In 2026 there are more free cloud migration tools than ever — but each has significant limitations. This guide compares the major options so you can choose the right one for your migration.
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AWS Application Discovery Service: discovers on-premises servers via agent or agentless. Free. Outputs to AWS Migration Hub. Limitation: AWS-only recommendations, requires agent. AWS Migration Evaluator: TCO analysis for on-prem to AWS. Free but manual data collection. AWS MGN: actual migration execution tool (not assessment). Free.
Azure Migrate: discovery and assessment of on-premises VMs. Free. Recommends Azure VM sizes. Limitation: Azure-only, requires appliance, 30-day data collection. Azure TCO Calculator: simple web calculator, no real inventory analysis. Azure Advisor: for existing Azure workloads only.
Google Cloud Migrate: discover and migrate on-premises VMs to GCP. Free. GCP-only. StratoZone (Google acquired): more comprehensive discovery. GCP-focused. Google Cloud Cost Management: for existing GCP workloads. GCP-only.
Fundamental limitation of all native tools: they recommend their own cloud. TCOIQ is cloud-agnostic — compares AWS, Azure, GCP, OCI and Alibaba simultaneously. No agent installation. Results in 60 seconds. Free plan with executive summary. Pro at $5/month for full report.
Native tools: already decided on target cloud, want detailed sizing. TCOIQ: comparing clouds, want results without agents, need multi-cloud comparison for leadership, want to validate vendor recommendation with independent analysis.
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