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- As of June 17, 2026, Cloudiway leads G2's cloud migration category at approximately 4.9 stars — the highest user-rated score — ahead of MigrationWiz and ShareGate, both rated 4.7 stars with 275 and 139 reviews respectively.
- The global cloud migration services market reached $31.5 billion in 2026, per MarketsandMarkets, growing at a 22.4% CAGR — yet 55% of organizations still report their migrations failed to meet expectations.
- 38% of projects exceed their original budget by an average of 23%, and organizations that skip formal readiness assessments are 2.4x more likely to end up in the failure column.
- AI workload migration — planning for GPU capacity, inference cost patterns, and AI-specific data flows — has become a new architectural layer that most legacy migration tools do not cover without add-ons.
What's on the Table
What if the reason so many cloud migrations fail has less to do with the cloud itself and more to do with which tool a team chose to get there? According to Google News coverage published June 17, 2026, G2's latest cloud migration software rankings surface exactly this question: user reviews aggregated from hundreds of real deployments, not vendor-commissioned benchmarks. The category now spans pure-play migration specialists, platform-specific utilities, and the free-tier tools that hyperscalers bundle in to reduce switching friction into their own ecosystems.
As of June 17, 2026, according to MarketsandMarkets, the global cloud migration services market stands at $31.5 billion, on a trajectory to reach $143.7 billion by 2035 at a 22.4% CAGR. That growth curve masks a stubborn operational reality: on-time, on-budget completion rates improved from 54% in 2022 to 65% in 2026 — a real gain — but 38% of projects still exceed their budget, and 31% miss their planned timelines. The tools a team selects shape which side of that split they land on.
The Job You're Actually Hiring These Tools to Do
Cloud migration tools are not a single category — they are hired for fundamentally different jobs, and the mismatch between job and tool is where most cost overruns originate. The market currently divides across three distinct hiring scenarios.
Microsoft 365 and tenant-to-tenant consolidation. This is where MigrationWiz and Cloudiway compete most directly. Organizations integrating after acquisitions, relocating email and OneDrive data between tenants, or shifting from Google Workspace to M365 hire these tools for their workflow automation depth and audit trail capabilities. Cloudiway's ~4.9-star G2 rating as of June 17, 2026 is earned primarily in this segment. MigrationWiz, at 4.7 stars from 275 reviewers, is the workhorse option favored by managed service providers running high-volume, repeatable migrations where edge cases surface regularly.
SharePoint and Teams governance migrations. ShareGate fills a narrower but high-stakes niche: organizations with layered SharePoint permission structures, Teams channels, and metadata dependencies that generic tools routinely mangle. Its 4.7-star score from 139 G2 reviewers reflects a smaller, more specific audience — one where getting permissions wrong triggers a compliance failure, not just a broken hyperlink. It is a productivity software pick for teams where governance is not optional.
Infrastructure and storage lift to a single hyperscaler. This is where native tools enter: AWS DataSync, Azure Storage Mover, and Google Storage Transfer Service. All three offer free migration periods to reduce vendor switching costs. As of June 17, 2026, per Synergy Research Group, AWS holds 30% global cloud infrastructure share, Azure 25%, and Google Cloud 13%. Each has built migration tooling optimized for onboarding workloads into its own environment. The limit is clear: once a team needs to move data between clouds, native tools stop cooperating.
Side-by-Side: Where the G2 Ratings Actually Diverge
Chart: G2 user-review star ratings for the three highest-rated cloud migration tools as of June 17, 2026. Scale begins at 4.5 to surface meaningful differences. Source: G2.
The 0.2-star gap between Cloudiway and the other two tools is narrower than it appears. Cloudiway's score comes from a more selective reviewer pool, which naturally skews higher. MigrationWiz's 275 reviews represent a substantially broader deployment base, including MSPs running bulk migrations where edge cases surface far more often. That volume is arguably a more stress-tested signal than a higher score drawn from a smaller audience. Industry analysts note that review count and rating together tell the story — a tool with 275 reviews at 4.7 has been put through more real-world conditions than one with fewer.
The native hyperscaler tools (AWS DataSync, Azure Storage Mover, Google Storage Transfer Service) do not appear prominently in G2's rankings primarily because infrastructure engineers who provision these through cloud consoles rarely leave peer reviews. That absence does not signal a weakness — it reflects a different buyer journey. As of June 17, 2026, per Flexera, 87% of enterprises run multi-cloud environments. That statistic is the third-party tool market's strongest argument: once data needs to move between AWS and Azure, or between Google Workspace and M365, native tools offer little practical help.
Team collaboration platform migrations — particularly from legacy on-premises SharePoint to Microsoft Teams in Microsoft 365 — represent one of the fastest-growing migration workloads in 2026. This is where ShareGate's narrow specialization pays off relative to broader tools. As covered in smart-ai-agents.blogspot.com's analysis of Cohesity's Maestro MCP, enterprise data protection and migration governance are converging — tools that treat them as fully separate concerns are creating new risk exposure that shows up after the migration completes, not during it.
The Real Switching Cost Before You Sign
The demo is not the product. Every cloud migration tool demonstrates beautifully in a controlled environment with clean data, a single source tenant, and no legacy permissions structures. Production environments look nothing like that.
Three specific cost categories most procurement conversations skip entirely:
Readiness gaps compound tool limitations. Organizations that conduct formal readiness assessments before migrating achieve 2.4x higher success rates compared to those that skip them, per research current as of June 17, 2026. No migration tool substitutes for a dependency map built before the first workload moves. ShareGate offers pre-migration assessment modules; MigrationWiz and Cloudiway both provide pre-flight analysis features. The critical variable is whether a team actually runs them before signing the SOW (statement of work), not whether the feature exists in the product.
Multi-cloud overhead is recurring, not one-time. As of June 17, 2026, multi-cloud complexity adds an average of $1.4 million per year in management overhead for large enterprises, according to industry analysis. Selecting a tool optimized for a single hyperscaler's ecosystem can lock a team into a migration pattern that makes the next move — to a second cloud or a hybrid model — significantly more difficult and expensive. This is the team-size cliff: what works for a 50-person organization moving to a single cloud rarely scales cleanly to a 2,000-person enterprise running hybrid infrastructure.
Per-user and per-gigabyte pricing at scale. MigrationWiz and Cloudiway both price migrations per user or per gigabyte depending on migration type. At small scale, the licensing cost is negligible. At enterprise scale — 500 SharePoint sites, 10,000 mailboxes, and petabytes of OneDrive data — the per-item model can produce numbers the original budget estimate never accounted for. The data export reality: get the pricing table out before the contract, not after the kickoff meeting.
Which Fits Your Situation
Microsoft 365 consolidation or Google Workspace to M365: Start with Cloudiway for the G2 signal; evaluate MigrationWiz as the high-volume, MSP-tested alternative. The 4.9 versus 4.7 star difference matters less than which tool's support tier matches the team's internal technical depth. For smaller organizations without dedicated IT staff, Cloudiway's guided workflow is the more forgiving starting point among the best SaaS tools in this category.
SharePoint and Teams with complex governance requirements: ShareGate is the clearest fit. Using a generic mailbox-migration tool on a permission-heavy SharePoint environment is a well-documented path to remediation work that costs more than any license savings. The moment you outgrow simple file-transfer logic, ShareGate's specificity becomes an asset, not a limitation.
Single-cloud storage or infrastructure lift to AWS, Azure, or Google Cloud: Use the native tool first. AWS DataSync, Azure Storage Mover, and Google Storage Transfer Service are purpose-built for their ecosystems and free during initial migration windows. As of June 17, 2026, Azure revenue grew 40% year-over-year and Google Cloud revenue jumped 63%, per recent earnings reports — both hyperscalers are actively investing in migration tooling to keep that growth going. Paying a third-party license for work the hyperscaler's own tooling handles well is unnecessary cost.
Multi-cloud or hybrid at enterprise scale: Third-party workflow automation tools earn their price here. The native tools stop cooperating across vendor boundaries. At this scale, dependency mapping, automated workload classification, and real-time risk assessment are not premium features — they are the mechanism that separates the 65% who complete on time and on budget from the 38% who do not.
In my analysis, the single highest-leverage action in cloud migration planning is not tool selection — it is the formal readiness assessment that precedes tool selection. The 2.4x success-rate differential for organizations that run pre-migration assessments is the most actionable number in this entire dataset. The tool budget matters. The assessment budget matters more.
Frequently Asked Questions
What is the best cloud migration tool for a small business without a dedicated IT team?
As of June 17, 2026, Cloudiway and MigrationWiz are the highest-rated options on G2 for Microsoft 365 and Google Workspace migrations — the two scenarios most common for small businesses. Cloudiway's approximately 4.9-star rating and step-guided workflow make it accessible without deep technical staff. For teams moving to a single hyperscaler (AWS, Azure, or Google Cloud), the free native migration tools — AWS DataSync, Azure Storage Mover, Google Storage Transfer Service — are worth trying before paying for a third-party license.
How much does cloud migration typically cost in 2026, and what causes budget overruns?
Migration costs vary significantly based on data volume, source environment complexity, and tool choice. As of June 17, 2026, industry data shows 38% of migration projects exceed their planned budget, with the average overrun running 23% above original estimates. The primary drivers are underestimated dependency complexity, per-user or per-gigabyte licensing that scales faster than projected, and remediation work caused by skipping formal readiness assessments. Organizations that run pre-migration assessments report 2.4x higher success rates than those that skip them.
What cloud migration challenges can't even the best software fully solve?
As of June 17, 2026, the most persistent challenges include budget overruns (38% of projects), timeline slippage (31% miss planned schedules), and the emerging complexity of migrating AI workloads — which require planning for GPU capacity, inference cost patterns, and AI-specific data flows that most tools were not built to assess. Gartner reports that over half of migration projects fail to meet expectations primarily because of poor planning and tool selection mismatches, not tool failure alone. Multi-cloud environments add an average of $1.4 million per year in management overhead for large enterprises, an ongoing cost no one-time migration tool eliminates.
Disclaimer: This article is editorial commentary based on publicly reported data, G2 user reviews, and analyst research. Tool ratings, features, and pricing may change after publication. Always verify current details directly on vendor websites and G2. Research based on publicly available sources current as of June 17, 2026.