Oracle Cloud free tier and the upgrade to pay as you go

Oracle Cloud Infrastructure occupies an unusual position. The Oracle Cloud free tier is by a distance the most generous permanent allowance of any major provider, and getting hold of the most attractive part of it can be genuinely difficult. Both facts are worth knowing before you plan anything around it.

What the Oracle Cloud free tier includes

The headline items, as they have stood for some time:

• A pool of Arm based Ampere compute, allocated flexibly across one or more instances, with a substantial memory allowance alongside it.
• Two small AMD based virtual machines.
• Block volume storage, split across boot and data volumes.
• Object and archive storage allowances.
• Two autonomous databases.
• A load balancer with a modest bandwidth cap.
• A very large monthly outbound data transfer allowance.

The Arm pool is the interesting one. Split into a single instance, it is a capable machine that will comfortably run a container host, a small database and an application, permanently, at no cost. Nothing else in the market matches that.

The egress allowance deserves attention too. Oracle prices outbound transfer far below the other major providers and includes a large free monthly allowance, which is a genuine structural difference rather than a promotion.

The capacity problem

Free Arm capacity is heavily oversubscribed in popular regions, and the console returns an out of host capacity error when none is available. This is not a fault in your account and there is no setting to change.

Three things that help:

• Pick a quieter home region. The region is set when the account is created and cannot be changed afterwards, so this decision is worth ten minutes of thought.
• Try different availability domains. Capacity is per domain, not per region.
• Upgrade to pay as you go. This is the reliable fix. Paid accounts get much better access to Arm capacity while keeping the always free allowances.

The trial credit

Separately from the always free tier, new accounts receive a credit balance valid for a fixed window, commonly quoted as $300 over 30 days. It unlocks the paid services for evaluation.

The relationship between the two is the part people get wrong. When the trial ends, the account does not stop: it either upgrades to pay as you go, in which case everything continues and the always free resources remain free, or it reverts to always free only, in which case anything outside the free allowance is stopped and eventually removed.

Upgrading before the trial window closes is almost always the right move, because it costs nothing on its own and removes the capacity restrictions.

The compute shapes

OCI uses flexible shapes: you choose a shape family and then set the OCPU count and memory independently within its limits. An OCPU is a physical core with hyperthreading, so one OCPU generally corresponds to two vCPUs elsewhere. That is worth remembering when comparing prices, because a like for like comparison against a vCPU figure will otherwise be wrong by a factor of two.

The families cover AMD, Intel and Ampere Arm standard shapes, plus dense IO shapes with local NVMe and GPU shapes for accelerated work.

Outbound mail

Oracle blocks outbound port 25 by default and lifting it requires a request that is reviewed. If mail delivery is part of your plan, treat this as a prerequisite rather than a detail. The general position across providers is in outbound port 25 on cloud servers.

Who it suits

Oracle Cloud is worth a serious look if you want a permanently free machine that is actually useful, if your workload is egress heavy, or if you are already an Oracle Database customer and the licensing works in your favour.

It is a harder sell if you want the ecosystem, the documentation depth or the third party tooling coverage of the larger three. The console is capable and idiosyncratic, and the terminology takes a week to internalise.

For a comparison against the other enterprise leaning option in the catalogue, see Oracle Cloud vs IBM Cloud. If the free allowance is the attraction, the AWS free tier and the Google Cloud trial work on quite different principles.