Cloud Migration Vendors and Service Providers in the US

The US cloud migration market encompasses a wide range of vendors, managed service providers, and systems integrators that help organizations move workloads, data, and applications from on-premises infrastructure to public, private, or hybrid cloud environments. This page covers how vendor categories are structured, how the engagement model works, which scenarios drive vendor selection, and where organizations should draw the line between vendor types. Understanding the landscape is foundational to any cloud migration partner selection process.

Definition and scope

Cloud migration vendors are commercial entities that provide technology, professional services, or managed operations to transfer IT assets from one environment to another — typically from on-premises data centers to cloud platforms operated by hyperscalers such as Amazon Web Services, Microsoft Azure, or Google Cloud. The US market segments these providers into four distinct categories:

1. Hyperscaler native programs — AWS, Azure, and Google Cloud each maintain their own migration competency programs. AWS Partner Network (APN) tiers vendors as Select, Advanced, or Premier. Microsoft's Cloud Partner Program uses Solution Partner designations. Google Cloud Partner Advantage uses tiered specializations.
2. Systems integrators (SIs) — Large consulting firms (Accenture, Deloitte, IBM Global Services) offer end-to-end migration design, execution, and governance. These typically engage at the enterprise tier.
3. Managed service providers (MSPs) — Firms that take ongoing operational responsibility post-migration, often holding MSP designations validated by hyperscaler partner programs.
4. Independent software vendors (ISVs) with migration tooling — Companies such as Carbonite, Zerto, and CloudEndure (now part of AWS) produce purpose-built migration automation software.

The National Institute of Standards and Technology (NIST) defines cloud service models — IaaS, PaaS, SaaS — in NIST SP 800-145, which provides the baseline taxonomy vendors use when classifying their service offerings and target environments.

Scope, for procurement purposes, extends from initial cloud readiness assessment through application portfolio rationalization, migration execution, and post-migration optimization. Organizations evaluating the technology services listings on this network will find vendors mapped to these functional phases.

How it works

A structured vendor engagement follows a phased delivery model that mirrors the migration lifecycle:

1. Discovery and assessment — Vendors deploy agent-based or agentless tooling to inventory on-premises workloads. AWS Migration Hub, Azure Migrate, and Google Cloud's Rapid Assessment & Migration Program (RAMP) each provide native discovery tools that feed into vendor-managed dashboards.
2. Business case development — Vendors produce TCO (total cost of ownership) analyses. The AWS Pricing Calculator and Azure TCO Calculator are publicly documented tools vendors use to substantiate cost projections. Detailed guidance on cost modeling is covered in cloud migration cost estimation.
3. Migration factory execution — High-volume migrations use a wave-based approach where workloads are grouped by dependency, complexity, and risk. A single migration wave may include 20–200 workloads depending on environment scale. Cloud migration wave planning documents this batching methodology.
4. Cutover and validation — Vendors coordinate network reconfiguration, DNS cutover, and post-migration testing before decommissioning source environments. Downtime minimization strategies during this phase are addressed in cloud migration downtime minimization.
5. Hyperscaler billing integration — MSPs frequently resell hyperscaler capacity under reservation models (AWS Savings Plans, Azure Reserved VM Instances) as part of their managed cost optimization layer.

The Federal Risk and Authorization Management Program (FedRAMP), administered by the General Services Administration (GSA), imposes additional vendor qualification requirements for migrations involving federal government data. Only vendors operating on FedRAMP-authorized platforms may support those engagements. Specific requirements are documented at fedramp.gov.

Common scenarios

Lift-and-shift (rehost) is the highest-volume engagement type. Vendors rehost virtual machines with minimal modification, prioritizing speed over cloud optimization. A lift-and-shift migration typically takes 3–6 months for mid-market environments of 50–500 servers, depending on data volume and network bandwidth.

Replatforming and refactoring engagements require deeper application expertise. Vendors modify application layers to leverage managed database services, containerized runtimes, or serverless functions without full redevelopment. The tradeoffs between these approaches are detailed in replatforming vs. refactoring.

Regulated industry migrations represent a specialized scenario. Healthcare organizations subject to HIPAA must engage vendors capable of executing Business Associate Agreements (BAAs) and must select cloud environments with documented HIPAA eligibility — a requirement covered in HIPAA-compliant cloud migration. Payment card environments subject to PCI DSS require vendors with documented scoping and segmentation experience, as covered in PCI DSS cloud migration.

Legacy system migrations involving mainframe or COBOL-based architectures require vendors with specific modernization capabilities, distinct from commodity rehost vendors. This scenario is addressed in legacy system cloud migration.

Decision boundaries

Selecting between vendor categories depends on three primary factors: organizational scale, compliance exposure, and internal capability.

SI vs. MSP: Systems integrators are appropriate when the organization requires design authority, governance architecture, and program management for a one-time migration event. MSPs are appropriate when the organization intends to outsource ongoing cloud operations post-migration. The two models are not mutually exclusive — an SI may execute migration while an MSP assumes operational handoff.

Native tooling vs. third-party tooling: Hyperscaler-native migration tools (AWS Migration Hub, Azure Migrate) carry no additional licensing cost and integrate directly with billing and governance consoles. Third-party ISV tools such as Zerto or Carbonite offer hyperscaler-agnostic portability, which matters in multi-cloud migration strategy contexts where a single-hyperscaler tool creates lock-in risk.

Compliance-qualified vs. general-purpose vendors: For FedRAMP, HIPAA, or CJIS-covered environments, vendor selection is constrained by documented authorization status — not by commercial preference alone. NIST SP 800-53, Rev. 5 (csrc.nist.gov) defines the control baselines against which compliant vendors must demonstrate capability.

Organizations performing cloud migration risk management assessments should formalize vendor qualification against these boundaries before issuing RFPs or entering vendor negotiations.

References

• NIST SP 800-145: The NIST Definition of Cloud Computing
• NIST SP 800-53, Rev. 5: Security and Privacy Controls for Information Systems
• FedRAMP — Federal Risk and Authorization Management Program (GSA)
• AWS Partner Network (APN) Program
• Microsoft Cloud Partner Program
• Google Cloud Partner Advantage Program