As we all know, cloud adoption isn’t just a buzzword anymore, it’s the backbone of how UK businesses stay competitive. Moving workloads off legacy systems and into flexible, scalable environments is no longer optional; it’s survival. But getting there isn’t as simple as flicking a switch. Every company has its own mix of old systems, new ambitions, and a mountain of data that needs to work across all of it.
That’s where cloud adoption specialists come in. These are the leading firms that know how to handle the messy details: mapping out migrations, making sure compliance boxes are ticked, and designing systems that don’t collapse the moment traffic spikes. In this guide, we’ll look at some of the top UK companies leading that shift, and what makes them the go-to partners for businesses that want to move to the cloud without losing sleep.
1. A-Listware
At A-Listware, we work as a team of developers and consultants who spend most of our time building and supporting custom software solutions. For our UK clients, that often means helping them take on cloud projects where old systems need to meet new technology. We’re not big on pushing one-size-fits-all answers. Instead, we focus on figuring out how cloud adoption can slot into existing setups without causing chaos for the people using them every day.
We also stick around once the initial project is done. Some clients need ongoing support with managing cloud infrastructure, others want us to keep improving applications so they’re easier to run in modern environments. Our approach is pretty straightforward: make sure the technology works for the business rather than the other way around. That’s something our UK partnerships have shown us time and again, the best results come from keeping things practical and aligned with how teams actually work.
Key Highlights:
- Software development and consulting with cloud expertise
- Strong focus on supporting UK clients with digital projects
- Helps bridge the gap between legacy systems and modern platforms
- Provides both project-based and long-term support
- Practical approach that prioritises usability over complexity
Services:
- Cloud adoption and migration
- Custom software development
- Application modernisation
- Systems integration
- Ongoing infrastructure and application support
- Team extension and co-delivery for UK projects
Contact Info:
- Веб-сайт: a-listware.com
- Електронна пошта: info@a-listware.com
- Фейсбук: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
- Address: St. Leonards-On-Sea, TN37 7TA, UK
- Phone Number: +44 (0)142 439 01 40
2. CGI
CGI is a long-standing IT and consulting company with a presence in the UK. They handle a wide range of technology projects, and cloud adoption is one of the areas they spend a lot of time on. Their work usually means helping organisations move older systems into cloud environments without breaking the workflows people rely on every day. They tend to focus on making transitions smoother rather than forcing companies into a single approach.
On top of migration, they also step in to support companies once the move is done. That can cover ongoing system management, keeping security in check, and making sure everything scales properly as demand changes. It’s not about reinventing the wheel, but about setting up frameworks that work across industries and continue to hold up as technology evolves.
Key Highlights:
- Long-established IT and consulting provider
- Supports cloud adoption alongside broader IT services
- Handles both migration and post-migration support
- Focus on practical, industry-wide solutions
- Presence across the UK with global backing
Services:
- Cloud migration planning and execution
- IT consulting and advisory
- Managed cloud and infrastructure services
- Cybersecurity and compliance support
- Application modernisation and integration
- Ongoing operations and maintenance
Contact Info:
- Website: www.cgi.com
- Phone: +44 (0)20 7637 9111
- Address: The Kelvin, Suite 202 17-25 College Square East Belfast BT1 6DE UK
- LinkedIn: www.linkedin.com/company/cgi
- Twitter: x.com/CGI_UKNEWS
- Instagram: www.instagram.com/cgi_uk
- Facebook: www.facebook.com/CGI.UK
3. Claranet
Claranet is a UK-based technology company that deals a lot with cloud adoption and managed services. They often step in when businesses want to move away from running everything on their own servers but still need someone to keep the day-to-day running smoothly. Their work usually involves setting up cloud platforms, migrating existing systems, and making sure applications keep working while the shift happens.
Beyond the move itself, Claranet also looks after the ongoing management side. That means helping teams monitor their systems, keeping security under control, and handling updates or scaling when demand goes up. They work across different industries, so the solutions tend to be flexible enough to fit into whatever setup a business already has without forcing a full rebuild.
Key Highlights:
- UK-based company with a focus on cloud and IT services
- Handles migrations along with long-term management
- Works with existing business setups rather than replacing everything
- Covers both technical and operational support
- Experience across multiple industries
Services:
- Cloud migration and hosting
- Managed IT and infrastructure services
- Cybersecurity support
- Network and connectivity solutions
- Application management and modernisation
- Ongoing monitoring and support
Contact Info:
- Website: www.claranet.com
- Phone: 0330 390 0507
- Address: 6th Floor, 110 High Holborn, London, WC1V 6JS UK
- LinkedIn: www.linkedin.com/company/claranet
- Twitter: x.com/Claranet
4. Node4
Node4 is a UK company that focuses on helping businesses modernise their IT without making the process overly complicated. A lot of their work revolves around cloud adoption, where they guide organisations through the move from in-house servers to more flexible setups. They’re not about ripping everything out and starting from scratch but more about finding ways to fit cloud solutions around what’s already there so things keep running as usual.
They also stay involved once the migration is done, handling day-to-day operations, infrastructure management, and making sure security and performance don’t slip. Their role often ends up being part consultant, part long-term partner, giving businesses someone to lean on when they don’t want to keep everything in-house.
Key Highlights:
- UK-based company with a focus on cloud and IT infrastructure
- Helps businesses move existing systems into the cloud
- Stays involved with ongoing management and support
- Works with existing setups rather than replacing them completely
- Covers both the technical and operational sides of IT
Services:
- Cloud migration and hosting
- Managed IT services
- Infrastructure and data centre solutions
- Cybersecurity support
- Network and connectivity services
- Ongoing monitoring and maintenance
Contact Info:
- Website: node4.co.uk
- Email: info@node4.co.uk
- Phone: 0345 123 2222
- Address: 10 Bloomsbury Way,Holborn, London, WC1A 2SL UK
- LinkedIn: www.linkedin.com/company/node4
- Twitter: x.com/node4ltd
- Instagram: www.instagram.com/node4ltd
5. AND Digital
AND Digital is a UK company that works with organisations trying to modernise how they build and use technology. Their role is often about making the shift to cloud smoother while also helping teams get better at working with digital tools. Instead of just focusing on the technical migration, they put time into helping people inside the business adapt so the changes actually stick.
They tend to step in when a company needs more than just a technical setup. That might be moving applications into the cloud, creating new digital services, or training internal teams so they can manage things themselves going forward. The idea is to balance the hands-on work with enough guidance so companies don’t end up dependent on outside help forever.
Key Highlights:
- UK-based company with a focus on cloud adoption and digital delivery
- Works with both technical migration and team training
- Supports businesses in adapting to new ways of working
- Involved in both short projects and long-term collaboration
- Practical approach aimed at reducing reliance on outside support
Services:
- Cloud migration and adoption support
- Digital product design and development
- IT and software consulting
- Team training and capability building
- Application modernisation
- Ongoing technical support
Contact Info:
- Website: www.and.digital
- Address: The Space Holborn, 235 High Holborn, London, WC1V 7DN UK
- LinkedIn: www.linkedin.com/company/and_digital
- Twitter: x.com/AND_Digital
- Instagram: www.instagram.com/and.digital
- Facebook: www.facebook.com/anddigitaluk
6. Computacenter
Computacenter is a UK company that works with organisations to sort out large-scale IT and cloud needs. They usually get involved when businesses want to move big parts of their infrastructure into the cloud or need help running hybrid setups. Their role is often about making sure everything stays connected and secure while also handling the practical challenges that come with keeping older systems running alongside newer platforms.
They don’t just stop at migration. Computacenter also takes on the ongoing responsibility of managing infrastructure, supporting teams, and making sure systems can adapt as requirements shift. It’s a mix of technical work and long-term support, which helps businesses avoid being stuck with setups that can’t grow or adjust over time.
Key Highlights:
- UK-based company with a focus on IT and cloud services
- Handles large-scale migrations and hybrid environments
- Provides both technical delivery and long-term support
- Works across multiple industries and setups
- Balances modernisation with keeping older systems functional
Services:
- Cloud migration and management
- Hybrid IT solutions
- Infrastructure support and optimisation
- Cybersecurity services
- Network and connectivity solutions
- Ongoing operations and maintenance
Contact Info:
- Website: www.computacenter.com
- Email: Tell.Us@computacenter.com
- Phone: +44 (0) 20 7620 2222
- Address: 100 Blackfriars Road London, SE1 8HL UK
- LinkedIn: www.linkedin.com/company/computacenter
- Twitter: x.com/Computacenter
7. Version 1
Version 1 is a technology and consulting company that operates in the UK and works closely with organisations that want to move their systems into the cloud. They’re usually involved when a business has outgrown its older setups and needs a structured way to modernise without breaking the tools people still depend on. Their focus is often on making migrations smoother and setting up frameworks that can handle day-to-day use without constant firefighting.
Alongside the technical side, they also provide support that stretches beyond the migration itself. That could mean helping with application upgrades, keeping an eye on security, or providing managed services so businesses don’t have to run everything internally. They combine consultancy with ongoing delivery, which often makes them a long-term partner rather than just a one-off project provider.
Key Highlights:
- UK presence with focus on cloud and IT consulting
- Supports both migrations and post-migration operations
- Works with application upgrades as part of cloud adoption
- Balances consultancy with practical delivery
- Involved in long-term partnerships, not just short projects
Services:
- Cloud migration and adoption
- IT and business consulting
- Application modernisation and support
- Managed IT and infrastructure services
- Cybersecurity and compliance support
- Ongoing operations and maintenance
Contact Info:
- Website: www.version1.com
- Email: info@version1.com
- Phone: +44 203 859 4790
- Address: Waterloo Court, Suites 6 & 7, First Floor, 10 Theed St, London SE1 8ST, United Kingdom
- LinkedIn: www.linkedin.com/company/version-1
- Twitter: x.com/version1
- Instagram: www.instagram.com/version1group
- Facebook: www.facebook.com/Version1Group
8. Slalom
Slalom is a consulting firm with a UK presence that often works with companies trying to get more out of cloud technology. Their projects usually sit at the intersection of business strategy and IT delivery, which means they don’t just focus on moving data and systems into the cloud but also think about how that shift affects the way teams actually work. It’s not uncommon for them to get involved when a business wants to combine cloud migration with bigger digital change projects.
They tend to take a collaborative approach, often working alongside internal teams rather than taking everything over. That can mean co-designing solutions, setting up cloud platforms, or helping modernise applications that need to fit into newer setups. The work isn’t just about a single move but about making sure companies have the right mix of tools and processes to keep going once the consultants have stepped back.
Key Highlights:
- Consulting firm with a UK presence
- Focuses on both business and technology outcomes
- Works closely with in-house teams during projects
- Handles cloud adoption alongside broader digital change
- Balances migration with long-term process improvements
Services:
- Cloud strategy and adoption support
- Business and technology consulting
- Application modernisation
- Data and analytics solutions
- Organisational change support
- Ongoing advisory and project delivery
Contact Info:
- Website: www.slalom.com
- Email: connect@slalom.com
- Address: 2 London Bridge London, SE1 9RA, UK
- LinkedIn: www.linkedin.com/company/slalom-consulting
- Twitter: x.com/slalom
- Facebook: www.facebook.com/slalom-consulting
- Instagram: www.instagram.com/slalomconsulting
9. GFT
GFT is a consulting and technology company with a footprint in the UK that spends a lot of time working on cloud projects. They usually come in when businesses are ready to modernise their IT setup, often in industries where reliability and compliance really matter. Their role is often about guiding organisations through complex migrations and making sure new cloud systems fit into existing operations without causing major disruption.
They also get involved in areas beyond the move itself, like building digital platforms, setting up data solutions, or making sure cybersecurity standards are met. The way they work tends to be hands-on with clients, looking at both the technical requirements and the business context so that what gets delivered isn’t just technically sound but also usable day-to-day.
Key Highlights:
- Consulting and technology company with UK presence
- Works on cloud adoption in industries with high compliance needs
- Focuses on both migration and ongoing digital solutions
- Balances technical delivery with business outcomes
- Collaborative approach with client teams
Services:
- Cloud migration and management
- Digital platform development
- Data and analytics solutions
- Application modernisation
- Cybersecurity and compliance support
- Ongoing consulting and IT services
Contact Info:
- Website: www.gft.com
- Email: info@gft.com
- Phone: +44 20 3372 9200
- Address: 6th floor, 7 Bishopsgate London. EC2N 3AR UK
- LinkedIn: www.linkedin.com/company/gft-technologies-uk
- Twitter: x.com/gft_tech
- Instagram: www.instagram.com/gft_tech
- Facebook: www.facebook.com/gfttechnologies
10. Infosys
Infosys is a global IT company that also has a strong presence in the UK. They usually come into play when organisations need help moving large, complex systems into the cloud or want support modernising applications that have been running for years. Their approach is often about breaking down big IT challenges into manageable steps so businesses can keep things running while still making progress on long-term changes.
They also provide ongoing support once the initial work is done, which can include managing infrastructure, monitoring performance, or strengthening cybersecurity measures. What makes them relevant in the UK market is their ability to work across different industries and adapt to the specific needs of each organisation, whether that’s banks, retailers, or public services trying to get more from their technology investments.
Key Highlights:
- Global IT services company with UK presence
- Helps businesses move and modernise large systems in the cloud
- Focus on balancing long-term transformation with day-to-day operations
- Provides ongoing infrastructure and application support
- Works across multiple industries with tailored approaches
Services:
- Cloud migration and adoption
- Application modernisation and management
- IT consulting and advisory
- Infrastructure and operations support
- Cybersecurity and compliance
- Data and analytics solutions
Contact Info:
- Website: www.infosys.com
- Phone: +44 20 7715 3300
- Address: 14th and 15th Floor, 10 Upper Bank Street Canary Wharf London E14 5NP UK
- LinkedIn: www.linkedin.com/company/infosys
- Twitter: x.com/Infosys
- Facebook: www.facebook.com/Infosys
11. Cognizant
Cognizant is a global technology and consulting company with a strong base in the UK. They often step in when businesses want to move beyond patching up old systems and actually shift to cloud-based platforms that can scale. Their work is usually about guiding organisations through migrations while keeping existing systems ticking over, so day-to-day operations don’t grind to a halt during the transition.
They also get involved after the migration, helping companies manage infrastructure, modernise applications, and tighten up security. A lot of their projects mix business process changes with IT delivery, so it’s not just about the technology but also how teams adapt to using it. That balance tends to make them a long-term partner rather than a one-off provider.
Key Highlights:
- Global technology firm with UK presence
- Works on both cloud adoption and wider IT consulting
- Focus on balancing migration with ongoing operations
- Helps modernise applications alongside infrastructure changes
- Supports organisations across multiple industries
Services:
- Cloud migration and management
- IT consulting and advisory
- Application modernisation
- Infrastructure and operations support
- Cybersecurity and compliance
- Data and analytics solutions
Contact Info:
- Website: www.cognizant.com
- Email: CWSUKI@cognizant.com
- Address: Office 280 Bishopsgate London EC2M 4AG England UK
- LinkedIn: www.linkedin.com/company/cognizant
- Twitter: x.com/cognizant
- Facebook: www.facebook.com/Cognizant
- Instagram: www.instagram.com/cognizant
12. PA Consulting
PA Consulting is a UK-based consulting firm that works with organisations looking to modernise how they use technology, including adopting cloud platforms. They tend to get involved when a business is at a crossroads, needing to balance day-to-day operations with longer-term digital change. Their work often combines strategy with delivery, so it’s not just about drawing up a plan but also helping put it into practice.
A lot of their projects go beyond the technical setup. They often look at how cloud adoption ties into wider business goals, whether that’s making services more efficient, supporting new ways of working, or helping organisations meet regulatory demands. The mix of advisory and hands-on support means they can stick around after the initial move and guide businesses through the ongoing changes that come with digital transformation.
Key Highlights:
- UK-based consultancy with a focus on business and technology
- Works on cloud adoption alongside broader strategy projects
- Involved in both planning and delivery
- Helps align IT changes with business goals
- Provides ongoing support beyond initial migration
Services:
- Cloud strategy and adoption support
- Business and technology consulting
- Application and system modernisation
- Data and analytics services
- Cybersecurity and compliance
- Ongoing project and change management
Contact Info:
- Website: www.paconsulting.com
- Phone: +44 28 9073 6779
- Address: 4th Floor Printworks 35-39 Queen Street Belfast, BT1 6EA Northern Ireland UK
- LinkedIn: www.linkedin.com/company/pa-consulting
- Twitter: x.com/PA_Consulting
13. Fujitsu
Fujitsu is a long-standing technology company with a strong presence in the UK, and a lot of their work today revolves around cloud adoption and IT services. They tend to work with large organisations that need to shift critical systems into modern environments without losing reliability. Their role is often about keeping legacy systems stable while helping businesses build new cloud-based setups that can carry them forward.
They also stay on after the migration, handling day-to-day operations like infrastructure management, cybersecurity, and application support. Because they work across industries such as government, healthcare, and finance, their projects usually mix technical delivery with compliance and security needs. In practice, that means making sure cloud adoption doesn’t just work in theory but also fits into the rules and requirements of each sector.
Key Highlights:
- Established technology company with UK presence
- Focus on large-scale cloud and IT projects
- Balances legacy system support with cloud adoption
- Provides long-term operational and compliance support
- Works across industries including public sector and finance
Services:
- Cloud migration and hosting
- Managed IT and infrastructure services
- Cybersecurity and compliance
- Application support and modernisation
- Data and analytics solutions
- Ongoing operations and maintenance
Contact Info:
- Website: global.fujitsu
- Phone: +44 (0) 1235 797770
- Address: Lovelace Road, Bracknell RG12 8SN United Kingdom
- LinkedIn: www.linkedin.com/company/fujitsu
- Facebook: www.facebook.com/FujitsuICT
- Twitter: x.com/Fujitsu_Global
14. Kainos
Kainos is a UK-based technology company that spends a lot of time helping organisations move their systems into the cloud and modernise how they deliver digital services. They’re often called in by public sector bodies or enterprises that need to make big changes but can’t afford downtime. Their work usually involves reworking old systems so they fit into cloud environments, while also building new platforms that are easier to manage and scale.
They don’t just drop in for the migration and leave. Kainos often stays involved with ongoing support, whether that’s maintaining applications, keeping infrastructure secure, or helping teams adapt to new tools. Because they’ve worked heavily with government and healthcare, they tend to be very focused on compliance and making sure the tech lines up with regulations as much as with business needs.
Key Highlights:
- UK-based company with strong public sector and enterprise focus
- Specialises in moving legacy systems into the cloud
- Builds new digital platforms alongside migrations
- Provides ongoing support and infrastructure management
- Experienced in compliance-heavy industries like healthcare and government
Services:
- Cloud migration and hosting
- Digital platform development
- Application modernisation and support
- Cybersecurity and compliance services
- Data and analytics solutions
- Ongoing managed IT services
Contact Info:
- Website: www.kainos.com
- Phone: +44 28 9057 1100
- Address: 2nd Floor, 21 Farringdon Road, Clerkenwell, London, EC1M 3HA, United Kingdom
- LinkedIn: www.linkedin.com/company/kainos
- Twitter: x.com/KainosSoftware
- Facebook: www.facebook.com/KainosSoftware
Wrapping It Up
Cloud adoption in the UK has turned into less of a “nice to have” and more of a practical step businesses can’t really ignore anymore. The companies we’ve looked at all tackle the same challenge in different ways; some lean heavily into consulting, others handle the nuts-and-bolts delivery, and a few stick around as long-term partners keeping the lights on once the big move is done.
What’s clear is that there isn’t one single path that fits everyone. A small organisation might only need a straightforward migration, while a large enterprise could be dealing with years of legacy systems and strict compliance rules. The advantage of the UK market is that you’ll find a mix of providers from global firms with big teams to more focused local players, each bringing their own way of getting the job done. If you’re considering moving more of your business into the cloud, starting with a manageable project and seeing how the partnership works out is often the smartest way forward. It gives you room to learn, adjust, and build confidence before taking on the bigger steps.
