Azure Database Migration Service is a managed Azure service that orchestrates database schema and data migrations into Azure targets, offering online (continuous sync/CDC-like) and offline migration modes and integrating with assessment tooling to identify compatibility issues prior to cutover.
Published Oct 14, 2026
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| Aspect | Azure Database Migration Service | AWS Database Migration Service (AWS DMS) | Google Cloud Database Migration Service |
|---|---|---|---|
| Starting Price | Region- and offer-dependent pricing surfaced via the vendor pricing calculator; no single global rate card commonly presented | Published pricing with publicly documented usage-based replication instance charges and related cost dimensions | Pricing ties migration work to target instance behavior and network charges; model varies by setup |
| Best For | Migrations into Azure where the scenario matches Microsoft’s supported matrix, particularly SQL Server to Azure SQL targets with integrated assessment tooling | Migrations into AWS targets (RDS/Aurora), including ongoing replication use cases; preferred when a provider-native, usage-based pricing model is desired | Migrations into Cloud SQL/AlloyDB where GCP-native tooling and integration are desired |
| Key Strength | Integration with Azure platform and Microsoft assessment/remediation workflows | Clearer publicly documented pricing model and strong support for continuous replication workloads | Integration with Cloud SQL/AlloyDB and explicit ties between migration and target instance costs |
| Key Weakness | Scenario limitations for some source/target combinations; community reports of lower throughput or constrained scaling in some cases; pricing visibility requires calculator input | Requires careful instance sizing and operational planning; ongoing usage-based costs may apply during long migrations | Migration cost structure can be tied to target instance behavior and network, which may be less intuitive in some cases |