Top 5 Cloud Migration Companies in 2026

How to evaluate cloud migration companies

Before shortlisting vendors, it helps to have a consistent framework. Most migrations that go wrong don’t fail on technology – they fail because the evaluation focused on price and timeline rather than fit. Four criteria matter most:

• Infrastructure assessment depth – does the partner audit what you actually have before recommending what to do? Partners that jump straight to a proposal without a discovery phase are a red flag.
• Migration strategy breadth – can they execute across the full 6 Rs (Rehost, Replatform, Refactor, Repurchase, Retire, Retain), or do they default to lift-and-shift regardless of your situation?
• Data protection during migration – how do they handle downtime windows, rollback procedures, and data integrity checks? Get specifics, not assurances.
• Post-migration FinOps – cloud costs often spike in the first 6–12 months after go-live. A good partner has a defined optimization practice, not just a handover document.

Beyond these four, look at verifiable client track records in your industry, cloud platform certifications relevant to your target environment, and whether the company’s delivery model supports ongoing evolution or wraps up at go-live.

Top 5 cloud migration companies in 2026

1. Boldare

Region: EU (Poland, with global delivery)

Clutch: clutch.co/profile/boldare

Website: boldare.com

We approach cloud migration as a product problem, not an infrastructure task. With 20+ years of experience in full-cycle digital product development and an AWS certification backing our technical credentials, we work primarily with enterprises and scaleups in energy, mobility, manufacturing, and software – clients like sonnen, Vattenfall, BlaBlaCar, and Bosch.

What distinguishes us from most migration vendors is our AI-native delivery model. AI is not a layer added on top of our process – it operates beneath it, from infrastructure assessment through post-migration optimization. In practice, this means faster discovery cycles, automated testing during cutover, and more precise cost modeling before a single workload moves.

Our migration work is rarely isolated from the broader product. We typically engage when a company needs to migrate and modernize simultaneously – when the legacy system being moved also needs to be re-architected, the team needs to be upskilled, or the migration is the first step in a longer cloud-native transformation. That scope requires a different kind of partner than a pure infrastructure vendor.

Key services: Cloud & DevOps, full-cycle product development, AI integration, legacy modernization, QA and testing

Typical clients: Enterprises and scaleups in energy, mobility, manufacturing, software

Best for: Organizations that need migration embedded in a broader product transformation – not just a lift-and-shift, but a cloud environment designed to scale and evolve

Why we ranked first: Our AWS certification confirms technical depth. Our AI-native delivery model and product-first methodology mean we can handle not just the migration itself, but everything that needs to happen after go-live.

2. Gart Solutions

Region: Eastern Europe (Ukraine)

Clutch: clutch.co/profile/gart-solutions

Gart Solutions specializes in Google Cloud Platform migrations, with a process built around minimizing service disruption during workload transfers. Their workflow covers cloud infrastructure design, readiness reviews, ongoing environment management, and post-migration cost optimization.

They work primarily with small and mid-sized organizations that need a structured, phased migration approach – particularly companies moving data-heavy workloads to GCP for the first time. Their strength is operational: clear migration sequencing, defined rollback procedures, and a focus on keeping environments running during the transition.

Best for: SMB and mid-market organizations migrating to GCP that need a cost-conscious, well-sequenced migration partner without the overhead of a large consultancy

3. Leobit

Region: Lviv, Ukraine / USA

Clutch: clutch.co/profile/leobit

Leobit brings deep expertise in .NET-heavy legacy environments and cloud transformation across AWS and Azure. Their migration work focuses specifically on moving organizations away from aging Microsoft technology stacks – WCF, WinForms, and on-premise .NET applications – toward current, maintainable cloud-native architectures.

They serve a technically diverse client base: sports technology, CNC manufacturing, supply chain, and real estate. The common thread is legacy complexity. Leobit’s migration approach prioritizes architectural clarity – understanding what the system actually does before deciding how to move it – which reduces the risk of replicating technical debt in the new environment.

Best for: Mid-market companies running .NET-heavy legacy systems that need a migration partner with proven experience in that specific stack on AWS or Azure

1. Devox Software

Region: Kyiv, Ukraine / Miami, USA

Clutch: clutch.co/profile/devox-software

Devox Software takes a refactor-before-migrate approach. Rather than moving technical debt directly to the cloud, they begin with technical audits and code refactoring – addressing the structural problems in the existing system before the migration begins. This reduces the risk of carrying legacy problems into the new environment, though it extends the overall project timeline.

Their client base sits primarily in fintech, fleet management, and SaaS. They offer full-cycle development services alongside migration work, which means they can handle both the re-architecture and the cutover within a single engagement.

Best for: SMB and mid-market teams that want to reduce technical debt before migrating, and are willing to invest in a pre-migration audit and refactor phase to get a cleaner result

5. Intellias

Region: Ukraine / EU / USA (global delivery)

Website: intellias.com

Intellias is a large-scale engineering company with 4,000+ engineers and a strong track record in cloud transformation for enterprise clients. Their cloud migration work spans AWS, Azure, and GCP, with particular depth in automotive, fintech, and telecom – industries where compliance, data residency, and uptime requirements drive migration complexity.

They operate at a different scale than most companies on this list. Intellias is suited for enterprises that need large dedicated teams, multi-region deployments, and the capacity to run parallel migration workstreams across complex system landscapes. The trade-off is the engagement model: larger contracts, longer ramp-up, and less flexibility for organizations that need to move quickly with a small team.

Best for: Large enterprises in automotive, fintech, or telecom that require dedicated engineering teams at scale for complex, multi-cloud or multi-region migration programs

Decision matrix: which partner fits your situation

The table below maps each company to the scenario where they’re the strongest fit. Use it as a starting point – not a final answer. The right choice depends on your system complexity, timeline, budget, and whether migration is a standalone project or part of a broader transformation.

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FAQ

What is the difference between cloud migration and legacy modernization?

Cloud migration moves existing workloads from on-premise infrastructure to cloud platforms (AWS, Azure, GCP). Legacy modernization addresses the architecture and code of those systems – refactoring monoliths, replacing outdated frameworks, or re-designing how data flows. The two are related but distinct. Some migrations are pure lift-and-shift with no modernization. Others use migration as the trigger for a deeper re-architecture. The right approach depends on how much of your technical debt is structural versus environmental.

How long does an enterprise cloud migration typically take?

For a mid-sized enterprise with a complex application portfolio, a well-structured migration runs between 6 and 18 months. Simple rehosting projects can complete faster. Full re-architecting alongside migration – Refactor in the 6 Rs model – can extend beyond 18 months. The biggest variables are the quality of existing documentation, the number of downstream dependencies, and how much the business can tolerate disruption during the transition window.

What should I ask a cloud migration partner before signing?

Five questions worth asking: How do you assess our existing infrastructure before proposing a migration strategy? Which of the 6 Rs do you apply most often, and why? How do you handle rollback if something breaks mid-migration? What does your FinOps practice look like post go-live? Can you show us a migration you did for a company with a similar architecture and scale?

Is AWS certification a meaningful differentiator?

AWS certification confirms that a partner has validated technical knowledge of AWS services and migration patterns. It matters for AWS-specific migrations – particularly where you need to use AWS Migration Hub, DMS, or Mainframe Modernization. It is not a guarantee of delivery quality, but it is a reasonable filter. For Azure or GCP migrations, look for the equivalent certifications from those providers.

When does it make sense to refactor before migrating?

When your application has significant structural technical debt – tightly coupled services, undocumented business logic, or a codebase that no one on the current team fully understands. Migrating a broken architecture to the cloud gives you a cloud-hosted broken architecture. The cost of fixing it post-migration is typically higher than addressing it first. The counter-argument is speed: if the system is functional and the main goal is infrastructure cost reduction, rehosting and optimizing later can be the pragmatic choice.

Choosing the right cloud migration company

The companies on this list are good at different things. The decision shouldn’t be about who has the most impressive client logo – it should be about which partner’s model matches the problem you’re actually trying to solve.

If migration is the starting point for a broader product transformation, you need a partner that can think beyond infrastructure. If you’re running a .NET-heavy legacy environment, you need someone who has done that migration dozens of times. If you need large dedicated teams across multiple regions, you need engineering capacity at scale.

Getting that match right is more important than which name ends up at the top of a ranking. If you’re currently mapping out your migration approach and want to pressure-test your assumptions before committing to a vendor, a short architecture assessment is usually the most useful next step.