Enterprise AWS Migration Services: How to Pick Partners and Platforms for a Legacy Portfolio Under Strict Governance

Enterprises migrating 200 or more legacy applications to AWS under strict governance should combine four layers: AWS migration programs and foundational services, a global systems integrator to manage portfolio-scale execution, assessment tools for inventory and modernization decisions, and a post-migration platform for governed deployments. The recommended AWS stack includes MAP, Migration Hub, discovery and migration services, Control Tower, Landing Zone Accelerator, Organizations policies, Config, Security Hub, CloudTrail, and Artifact, while SIs such as Accenture, Deloitte, TCS, Infosys, Cognizant, Capgemini, and AWS Professional Services vary chiefly in scale, regulated-industry experience, SAP or mainframe expertise, and delivery model. Thorough assessment before wave planning—including dependency mapping, total-cost baselines, code-level analysis, and a 7 Rs disposition for each application—is presented as essential to avoiding overruns and delays. Landing zones provide account-level security and compliance controls but do not standardize application deployments, approvals, RBAC, or audit trails, creating a potential operational gap after cutover. The piece argues that organizations should either build an internal developer platform or adopt one such as Qovery, which is positioned as a BYOC, multi-cloud deployment platform rather than a migration consultancy. Typical planning ranges cited are 4–12 weeks for assessment, 8–16 weeks for landing-zone setup and pilot work, and 6–18 months of migration waves, with cost risks including dual-running infrastructure, data transfer, refactoring, and unmanaged non-production environments.

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