Move applications between clouds, providers, or architectures — with refactoring options from lift-and-shift to full replatforming.
Talk to a migration architectApplication migration is harder than infrastructure migration because the application itself may need to change. A lift-and-shift of a stateful PHP app to serverless won't work; a refactor of a monolith to microservices is a multi-month project. The 6 R's — Retain, Retire, Rehost, Replatform, Refactor, Repurchase — give you a framework, but the execution is where most projects fail.
CB4UHost migrates applications using the right strategy per app — not a one-size-fits-all approach. We lift-and-shift the simple ones, replatform the medium ones, and refactor the ones that will benefit. We use our 6 R's Migration Planner to make the strategy explicit and defensible.
We've migrated apps between AWS, GCP, Azure, on-prem, and back. We've refactored monoliths to microservices, replatformed VM apps to Kubernetes, and migrated legacy PHP/Java apps to modern frameworks. We know the gotchas — and we plan around them.
Every migration ends with documentation, runbooks, and a 30-day monitoring window to catch any issues that surface after cutover.
Each application gets a Retain/Retire/Rehost/Replatform/Refactor/Repurchase recommendation with rationale.
Step-by-step migration plan with timelines, owners, and rollback triggers.
Code changes for replatforming or refactoring — done by our engineers, reviewed by your team.
Tested cutover and rollback plan, executed with on-call support.
30-day monitoring to catch latency, error rate, or performance issues.
Architecture docs, runbooks, and a 60-minute walkthrough for your team.
We inventory your apps and classify each with the 6 R's framework.
We build the migration plan and do any necessary refactoring or replatforming.
We execute the cutover with tested rollback.
We monitor for 30 days and fix any issues.
We hand over docs, runbooks, and a walkthrough.
Interactive tools related to this service.
Retain (keep as-is), Retire (decommission), Rehost (lift-and-shift), Replatform (lift-and-tweak), Refactor (re-architect), Repurchase (replace with SaaS). We classify each app and recommend the right strategy.
Rehost is faster and cheaper but carries technical debt. Refactor is slower and pricier but unlocks cloud-native benefits (autoscaling, managed services, lower running cost). We recommend based on the app's business value, lifespan, and current pain points.
Yes. We've migrated legacy PHP apps to modern frameworks, Java monoliths to Spring Boot microservices, and .NET Framework apps to .NET Core on Linux. Legacy migration is a specialty.
Yes — we design the target architecture (Kubernetes, serverless, PaaS, etc.) as part of the migration. See our Hybrid Cloud Architecture and Containerization services.
Migrate VMs, storage, and networking from one provider to another — with zero-drama cutover, rollback, and post-migration optimization.
Migrate databases, data warehouses, and data lakes with replication, validation, and zero-data-loss cutover — across providers and formats.
Containerize legacy apps and orchestrate them on Kubernetes — Docker, EKS, AKS, GKE, or self-hosted K8s.
Tell us about your project. We'll come back with a scoped proposal and a fixed-fee quote.
Talk to a migration architect