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Proxmox VE vs Spot by Flexera comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jan 19, 2026

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
7.5
Proxmox VE offers cost savings, enhanced server capabilities, and improved efficiency, with benefits outweighing its learning curve challenges.
Sentiment score
7.9
Spot by Flexera cut compute costs by 75%, saved over 500,000 euros annually, and improved flexibility and operations.
A lot of money was saved after starting to use Spot by Flexera. I would say around 500,000 euros per year.
License manager at a financial services firm with 10,001+ employees
I cannot share the exact number, but I can share the figure that my EC2 and EKS compute cost reduced by around 65 to 75% with Spot.
Dev Ops Engineer at a construction company with 11-50 employees
Our technology predicts demand, selects the cheapest instance mix, sizes the workloads appropriately, and scales it automatically based on policy, resulting in significant savings by reducing manual work and enhancing our flexibility, which has helped accelerate our deployments.
Global Hyperscaler Alliances Director at a tech vendor with 1,001-5,000 employees
 

Customer Service

Sentiment score
7.4
Proxmox VE users often utilize community resources and documentation over paid support, though improved direct communication is desired.
Sentiment score
8.4
Spot by Flexera provides responsive and effective customer service, receiving high ratings for their excellent technical support.
I would rate the customer support a nine out of ten.
Global Hyperscaler Alliances Director at a tech vendor with 1,001-5,000 employees
We did not have to use it many times, but the few times that we did use it, it was very fast and very useful.
License manager at a financial services firm with 10,001+ employees
 

Scalability Issues

Sentiment score
7.2
Proxmox VE is praised for its scalability, ease of resource addition, and seamless migrations, though vertical scaling could improve.
Sentiment score
7.6
Spot by Flexera is scalable, adaptable, and open-source, effectively managing AWS expansions and connecting diverse data sources.
It is also a very easy tool to connect to different data sources and different servers since it is open source.
License manager at a financial services firm with 10,001+ employees
Spot's scalability is quite good, and it can be expanded to multiple environments.
Dev Ops Engineer at a construction company with 11-50 employees
 

Stability Issues

Sentiment score
8.1
Proxmox VE is highly stable and reliable, performing well on older hardware with minimal performance issues.
Sentiment score
6.3
Spot by Flexera is stable but faces data update delays, requiring manual IT asset corrections and user-reported server discrepancies.
In Spot by Flexera, we could see both computers, the old and the new one, but the system was not recognizing that the old one was no longer being used.
License manager at a financial services firm with 10,001+ employees
 

Room For Improvement

Proxmox VE faces challenges with performance, interface complexity, support, and lacks effective monitoring, documentation, and scalability features.
Spot by Flexera could improve through storage cost optimization, better integrations, enhanced UI guidance, timely updates, and Kubernetes insights.
Spot could be improved by adding features that help identify data to optimize storage costs by detecting datasets within our environment based on criteria such as age and usage.
AVP DevOps and Product Support at a recruiting/HR firm with 1,001-5,000 employees
We had a couple of IT assets that were not being used, and we had this information in our internal servers, but Spot by Flexera was not able to update on time.
License manager at a financial services firm with 10,001+ employees
Continuously making advancements based on customer feedback.
Global Hyperscaler Alliances Director at a tech vendor with 1,001-5,000 employees
 

Setup Cost

Proxmox VE is an open-source, cost-effective virtualization solution with optional support, valued for its affordability against competitors.
Users praise Spot by Flexera's pricing for its competitiveness and convenience, rating it highly against market alternatives.
The pricing is reasonable and convenient, and the value it offers is completely in line with what I am spending.
Dev Ops Engineer at a construction company with 11-50 employees
I was aware of different pricing, setup costs, and licensing across the company.
License manager at a financial services firm with 10,001+ employees
 

Valuable Features

Proxmox VE provides a user-friendly, scalable, and affordable virtualization solution with strong community support and feature-rich environment.
Spot by Flexera optimizes cloud costs, manages resources efficiently, and integrates with AWS, improving scalability and decision-making with AI.
Spot's automated cost optimization works by continuously analyzing the workload and applying policies to minimize cloud spend without sacrificing performance.
Global Hyperscaler Alliances Director at a tech vendor with 1,001-5,000 employees
The fact that it can mix dozens of instance families dynamically is something which the AWS native autoscalers simply cannot do.
Dev Ops Engineer at a construction company with 11-50 employees
Spot helps us detect such changes within AWS at least one hour prior, allowing us to have a mitigation plan in place and host other servers within the same setup to avoid impacting the application.
AVP DevOps and Product Support at a recruiting/HR firm with 1,001-5,000 employees
 

Categories and Ranking

Proxmox VE
Ranking in Server Virtualization Software
4th
Average Rating
8.6
Reviews Sentiment
7.3
Number of Reviews
62
Ranking in other categories
No ranking in other categories
Spot by Flexera
Ranking in Server Virtualization Software
14th
Average Rating
8.6
Reviews Sentiment
7.5
Number of Reviews
6
Ranking in other categories
Cloud Management (19th), Cloud Operations Analytics (1st), Cloud Analytics (3rd), Compute Service (9th), Containers as a Service (CaaS) (3rd), Cloud Cost Management (5th)
 

Mindshare comparison

As of May 2026, in the Server Virtualization Software category, the mindshare of Proxmox VE is 10.9%, down from 18.2% compared to the previous year. The mindshare of Spot by Flexera is 0.6%, up from 0.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Server Virtualization Software Mindshare Distribution
ProductMindshare (%)
Proxmox VE10.9%
Spot by Flexera0.6%
Other88.5%
Server Virtualization Software
 

Featured Reviews

Juan Barandiaran - PeerSpot reviewer
CTO at BCloud Services SAC
Effortless management with robust support enhances performance and cost savings
My primary use case for Proxmox VE focuses on replacing VMware solutions and migrating to a Centric Solution for medium-sized companies. This product serves as a hypervisor in environments where performance is crucial Proxmox VE has provided performance improvements, particularly with its…
Bruna Müller - PeerSpot reviewer
License manager at a financial services firm with 10,001+ employees
Centralized asset data has transformed how we manage licenses and make cost-saving decisions
One problem that we faced using Spot by Flexera is that in certain servers, the data was not being updated correctly, and we had a certain delay. For example, someone was using a computer, and then this user received a new one. In Spot by Flexera, we could see both computers, the old and the new one, but the system was not recognizing that the old one was no longer being used. We had a couple of IT assets that were not being used, and we had this information in our internal servers, but Spot by Flexera was not able to update on time. We had to fix this information manually.
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Top Industries

By visitors reading reviews
Comms Service Provider
12%
Computer Software Company
10%
Manufacturing Company
9%
Government
7%
Financial Services Firm
13%
Manufacturing Company
11%
Computer Software Company
9%
Healthcare Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business44
Midsize Enterprise11
Large Enterprise10
By reviewers
Company SizeCount
Small Business2
Large Enterprise6
 

Questions from the Community

Proxmox vs ESXi/vSphere: What is your experience?
For me the biggest impact is the cost of licensing in the case of VMware despite its overall intuitiveness and ease of handling and management. However, KVM-based Open Source solutions are becoming...
How does Proxmox VE compare with Hyper-V?
One of the best things about Proxmox VE is that it is open-source and very inexpensive. You get all of the same features as with the more well-known products. Proxmox VE is very easy to deploy - it...
Proxmox VE or KVM?
I use Proxmox VE and have been very happy with it. In my opinion, it is a complete and stable solution with excellent tools for managing servers. It has a lot of different features, and I also love...
What needs improvement with Spot Ocean?
One problem that we faced using Spot by Flexera is that in certain servers, the data was not being updated correctly, and we had a certain delay. For example, someone was using a computer, and then...
What is your primary use case for Spot Ocean?
For the past two years, I have been developing a project to implement Spot by Flexera as a software asset management tool. It is used to manage all the IT assets and software licenses within all th...
What advice do you have for others considering Spot Ocean?
The interface of Spot by Flexera was very simple to use. Spot by Flexera Academy had lots of important information that made the usage even easier. In general, I do not think there are any addition...
 

Comparisons

 

Also Known As

No data available
Spot Ocean, Spot Elastigroup, Spot Eco
 

Overview

 

Sample Customers

Municipality of Trento, SwitchMIA, inDenova, Valmeita City Council, Alpha IT AS, Grupo Inversor Veracruzano S.A.P.I. de C.V. (GRIVER), Laut und Schoen, IT-Services - Hamburg e.K., KMI Learning, Dynacom Tankers Management Ltd., Serwise AG
Freshworks, Zalando, Red Spark, News, Trax, ETAS, Demandbase, BeesWa, Duolingo, intel, IBM, N26, Wix, EyeEm, moovit, SAMSUNG, News UK, ticketmaster
Find out what your peers are saying about Proxmox VE vs. Spot by Flexera and other solutions. Updated: April 2026.
893,221 professionals have used our research since 2012.