Cloud Migration Services That Move You Without Downtime

NubesFlow is our end-to-end cloud migration service: we assess your estate, design the target architecture, and move applications, data and infrastructure in controlled waves — with rollback at every step.

Effortless, Smart, and Secure Cloud Migration

Most migrations do not fail on technology. They fail on unknown dependencies, undocumented servers and a plan that assumes everything moves at once. NubesFlow starts from the opposite premise: discover first, migrate in small reversible waves, and prove each wave in production before moving the next.

We work across AWS, Microsoft Azure and Google Cloud, and we stay vendor-agnostic on purpose. The right destination depends on your licensing, your compliance boundaries and where your team already has skills — not on which provider we happen to resell.

Why teams choose NubesFlow

Cutovers measured in minutes

Continuous block-level and database replication keeps the target in sync, so the switch is a DNS change and a verification checklist — not a weekend outage.

No surprise dependencies

Agent-based and agentless discovery maps every inbound and outbound flow before we group workloads into waves, which is where most migration overruns come from.

Cost modelled before you commit

You see the projected monthly run rate, rightsizing assumptions and commitment options before migration starts, so the business case survives contact with the invoice.

Reversible at every step

Every wave has documented rollback criteria and a tested path back. Nothing is decommissioned until the new environment has run clean under real load.

How the migration runs

  1. Assess

    Inventory, dependency mapping, licence review and a migration readiness score per application. Output: a wave plan and a target-state cost model.

  2. Design & build the landing zone

    Accounts or subscriptions, network topology, identity, logging, backup and guardrails — provisioned as infrastructure as code so it is reproducible.

  3. Migrate in waves

    Start with low-risk workloads to validate the pipeline, then scale up. Each wave includes replication, test cutover, production cutover and validation.

  4. Optimise & hand over

    Rightsize instances, apply commitment discounts, tune monitoring and alerting, deliver runbooks and train your team to operate the estate.

Common scenarios we handle

Data centre exit

A hard lease or hardware-refresh deadline, hundreds of VMs, and limited documentation. We work backwards from the deadline and sequence waves around it.

VMware to public cloud

Move VMware estates to native cloud instances or a managed VMware service, depending on how much application change your team can absorb right now.

Cloud-to-cloud and multi-cloud

Consolidating after an acquisition, or splitting workloads across providers for resilience, data residency or commercial leverage.

Cloud migration FAQs

How long does a cloud migration take?

A single application typically takes two to six weeks from assessment to cutover. A full data centre exit of 100–300 workloads usually runs six to twelve months, executed as parallel waves. The assessment phase gives you a wave-level schedule before you commit to the full programme.

How much downtime should we expect?

For most workloads, minutes. We use continuous replication so the target environment is already in sync, which reduces cutover to a final delta sync, a DNS or load balancer change, and validation. Legacy applications with single-instance databases and no replication support are the exception, and we flag those during assessment.

Which cloud provider should we migrate to?

It depends on your existing licensing (Microsoft agreements often change the maths), compliance and data residency requirements, the managed services your applications need, and your team's current skills. We produce a weighted comparison across AWS, Azure and Google Cloud as part of the assessment rather than starting from a preferred answer.

Do you rewrite our applications?

Only where it pays for itself. We assess each workload against rehost, replatform and refactor options and recommend the cheapest path that meets your performance, compliance and operational goals. Many estates migrate mostly as rehost, with a handful of high-value applications replatformed onto managed databases or containers.

What happens if a migration wave goes wrong?

Each wave has documented rollback criteria agreed before cutover and a tested path back to the source environment, which stays running until the wave is signed off. That is why we decommission source infrastructure only after the new environment has handled real production load.

Can you migrate our databases without losing data?

Yes. We use log-based continuous replication for supported engines, which keeps the target current and lets us validate row counts and checksums before cutover. For unsupported or heavily customised engines, we use a backup-and-restore window with a defined maintenance period.

Ready to plan your migration?

Tell us what you are running today and what is forcing the timeline. We will come back with a wave plan, a target-state cost model and the risks worth worrying about.

Location

Barcelona, Spain

Business Hours

Mon – Fri: 9:00 – 18:00 CET

Support

24/7 Cloud Support Available

Send us a message