What usually triggers a cloud migration?
Mergers and acquisitions are the most common trigger. Other causes include platform capability gaps, post-acquisition cost restructuring, and organisational changes.
Cloud Migration Services
Azure Cloud Migration Services
Cloud migration done poorly means downtime, data loss, and spiralling costs. Done right, your old environment stays live until the new one is validated — and your teams notice nothing except that everything works better.
Decision Foundry has delivered cloud migrations for organisations running 100+ resources using a blue-green methodology that protects your operations throughout.
- Blue-green migration methodology — zero forced downtime
- Full validation in parallel before any cutover
- Individually certified engineers across Azure, AWS, and GCP
- Delivered for organisations running 100+ resources
The Reality
Is this familiar?
Your cloud environment has grown organically and nobody knows what half of it does or who owns it
You're going through a merger or acquisition and two cloud environments need to become one
Your current platform is falling behind on AI capabilities and you need to move
Post-acquisition infrastructure is carrying duplicated resources and unoptimised spend
Your teams are afraid to touch the migration because the risk of downtime feels too high
What We Do
Cloud migration services we offer
Migration Assessment & Readiness Review
We map all workloads, identify orphan resources, and build a complete picture of what needs to move and what can be decommissioned.
Migration Architecture & Planning
We design the target environment, data flows, security configuration, and parallel running strategy before any build begins.
Tenant to Tenant Migration
Moving between instances of the same platform — restructuring, consolidating, or separating environments as required.
Platform to Platform Migration
Full build, validation, and switchover across any cloud combination — Azure to AWS, AWS to GCP, and more.
Blue-Green Migration Execution
We run old and new environments in parallel, validate thoroughly, and cut over in a controlled maintenance window.
Post-Migration Optimisation
Once live, we audit usage, remove unused resources, and optimise for cost and performance.
Not sure if migration is the right move for your organisation? We'll assess your current environment and give you an honest answer — before you commit to anything.
Talk to Our TeamWhy Migrate
Why organisations migrate
Mergers & Acquisitions
The most common trigger. When two organisations combine, their cloud environments rarely match — consolidation becomes a necessity.
Platform Capability Gaps
If one platform falls behind, particularly on AI, the case for migration builds.
Cost Restructuring
Post-acquisition environments often carry duplicated resources and unoptimised spend. Migration is the opportunity to rationalise.
Organisational Restructuring
Business units being separated or consolidated require their cloud environments to follow.
One thing that rarely justifies migration alone: a cost difference of less than 30%. We'll tell you honestly if it doesn't make commercial sense.
The Basics
What is cloud migration?
Cloud migration is moving your workloads, data, applications, and infrastructure from one environment to another. We handle two types:
Tenant to Tenant
Moving from one instance of the same platform to another — common in mergers, acquisitions, and restructures.
Platform to Platform
Moving from one cloud provider to another — Azure to AWS, AWS to GCP, and so on.
The three major platforms we work across
Microsoft Azure
AWS
GCP
The Process
How we deliver it
Seven phases from discovery through optimisation — every phase with clear deliverables.
STEP 01
Discovery & Assessment
We map every workload, resource, and dependency — with specific focus on orphan resources that create hidden migration risk.
STEP 02
Migration Architecture Design
We design the target environment and plan the full migration. Nothing gets built until the architecture is agreed.
STEP 03
Build the Target Environment
We build the new environment in parallel. Your current operations continue without interruption.
STEP 04
Data Migration & Validation
We migrate and validate data, functionality, and security in the new environment before any cutover is approved.
STEP 05
UAT & Sign-Off
Your team tests the new environment. We don't proceed until everything is validated and approved.
STEP 06
Controlled Cutover
Switchover happens in a planned maintenance window — typically a weekend or off-peak period. Downtime is minimised to hours.
STEP 07
Post-Migration Optimisation
We audit, decommission the old environment, and optimise for cost and performance.
Typical timeline: 6 weeks for 100–120 resources. Larger environments take longer — scoped accurately during assessment.
Our Methodology
The blue-green method: why it matters
BLUE
Current environment — stays live throughout
GREEN
New environment — built and validated in parallel
Your current environment, blue, stays live throughout. We build the new environment, green, in parallel. Once green is validated, the cutover happens in a short controlled window. The old environment stays on standby until you're confident.
Why it matters
- No forced downtime during migration
- Full validation before anything goes live
- Clear fallback if anything unexpected happens
- Your teams continue working normally throughout
One thing worth flagging
A word on orphan resources
Orphan resources are systems or workloads with no clear owner and no documented purpose. They create hidden dependencies that only surface when something breaks in the new environment. We identify and resolve them in the assessment phase — before anything moves.
Why Us
Why Decision Foundry
Delivered migrations at scale
We've delivered cloud migrations for organisations running 100+ resources — including the complications that don't appear in the plan.
Individually certified engineers
Specialist-level certifications across Azure, AWS, and GCP — individual certifications that reflect hands-on capability.
Data expertise as a foundation
We understand how your data flows, what your pipelines depend on, and what needs to be preserved. Most infrastructure-only partners miss this.
Blue-green methodology as standard
We run in parallel, validate thoroughly, and cut over in a controlled window — every time.
Honest commercial advice
If the migration doesn't make commercial sense, we'll tell you before you commit.
Who Benefits
Who an Azure cloud migration is for
Buyers
- CTO
- CIO
- IT Director
- VP of Infrastructure
Users
- Cloud Architects
- DevOps Engineers
- Infrastructure Managers
Influencers
- IT Managers
- Head of Operations
- CFO
Ready to plan?
Ready to plan your Azure cloud migration?
Whether you're moving between tenants or switching platforms entirely, the starting point is the same — a clear picture of what you have, what you need, and what the move looks like.
Book a free cloud migration assessmentCommon Questions
Cloud Migration FAQs
Is it worth migrating just to save on cloud costs?
Rarely. Migration cost typically offsets modest savings. We assess this honestly — if it doesn't stack up, we'll say so.
How much downtime will we experience?
Using blue-green methodology, downtime is minimised to 2–5 hours in a controlled window. Complex cases may require longer — scoped during assessment.
Will our data be safe during the migration?
Yes. We validate data thoroughly before cutover, run environments in parallel, and maintain a fallback option throughout.
What are orphan resources?
Systems or workloads with no clear owner or documented purpose. We identify and resolve them before migration begins.
How long does a migration take?
Around 6 weeks for 100–120 resources. Larger environments take longer — scoped during discovery.
Can we migrate part of our environment?
Yes. Partial migrations are possible — we assess whether a hybrid or full migration makes more sense during discovery.
We don't know which platform to move to — can you help?
Yes. We evaluate your requirements against Azure, AWS, and GCP and recommend the right destination. We're not aligned to any one platform.