Top 15 cloud migration companies in the UK: 2026 comparison guide

The United Kingdom is one of Europe's leading destinations for cloud migration outsourcing. International companies choose UK vendors for their engineering expertise, cloud partnerships with hyperscalers, and alignment with international data standards. According to Grand View Research, the UK cloud migration services market is projected to grow from $596.6M in 2024 to $2.4B by 2030 [1]. At the same time, the growing number of providers can make it difficult to identify a reliable partner with verified delivery experience, the right accreditations, and relevant industry expertise.

How can you choose a reliable migration vendor among the variety of cloud migration companies in the UK? Which criteria help distinguish providers with proven expertise? We researched the UK market and compiled a shortlist of 15 companies to help you make an informed choice.

Evaluation criteria for cloud migration firms in the UK

A partner with extensive cloud delivery experience is better equipped to manage migration complexities, address compliance requirements, and maintain a structured delivery approach. We shortlisted companies for this guide using criteria that reflect those capabilities. When evaluating vendors, pay attention to:

• Comprehensive migration service coverage. Look for companies that support the full migration lifecycle, from assessment and architecture design to implementation and post-migration operations. When one team manages all stages, critical context about the environment is less likely to be lost between phases.
• Cloud security and compliance services. A reliable partner should design and configure cloud environments that meet security and compliance standards from the start. They usually include GDPR, ISO 27001, and industry-specific frameworks such as HIPAA or PCI DSS.
• Relevant industry experience. A vendor that has worked in your industry already understands your compliance requirements, data constraints, and operational processes. This can reduce onboarding time and lower the risk of incorrect assumptions early in the project.
• Company size. Mid-to-large vendors with more than 250 professionals on board can assign specialists across architecture, cloud engineering, and security at once. This allows assessment, architecture, and migration workstreams to run concurrently, keeping each discipline properly staffed throughout the engagement.
• Official partnerships with at least one major cloud provider. AWS, Microsoft Azure, and Google Cloud partner programs require vendors to pass technical assessments and maintain certified engineers. These partnerships are publicly verifiable and provide independent validation of cloud expertise.
• Long operating history. Vendors with more than 10 years of experience have worked across different architectures, platforms, and delivery models. This background enables them to make better decisions about migration planning, timelines, cost optimization, and risk management.
• High rating on review platforms. B2B marketplaces, like Clutch, verify client rankings through independent interviews. A Clutch rating above 4.7 with at least 10 customer assessments provides reliable evidence of the vendor’s delivery quality.

Quick comparison of the leading cloud migration companies in the UK

Before exploring each company in detail, use the table below to compare the shortlisted vendors by team size, market experience, Clutch ratings, and partnerships with hyperscalers.

15 best cloud migration companies in the UK

1. N-iX

N-iX is a global cloud migration company founded in 2002, with over 2,400 professionals on board. Being an AWS Premier Tier Partner, Microsoft Solutions Partner, and Google Cloud Partner, the vendor offers a comprehensive set of professional migration services. They include cloud readiness assessment, architecture design, migration execution, cloud security integration, DevOps implementation, and post-migration infrastructure management. During post-migration support, a team of over 400 cloud experts helps optimize cloud performance, implement FinOps practices, validate data integrity, conduct continuous monitoring, address post-go-live issues, and more.

N-iX’s team can design and execute various migration strategies, from rehosting and replatforming to full cloud-native rearchitecture. The vendor is also experienced in configuring public, private, hybrid, and multicloud environments. As a Pragmatic AI Software Engineering company, N-iX can help businesses integrate AI, ML, and data analytics solutions across various cloud environments.

Due to the regulatory standards in the United Kingdom and worldwide, the company holds ISO 27001, ISO/IEC 27701, GDPR, HIPAA, and PCI DSS certifications. For UK organizations operating under the FCA or NHS frameworks, N-iX engineers help integrate these policies into cloud architecture from the start. The vendor has successfully delivered more than 200 cloud projects, including engagements for Fortune 500 enterprises.

2. Computools

This IT consulting company was founded in 2013 and delivers cloud services across AWS, Azure, and Google Cloud platforms. Their offering includes cloud application development, migration execution, cloud security with encryption and identity and access management services, infrastructure management, and ongoing support. Holding ISO 9001 and ISO/IEC 27001 certifications, the company is compliant with GDPR, HIPAA, and DORA. They offer cloud services for companies in retail, logistics, finance, healthcare, travel, and energy industries.

3. NashTech

Established in 2000, this software development company has delivery centers in the UK and Vietnam. They offer cloud migration services within a structured framework covering assessment, strategy, migration execution, and optimization. The company also provides a hybrid onshore/offshore delivery model. Partnering with AWS, Azure, and GCP, the vendor is one of the few cloud migration companies in the UK holding accreditations from all three hyperscalers.

4. Transparity

This IT consulting vendor is among the cloud migration firms in the UK that offer cloud services exclusively on Azure. Their engineers follow the Microsoft Cloud Adoption Framework and help companies migrate infrastructure, database, and application workloads in this ecosystem. They also provide access to Azure Accelerate funding for eligible projects. Their portfolio includes successful case studies within education, healthcare, government, manufacturing, retail, and telecom sectors.

5. Keyrus

This global digital intelligence consultancy was founded in 1996. Their cloud services include migrating data platforms and analytics workloads to AWS and Microsoft Azure. They also provide cloud architecture design, hybrid cloud solutions development, cloud-native modernization, and cost optimization services. The vendor has ISO 9001 certification and follows environmental, social, and governance (ESG) policies.

6. One Beyond

Operating since 1994, this vendor holds the Microsoft Solutions Partner status. Among the longest-established cloud migration companies in the United Kingdom, this one offers comprehensive cloud consulting, infrastructure evaluation, security assessment, and migration services. They help companies in the commercial and public sectors, including large enterprises, SMEs, government institutions, and non-profits.

7. Virtusa

With over 30 years of experience, this software engineering company specializes in cloud migration, DevOps implementation, and FinOps services. They offer a comprehensive set of cloud assessments, including evaluations of business impact, application dependencies, compliance requirements, security posture, and the technical inventory. Partnering with three major hyperscalers, the vendor serves banking, finance, communications, healthcare, life sciences, manufacturing, media, retail, and logistics sectors.

8. Future Processing

This is one of the established cloud migration companies in the UK market for finance, insurance, and healthcare organizations. Founded in 2000, the vendor holds AWS and Microsoft partnership status, enabling it to deliver cloud services proficiently. Following the Cloud and Data Modernization Framework, they provide readiness assessment, migration execution, cost optimization, and post-migration services. The company holds ISO 27001 and NIS2 certifications to follow cybersecurity and data protection standards.

9. *instinctools

This cloud migration and consulting vendor holds partnerships with AWS, Azure, GCP, and OVHcloud. Delivered services include migration strategy design, infrastructure transition, application modernization, DevOps and CI/CD pipeline implementation, and cloud cost optimization. The company has industry experience across healthcare, fintech, manufacturing, logistics, ecommerce, automotive, entertainment, education, and insurance.

10. TatvaSoft

This software development company was founded in 2001. Their cloud and DevOps services include cloud strategy design, migration execution, cloud-native application development, infrastructure automation, and CI/CD pipeline implementation. They are also compliant with NIST, PCI DSS, and HIPAA frameworks. As one of the top cloud migration companies in the UK, the vendor has strong industry expertise in fintech and insurance, retail and ecommerce, energy and utilities, media and entertainment, and other sectors.

11. Altkom

Founded in 2000, this technology company is a trusted cloud partner to finance and insurance clients. They hold AWS and Microsoft Partner statuses, as well as ISO 27001 certification. Their cloud services include migration strategy and execution, architecture design, cloud-native development, and FinOps cost optimization. Cloud engineers here are also experienced in building complex hybrid cloud environments with integrated security practices, including IAM, encryption, and VPNs.

12. Riseup Labs

Since 2010, this software engineering company has delivered to clients in over 20 countries and has gained a Microsoft Partner status. The vendor’s cloud services include infrastructure strategy design, database management, application containerization, DevOps implementation, disaster recovery and backup, and modernization services. They also help build reliable infrastructures across private, public, and hybrid clouds.

13. Dotsquares

Headquartered in Brighton, this IT consulting vendor operates across the UK, USA, Australia, UAE, and India. Partnering with AWS and Azure, they offer cloud consulting, cloud strategy design, migration, cloud application development, and managed services. Among cloud migration service providers in the UK, the company holds ISO 27001, CMMI Level 3, and Cyber Essentials Plus certifications.

14. SoftProdigy

The company was founded in 2006 and is among the leading cloud migration companies in the UK. Being ISO 27001-certified, the vendor offers a comprehensive set of cloud services. They include application, database, and infrastructure migration, performance optimization, disaster recovery, and security services. They also comply with GDPR, HIPAA, and PCI DSS data protection regulations.

15. unosquare

This nearshore engineering firm was founded in 2009. Their cloud services include cloud-native architecture design, migration from legacy systems, Infrastructure as Code, CI/CD implementation, and cloud cost optimization. Their five-step migration framework runs from maturity assessment through automation, execution, and continuous support. Their portfolio includes case studies across healthcare, finance, media, energy, and non-profit sectors.

Why choose N-iX among the leading cloud migration companies in the UK?

N-iX has been delivering a range of cloud services and solutions since 2002. As one of the cloud migration companies in the United Kingdom, it serves global organizations that need both engineering scale and regulatory alignment. Here are some reasons to consider N-iX for your cloud migration:

• N-iX has over 2,400 professionals on board, including more than 400 cloud experts who support migrations of varying sizes and complexity.
• The company is a certified AWS Premier Tier Partner, Microsoft Solutions Partner, and Google Cloud Partner.
• N-iX operates in accordance with the GDPR and HIPAA frameworks and holds ISO 27001, ISO/IEC 27701, CyberGRX, and PCI DSS certifications.
• The company has delivered over 200 cloud projects, including engagements with Fortune 500 organizations and large international enterprises.
• Industry analysts and technology rankings have recognized N-iX in reports and listings such as Forrester’s Modern Application Development services providers, the IAOP Global Outsourcing 100, and CRN’s Solution Provider 500.

References

1. Grand View Research — UK Cloud Migration Services Market Size and Outlook, January 2026