Compare 186 cloud migration consulting firms specialising in AWS, Azure, and Google Cloud workload migration, application modernisation, and hybrid cloud architecture. Profiles include hyperscaler partnership tiers, vertical specialisation, and verified buyer ratings. No provider pays for placement.
Cloud migration projects fall into three distinct categories: lift-and-shift rehosting, replatforming (changing managed services or databases), and refactoring for cloud-native architecture. Selecting the wrong partner for the wrong type of migration is the most common cause of overruns. The four global SI firms — Accenture, Deloitte, Capgemini, and Infosys — dominate complex multi-region migrations but charge a premium. Mid-market buyers should evaluate Slalom and 2nd Watch for AWS workloads and Avanade for Azure.
Procurement teams should verify hyperscaler partnership status (AWS Premier, Azure Expert MSP, Google Cloud Premier) and request named consultant CVs rather than firm-level credentials. Migration cost models split into three layers: discovery and assessment (typically 4-12 weeks, $80k-$400k), migration execution (per-workload basis), and post-migration optimisation. Fixed-fee engagements remain rare; most providers operate on T&M with capped not-to-exceed clauses.
Workload assessment tools have converged on a small number of platforms (AWS Migration Hub, Azure Migrate, CloudGenera, Cloudamize). Providers using proprietary assessment platforms should be questioned on data portability when the engagement ends. For hybrid and regulated workloads, see our guide on disaster recovery services and review cloud infrastructure platforms before selecting a target environment.
Tell us what you're evaluating and we'll send a tailored shortlist of vendors that actually fit — no vendor funding, no pay-to-play.
6,000+ vendors · 893 comparisons · 48 country guides · Independent & vendor-neutral