Design
- IT Consulting and Support
- Testing and Quality Assurance
- Cybersecurity and Data Analytics
- Solutions for ERP, CRM, HR systems, and more across multiple industries
Contact Information:
- Website: a-listware.com
- Phone: +44 (0)142 439 01 40
- Email: info@a-listware.com
- Address: St. Leonards-On-Sea, TN37 7TA, UK
- LinkedIn: www.linkedin.com/company/a-listware
- Facebook: www.facebook.com/alistware
2. CirrusHQ
CirrusHQ focuses on AWS-based application migration for UK organizations looking to move to, optimize, or expand their cloud presence. They support different stages of cloud maturity, from initial adoption to more advanced, automated DevOps environments. Their process typically includes developing a tailored migration strategy, implementing infrastructure-as-code, and ensuring compliance with security requirements.
They tend to work with businesses whose operations depend heavily on IT platforms and who are looking to improve cloud performance, manage costs, and increase resilience. Their services are grounded in AWS best practices and built around long-term cloud optimization. This often includes hands-on guidance, detailed assessments, and managed services to help maintain cloud environments post-migration.
Key Highlights:
- AWS-focused services with certified expertise
- Tailors migration support to different levels of cloud maturity
- Works with hybrid, single, and multi-cloud environments
- Offers infrastructure-as-code and governance policies
- Combines migration with security and cost optimization
Services:
- Application Migration to AWS
- Cloud Infrastructure Design and Management
- DevOps and Infrastructure-as-Code Implementation
- Digital Transformation Planning
- Cloud Governance and Compliance
- Ongoing AWS Optimization and Support
- Consulting and Strategy Development
- Cloud Architecture Review and Assessment
Contact Information:
- Website: cirrushq.com
- E-mail: info@cirrushq.com
- Facebook: www.facebook.com/CirrusHQ
- Twitter: x.com/cirrushq
- Address: CirrusHQ Ltd, Twenty Old Bailey, London, UK
- Phone: 0208 057 8007
3. Armakuni
Armakuni focuses on helping companies adopt cloud-native practices while improving how they build and deploy applications. Their migration work is part of a broader engineering uplift process that includes restructuring how teams operate and designing resilient, scalable systems. Rather than simply moving applications, they embed their engineers into client teams to build internal capabilities and shift workflows toward high-velocity delivery.
They work across industries including finance, healthcare, and telecom, with a process centered around what they call “The AK Way.” This method combines metrics, coaching, and hands-on support to help teams improve speed, reliability, and alignment with customer needs. Cloud-native delivery and automation are key elements in their migration and transformation projects.
Key Highlights:
- Uses a defined engineering approach called “The AK Way”
- Embeds engineers directly into client teams for collaboration
- Supports high-scale, resilient system design and delivery
- Focuses on long-term internal capability building
- Applies detailed metrics to measure engineering outcomes
Services:
- Application Migration to Cloud-Native Environments
- Embedded Engineering Teams
- DevOps and Infrastructure Automation
- Cloud-Native System Design
- Agile Delivery Enablement
- Technical Training and Coaching
- Digital Transformation Strategy
- Engineering Benchmarking and Metrics Reporting
Contact Information:
- Website: www.armakuni.com
- E-mail: hello@armakuni.com
- Facebook: www.facebook.com/armakuni.uk
- Twitter: x.com/armakunihq
- LinkedIn: www.linkedin.com/company/armakuni
- Instagram: www.instagram.com/armakunihq
- Address: 124 City Road London, EC1V 2NX, UK
- Phone: +44 (0)207 459 4330
4. Accenture
Accenture provides application migration services as part of its larger cloud and technology transformation offerings. Their approach includes working across cloud platforms, designing secure and scalable infrastructures, and integrating new technologies where needed. Migration is often positioned within a broader digital reinvention process that may involve data platforms, cybersecurity frameworks, and AI capabilities.
They work with a wide range of industries and offer access to a large ecosystem of technology partners. Application migration projects can vary in scope, from rehosting legacy systems to redesigning full digital platforms. Their services are generally aimed at helping clients meet long-term operational goals and keep pace with shifting technology demands.
Key Highlights:
- Offers platform-agnostic cloud migration services
- Works with major ecosystem partners (AWS, Microsoft, Google, etc.)
- Positions migration within broader digital transformation plans
- Operates across multiple sectors and enterprise environments
- Supports integration of emerging technologies and data solutions
Services:
- Application and Infrastructure Migration
- Cloud Platform Engineering
- Cybersecurity and Compliance
- Data and AI Integration
- Technology and Strategy Consulting
- Managed Services and Support
- ERP and CRM Migration
- System Modernization and Optimization
Contact Information:
- Website: www.accenture.com
- Address: Cornerblock, 2 Cornwall Street, Birmingham, West Midlands, United Kingdom
- Phone: +441215162501
5. Capgemini
Capgemini supports organizations in managing cloud-based transitions as part of broader digital transformation goals. Their application migration services are tied into a larger focus on enterprise systems, customer experience, and operational efficiency. They use cloud, AI, and data capabilities to reshape how businesses approach their tech infrastructure, often tailoring solutions based on sector-specific requirements. Their work spans both planning and execution, helping clients adapt their systems while keeping security, compliance, and sustainability in view.
They engage with clients across industries including finance, manufacturing, retail, and public sector, bringing in teams that manage migrations from legacy platforms to modern, cloud-aligned environments. Their approach connects technical delivery with business priorities, aligning application changes with overall enterprise strategies. Cloud adoption, intelligent platforms, and system integrations are usually part of the process.
Key Highlights:
- Covers both technical migration and enterprise system alignment
- Works across a broad range of industries with tailored approaches
- Supports large-scale transformations that include cloud, AI, and automation
- Includes cybersecurity and sustainability in tech planning
- Focuses on long-term integration with business operations
Services:
- Cloud Migration and Management
- Enterprise Application Transformation
- Cybersecurity and Compliance Support
- AI and Data Strategy Integration
- Customer Experience and CRM Migration
- Digital Engineering and Platform Services
- Industry-Specific Technology Solutions
- Intelligent Operations and IT Optimization
Contact Information:
- Website: www.capgemini.com
- Facebook: www.facebook.com/capgemini
- LinkedIn: www.linkedin.com/company/capgemini
- Instagram: www.instagram.com/capgemini
- Address: Unit 12 Brabazon Office Park, Golf Course Lane, Filton Bristol, UK, BS34 7PZ
- Phone: +44 (0) 330 588 8000
6. Deloitte
Deloitte handles application migration as part of their broader digital and enterprise services. Their teams work with businesses to shift platforms, modernize legacy systems, and restructure core technologies in a way that supports overall transformation. They provide both strategic guidance and technical execution, depending on where the client is in their tech roadmap. The focus is often on aligning business functions with scalable, modern solutions that improve performance and control costs.
They take a layered approach that often includes risk analysis, data integration, and security planning alongside the migration work. Their migration services are integrated into offerings like cloud optimization, cybersecurity, and AI-driven systems. The company supports a variety of industries and adapts their model to suit client-specific structures, whether the task is isolated to one system or part of a larger IT overhaul.
Key Highlights:
- Supports full or partial application migration projects
- Works across regulated and complex environments
- Provides multi-disciplinary teams combining tech, risk, and strategy
- Ties application migration to long-term tech modernization goals
- Adapts delivery models to suit large and small organizations
Services:
- Application and Platform Migration
- Cloud Engineering and Integration
- Enterprise IT and Performance Management
- Cybersecurity and Risk Management
- AI and Data Analytics
- Regulatory and Compliance Support
- Digital Transformation Planning
- Technology Strategy and Implementation
Contact Information:
- Website: www.deloitte.com
- Facebook: www.facebook.com/Deloitte
- Twitter: x.com/deloitte
- LinkedIn: www.linkedin.com/company/deloitte
- Address: 1 New Street Square London, EC4A 3HQ United Kingdom
- Phone: +44 (0)20 7936 3000
7. Hexaware
Hexaware offers application migration services as part of a broader portfolio that spans cloud, data, automation, and digital operations. Their migration work typically includes assessing legacy applications, replatforming them to cloud environments, and integrating them into modern enterprise systems. Depending on the business needs, they can either rebuild applications or move them with minimal disruption using automated tooling and standard processes.
They often work with organizations undergoing full-stack transformations, especially those aiming to connect application changes with wider operational improvements. Cloud services, enterprise platform upgrades, and cybersecurity are often delivered together as part of a cohesive migration plan. Their teams operate across industries and handle both customer-facing and internal application environments.
Key Highlights:
- Offers cloud-aligned migration for legacy systems
- Connects migration services with broader platform and infrastructure upgrades
- Uses automation and data strategies to support migration efficiency
- Provides post-migration operational and security support
- Supports global delivery through distributed team models
Services:
- Application Migration and Modernization
- Cloud Engineering and Deployment
- Cybersecurity Services
- Data and AI Integration
- Enterprise Platform Support
- IT Operations Management
- Testing and Automation
- Digital Workplace and Business Process Services
Contact Information:
- Website: hexaware.com
- Facebook: www.facebook.com/HexawareTechnologies
- Twitter: x.com/hexawareglobal
- LinkedIn: www.linkedin.com/company/hexaware-technologies
- Instagram: www.instagram.com/hexaware_global
- Address: Part Level 32, One Canada Square, Canary Wharf, London E14 5AB, United Kingdom
8. Transparity
Transparity provides application migration services focused on moving workloads to Microsoft Azure. Their approach is built around Microsoft’s Cloud Adoption Framework, which gives structure to each phase of the migration process. They support various scenarios, including transitions from on-prem systems, private cloud setups, and other public cloud providers. Their teams handle planning, execution, and post-migration governance, aiming to help organizations reduce complexity while keeping services available during the move.
They work with businesses that use a mix of technologies, covering Windows, Linux, enterprise apps, and virtual desktops. Transparity also provides tools and ongoing managed services to help clients monitor, optimize, and maintain their Azure environments after the migration is complete. They place emphasis on flexibility, offering hybrid setups and guidance on how to align infrastructure to current and future business needs.
Key Highlights:
- Uses Microsoft’s Cloud Adoption Framework for structured migration
- Handles both infrastructure and application-level migrations
- Supports hybrid environments using Azure Arc
- Works with Windows, Linux, VMware, and open-source platforms
- Offers managed services for continued Azure operations
Services:
- Azure Cloud Migration
- Windows and SQL Server Migration
- Enterprise Application Modernisation
- Linux and Open-Source Workload Migration
- Azure VMware Solution Integration
- Azure Virtual Desktop Setup
- Hybrid Cloud Enablement
- Azure Managed Services
Contact Information:
- Website: www.transparity.com
- E-mail: contact@transparity.com
- LinkedIn: www.linkedin.com/company/transparity
- Address: 100 Wharfedale Road, Winnersh, Wokingham RG41 5RD, UK
- Phone: 01202 139255
9. Virtusa
Virtusa delivers application migration as part of broader IT modernization projects. Their work typically involves upgrading legacy systems, implementing DevOps automation, and shifting enterprise platforms to cloud-native models. They apply a combination of engineering practices and domain expertise to help organizations rework outdated systems and better align them with business goals. Migration projects often come with changes in how software is built, delivered, and maintained across departments.
They have experience across a range of industries, including finance, healthcare, and insurance, and often work on complex transformations involving automation, AI, and cloud services. Their migration approach is tightly linked with long-term business efficiency goals, not just infrastructure change. In some cases, they embed teams directly with clients to accelerate delivery or streamline existing operations with unified platforms.
Key Highlights:
- Combines migration with IT modernization and DevOps automation
- Supports industry-specific use cases and regulatory needs
- Focuses on agile delivery and scalable infrastructure
- Works with both public cloud and on-prem hybrid environments
- Collaborates with clients across financial, health, and tech sectors
Services:
- Legacy Application Modernisation
- Cloud Platform Migration
- DevOps and Infrastructure Automation
- Custom Application Development
- Unified Source Code and Deployment Setup
- AI and Intelligent Workflow Integration
- Engineering and Delivery Acceleration
- Business Process Optimization
Contact Information:
- Website: www.virtusa.com
- Facebook: www.facebook.com/virtusa.corporate
- Twitter: x.com/VirtusaCorp
- LinkedIn: www.linkedin.com/company/virtusa
- Instagram: www.instagram.com/virtusacorp
- Address: 26 Finsbury Square, Level 8 London, United Kingdom
- Phone: +442036517800
10. Intellias
Intellias works with clients on application migration as part of broader software and digital transformation projects. Their teams support the move from legacy platforms to scalable cloud environments, while also helping companies re-architect applications for long-term adaptability. This includes both back-end systems and customer-facing platforms. They also integrate security, testing, and automation into their migration work to reduce risk and keep delivery timelines realistic.
They serve industries like automotive, fintech, telecom, logistics, and agriculture, with projects ranging from basic application transitions to full platform redevelopment. Their migration services are usually supported by their cloud, DevOps, and data engineering practices, making it easier for clients to maintain momentum after the initial handover. Their model allows for long-term collaboration or focused project work, depending on the business need.
Key Highlights:
- Offers tailored migration plans based on industry-specific needs
- Supports complex transitions involving legacy system upgrades
- Combines software engineering with platform modernization
- Works across cloud, DevOps, and data technologies
- Provides end-to-end support from planning through operation
Services:
- Application Modernisation and Migration
- Cloud Platform Engineering
- Custom Software Development
- DevOps and Infrastructure Automation
- Managed Support and Maintenance
- Cybersecurity and Testing Services
- Data and Analytics Integration
- Platform Redevelopment and Optimization
Contact Information:
- Website: intellias.com
- Facebook: www.facebook.com/Intellias.GlobalPage
- LinkedIn: www.linkedin.com/company/intellias
- Instagram: www.instagram.com/intellias_global
- Address: Guilford GU1 4QF, College Road, Andrews House, Suite 6, 2nd floor, UK
- Phone: +44 7899 043879
11. Versich
Versich offers application-related services within broader digital transformation work, with a focus on custom development and system integration. Their teams help businesses move toward new platforms by building or adjusting applications to meet current standards or infrastructure requirements. While not positioned strictly as a migration firm, they support businesses looking to modernize software ecosystems, adopt cloud services, or enhance data visibility through tools like Power BI and NetSuite.
Their work typically blends application design, data solutions, and platform consulting, which allows them to support migration tasks such as transitioning from legacy systems, implementing cloud-based operations, or connecting new apps with existing systems. They are active in finance transformation, analytics, and platform optimization, which complements their migration support.
Key Highlights:
- Focus on app development with ties to transformation projects
- Experience across web platforms, SaaS, and ERP systems
- Supports transition to cloud-based tools like NetSuite
- Includes data integration and business analytics capabilities
- Offers end-to-end support including managed services
Services:
- Application Modernisation and Development
- NetSuite Implementation and Managed Services
- Power BI Reporting and Visualization
- Cloud-based Data Integration
- Finance Platform Transformation
- Business Analytics and Dashboards
- Ongoing Application Support
Contact Information:
- Website: versich.com
- E-mail: info@versich.com
- Facebook: www.facebook.com/versichltd
- Twitter: x.com/versich_ltd
- LinkedIn: www.linkedin.com/company/versich
- Instagram: www.instagram.com/versich_uk
- Address: Broad House, Imperial Drive HA2 7BL London, United Kingdom
- Phone: (+44) 7782350419
12. Infopoly
Infopoly helps businesses manage, migrate, and optimize data systems with a strong focus on quality and automation. Their services support complex cloud-based environments and include both application and infrastructure work. They often partner with companies moving from legacy tools to more agile, cloud-native architectures. Their process blends design, delivery, and long-term support, with particular attention to data governance and system performance.
They work with a broad tech stack, including Azure, AWS, Snowflake, and Databricks, which makes them capable of managing projects that combine application migration with advanced analytics, release automation, or quality assurance. While their main focus is data, many of their services involve application ecosystems that require updates, migration, or redesign to support current business demands.
Key Highlights:
- Strong emphasis on data migration and quality controls
- Offers cloud-native solutions with infrastructure automation
- Supports full cycle from design to post-launch support
- Uses tools like Terraform, DevSecOps, and Power BI
- Provides release and QA services for app ecosystems
Services:
- Cloud Management and Automation (CMA)
- Application Migration and Optimization
- Data Engineering and Warehousing
- Quality Management as a Service (QMS)
- Release and Deployment Management (RMS)
- Web Platform Redesign and Maintenance
- Data Visualization and Reporting (Power BI)
Contact Information:
- Website: www.infopoly.com
- E-mail: contact@infopoly.com
- LinkedIn: www.linkedin.com/company/infopoly-ltd
- Address: Everdene House, Deansleigh Rd, Bournemouth BH7 7DU, UK
- Phone: +44 207 175 5616
13. Opus Technology
Opus Technology delivers cloud and application migration support through its cloud transformation and managed IT services. They assist organizations moving from legacy infrastructure to cloud-based setups, often focusing on call centers, communications systems, and integrated customer experience platforms. Migration efforts typically include reconfiguring telephony, deploying Microsoft-based solutions, and integrating automation tools.
Their projects are usually tied to modernizing workflows, especially in customer-facing environments. They provide support for Microsoft Azure, Teams, and security products alongside migration. Their approach combines infrastructure change with app performance tracking, virtual assistant integration, and voice-based automation, aiming to align IT platforms with evolving business operations.
Key Highlights:
- Focuses on migration within communication and contact center environments
- Offers Microsoft-based services and cloud platform setup
- Supports automation and AI integrations post-migration
- Handles telephony and unified communications alongside apps
- Provides ongoing IT support and system monitoring
Services:
- Cloud Migration and Infrastructure Setup
- Microsoft 365 and Azure Implementation
- Unified Communications and Voice Services
- Application Performance Monitoring
- Conversational AI and Chatbot Integration
- Managed IT and Cloud Support
- Cybersecurity and Endpoint Protection
Contact Information:
- Website: www.opustech.co.uk
- LinkedIn: www.linkedin.com/company/opustechnology
- Address: 60 Cannon Street London, UK, EC4N 6NP
- Phone: 0800 047 3970
14. UXLI
UXLI focuses on data-driven services that often intersect with application migration. They help organizations plan and execute migrations to the cloud while improving the structure and quality of their data. Their role in application migration usually starts with evaluating a company’s data readiness, then moving workloads in a way that aligns with long-term data strategy and analytics goals.
Their services are tailored to fit organizations that want to better manage and use data as part of a wider technology shift. Whether a company is shifting to a cloud-based environment or modernizing internal systems, UXLI works on making that transition smoother by handling the back-end data aspects and maintaining analytics continuity through the move.
Key Highlights:
- Specializes in cloud-based data migration
- Focuses on analytics, reporting, and data quality
- Helps align application changes with long-term data strategy
- Offers planning and managed support throughout migration
- Works with global teams to deliver custom solutions
Services:
- Data Strategy Consulting
- Cloud Migration
- BI and Data Analytics
- Data Management
- Managed Data Services
Contact Information:
- Website: www.uxli.com
- E-mail: info@uxli.co.uk
- Facebook: www.facebook.com/uxliltd
- Twitter: x.com/uxliltd
- LinkedIn: www.linkedin.com/company/uxli
- Address: Suite 14-7, Linford Forum, 18 Rockingham Dr, Linford Wood, Milton Keynes,UK
- Phone: +44(0) 203 006 5706
15. Sereno IT
Sereno IT supports small and medium-sized businesses with managed IT services that include cloud migration and IT infrastructure transitions. Their approach combines hands-on support with a people-first philosophy. They often work with companies facing recurring tech issues or lacking internal IT teams, stepping in to provide both support and structured solutions like application and system migration to cloud-based environments.
Migration projects are often bundled into wider IT improvement efforts, including Microsoft 365 adoption, backup solutions, and cybersecurity. Sereno also helps clients move away from legacy systems or inconsistent IT setups, offering planning and cost-sharing options to ease the financial side of migration. Their team operates from London, but they support remote and hybrid work environments as well.
Key Highlights:
- Offers cloud migration as part of wider IT support
- Works closely with businesses lacking internal IT teams
- Emphasizes automation and long-term fixes
- Provides 30-day rolling contracts with no lock-in
- Covers a portion of migration costs for qualified projects
Services:
- Cloud Computing and Migration
- IT Strategy and Planning
- Microsoft 365 Integration
- Backup and Data Recovery
- Cybersecurity and Endpoint Protection
- Managed IT Support
- VoIP and Communications
Contact Information:
- Website: www.serenoit.co.uk
- E-mail: hello@serenoit.co.uk
- Facebook: www.facebook.com/people/Sereno-IT-Support-Ltd
- Twitter: x.com/Serenoitsupport
- LinkedIn: www.linkedin.com/company/sereno-it-support-ltd
- Address: 20 Red Lion St, London WC1R 4PS, UK
- Phone: 0207 139 40 20
16. Ivinco
Ivinco works with companies that need to migrate complex applications to modern, scalable infrastructures. They specialize in moving monolithic systems to microservices, often using Kubernetes and cloud-native tools. Their process includes architecture redesign, system integration, and automation setup to keep deployments reliable and flexible. They also support cases where clients need to go in the opposite direction, migrating from microservices back to a monolith for operational simplicity.
They offer full-stack development and backend support, but their strength is in infrastructure-level changes and managing high-availability systems. Ivinco usually partners with tech teams that need ongoing infrastructure support, from system monitoring to CI/CD pipelines. Their services are used across SaaS platforms, APIs, and high-load systems that require constant uptime.
Key Highlights:
- Focuses on microservices and Kubernetes migration
- Supports hybrid infrastructure and cloud transitions
- Offers 24/7 system monitoring and response
- Can migrate systems in either direction (monolith to microservices or vice versa)
- Builds automation pipelines and deployment tools
Services:
- Application Migration to Microservices
- Kubernetes Integration and Management
- SaaS and API Development
- Cloud and On-Prem Infrastructure Support
- CI/CD Automation
- Full-Stack Web Development
- Custom Software Engineering
Contact Information:
- Website: www.ivinco.com
- E-mail: info@ivinco.com
- LinkedIn: www.linkedin.com/company/ivinco
- Address: Office 22, The Joiners Shop, The Historic Dockyard, ME4 4TZ Chatham, UK
- Phone: +44 2081 338205
Conclusion
Picking the right partner for application migration isn’t about chasing big names or flashy claims. It’s about finding a team that understands the reality of your systems, your goals, and the weird edge cases that never seem to make it into vendor pitch decks. The companies we’ve looked at here each bring something different to the table, some lean into
infrastructure-heavy transitions, others come from a data or development-first angle, and a few do a bit of everything depending on the client.
There’s no one-size-fits-all option in this space, and that’s probably a good thing. Whether you’re dealing with aging internal tools, moving toward a microservices setup, or trying to untangle legacy code during a cloud shift, what matters most is finding a team that can work with what you’ve got and help you get where you’re going without turning everything upside down. That’s really the heart of a solid migration project in the UK tech landscape: practical people solving actual problems, with just enough structure to keep things from going off the rails.
