Technology
Is cloud computing always cheaper
Cloud services turn infrastructure purchases into on-demand consumption. They can reduce some costs but add variable billing, transfer charges, operations and dependencies that need to be measured.
Sources consulted on 2026-09-15

Context
Cloud mainly changes the cost model
Instead of buying and depreciating an entire infrastructure, an organization can consume compute, storage and managed services on demand. That brings elasticity and speed, but spending becomes more variable and distributed across many billing lines.
Consensus
Managed services can save operational work
Managed databases, backups, monitoring and high availability can remove part of the internal workload and accelerate delivery. Their price includes that operational value. Comparing CPU or disk alone ignores staff, licences, power and operations in the alternative model.
Controversy
Bills can grow without a visible purchase
Data egress, logs, forgotten storage, duplicated environments and oversized resources create cumulative spending. The elasticity that lets capacity grow quickly can also let cost grow quickly when limits and alerts are poorly designed.
Consequences
Exit and portability have economic value
Changing provider can require data transfer, technical adaptation and renewed qualification. The EU Data Act includes rules on switching data-processing services and the phase-out of certain switching charges, while technical and organizational dependencies can still remain.
Guidance
Measure a real architecture over a real period
LES5C / 05
The essentials, not the last word
Cloud is neither automatically cheaper nor automatically more expensive. Compare the total cost of the real service, including traffic, availability, backups, skills, growth and exit costs, rather than the price of one virtual machine.
This overview is neither exhaustive nor personal advice. Limitations and sources are part of the argument.
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