Spot.io Pricing and What Spot by Flexera Costs Per vCPU Hour

Spot.io, now sold as Spot by Flexera, publishes its rates on AWS Marketplace: $1.415 per 100 vCPU hours for managed compute, or $0.28 for every $1 of savings its optimization realizes, with no end date and a 14-day free trial. A 500 vCPU cluster running all month costs about $5,165 a month on the vCPU rate. The listing prints the rates but does not say which one applies to which product, so confirm that before you commit.

spot.io itself says to talk to sales, which is why most buyers assume there is no number. The Spot by Flexera Pay-As-You-Go listing sold by Spot on AWS Marketplace has a five-row rate card. We read it on 14 November 2026 and the arithmetic below is ours, shown so you can redo it with your own cluster size.

How much does Spot.io cost?

Spot.io pricing is usage-based and has two models on the listing. One bills by compute run under management, the other bills a share of the savings Spot says it produced. Both are metered through your AWS bill, and the listing says "subscriptions have no end date and may be canceled any time". It is marked as not a standard contract, so the legal terms sit in the Flexera subscription agreement it links to.

Two things stand out. The vCPU rate is the same for spot capacity and for on-demand and committed capacity, so moving workloads onto spot instances does not change the Spot fee. And three of the five rows print no unit at all. We read the $0.28 as a 28% share of realized savings because the listing describes that dimension as savings-based and an independent comparison puts the share at 25 to 28%, but the $0.001 and $0.15 rows are not explained. Treat those as questions for the vendor.

What does Spot.io cost per month for a real cluster?

The vCPU rate is $0.01415 per vCPU hour. A month has about 730 hours, so a vCPU running around the clock costs roughly $10.33 a month in Spot fees. That is on top of what AWS charges for the instances, which the listing says may also apply.

The savings model works the other way. At $0.28 per $1 of savings, $10,000 of realized savings in a month costs $2,800 and $50,000 costs $14,000. You keep the other 72 cents of each dollar saved, which is a fair deal if the savings are real and measured against a baseline you agree on. The same 500 vCPU cluster costs $5,165 a month on the vCPU rate, which equals the savings-share fee on about $18,400 of monthly savings. If your cluster saves more than that, the savings model costs more than metering the vCPUs would have.

Is there a free trial or a free plan?

Yes. The listing offers a 14-day free trial, and after it a freemium tier that covers up to 20 virtual machines, or you can continue pay-as-you-go. Twenty VMs is small for a production Kubernetes estate, so most teams will hit the paid rate within the first month. No refund terms are printed on the page, only a link to the subscription agreement.

How does Spot.io pricing compare with other cost tools?

The tools in this category charge in three different ways, so the only fair comparison is on your own numbers. The table uses the rates as we read them for our other pricing guides.

Spot is an automation product. It changes your infrastructure, replacing nodes and shifting workloads between capacity types, and the fee is the price of that automation. CostAnalyst is read-only. It reads billing exports and SaaS subscription lists, reports where the waste is, and prices at a flat rate that does not grow with your vCPU count. They answer different questions. For a head-to-head on the automation side, see CAST AI vs Spot.io, and for the wider field of tools that resize workloads, Kubernetes rightsizing tools. The parent company's own rate card is covered in Flexera pricing.

Is Spot.io worth the price?

When the fleet is large, mostly stateless and already tolerant of node churn, yes, because the savings from spot capacity usually dwarf a fee of about one cent per vCPU hour. When the fleet is small, stateful or mostly committed capacity that cannot move to spot, the vCPU fee applies to every core and the benefit shrinks. The test is simple. Take the vCPU count under management, multiply by $10.33, and compare it with the monthly saving you can document from a pilot. If the saving is not at least three times the fee, you are paying for automation you do not need yet.

Before you sign, a read-only look at the bill shows how much of the waste is automation work and how much is plain idle spend. A billing export through our one-time analysis lists the idle resources, oversized instances and unused commitments in dollars. Many teams find that a third of the saving is deletion and rightsizing that needs no per-vCPU fee at all. If you are building the business case for finance and want the cost of growth tracked next to it, the same logic applies to acquisition spend, where an SEO agency that works with SaaS companies is measured the same way, by what it returns against what it costs.

What to ask Spot before you sign

• Which of the five rate rows applies to our products, and what are the units on the $0.28, $0.001 and $0.15 rows?
• Is the savings share measured against on-demand list price or against our committed rates?
• Do vCPU hours count nodes that are stopped, in standby or part of the 20 VM free tier?
• Does the AWS Marketplace price match the direct price, and which draws down our AWS commitment?
• What are the cancellation and data terms in the subscription agreement the listing links to?

The short version

Spot.io pricing is public on its AWS Marketplace listing: $1.415 per 100 vCPU hours, about $10.33 per vCPU a month, or a $0.28 share per $1 of savings, with a 14-day trial and a 20 VM freemium tier. It is a good price for large, spot-friendly clusters and an expensive one for small or committed estates. If you would rather start with a read-only view of where your cloud and SaaS spend is going, on a flat price, see CostAnalyst's plans.