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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
7.6
Spot by Flexera enabled substantial savings in compute costs and enhanced efficiency, though ROI may take longer for some.
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
I have seen a return on investment as I was able to reduce my compute cost by 60 to 65% for some of my applications that needed light temporary processing tasks with ephemeral storage and stateless applications.
Dev Ops Engineer at a construction company with 11-50 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's customer service is highly rated for its excellent technical support, responsiveness, and reliability, ensuring customer satisfaction.
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
 

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
7.4
Spot by Flexera is highly scalable, effectively supporting multiple users across environments, particularly with AWS services, boosting user confidence.
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
7.0
Spot by Flexera is mostly stable and reliable, though some users report occasional bugs indicating room for improvement.
 

Room For Improvement

Proxmox VE faces challenges with performance, interface complexity, support, and lacks effective monitoring, documentation, and scalability features.
Spot by Flexera needs OCI support, better multi-cloud integration, and UI improvements, though it's stable and mature.
Continuously making advancements based on customer feedback.
Global Hyperscaler Alliances Director at a tech vendor with 1,001-5,000 employees
More guided onboarding would help teams adopt advanced features faster.
Dev Ops Engineer at a construction company with 11-50 employees
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
 

Setup Cost

Proxmox VE is an open-source, cost-effective virtualization solution with optional support, valued for its affordability against competitors.
Enterprise users praise Spot by Flexera's pricing and setup, with structured management of licensing, via AWS Marketplace.
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
 

Valuable Features

Proxmox VE provides a user-friendly, scalable, and affordable virtualization solution with strong community support and feature-rich environment.
Spot by Flexera offers cost optimization, Kubernetes management, and security compliance with intelligent autoscaling, AWS integration, and AI-driven insights.
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
My compute costs have reduced, capacity and production output have increased, and my overhead for maintaining custom scripts or doing some of the tasks manually has been saved.
Dev Ops Engineer at a construction company with 11-50 employees
One use case we plan to implement within the next few months is the overall commitment savings, which we used to manage manually, but with Spot, it automatically helps us detect when and what kind of instances to purchase, making it easier for us to manage our overall commitment for the savings plan.
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
3rd
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
5
Ranking in other categories
Cloud Management (23rd), Cloud Operations Analytics (1st), Cloud Analytics (2nd), Compute Service (9th), Containers as a Service (CaaS) (4th), Cloud Cost Management (5th)
 

Mindshare comparison

As of January 2026, in the Server Virtualization Software category, the mindshare of Proxmox VE is 13.9%, down from 18.6% compared to the previous year. The mindshare of Spot by Flexera is 0.2%, up from 0.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Server Virtualization Software Market Share Distribution
ProductMarket Share (%)
Proxmox VE13.9%
Spot0.2%
Other85.9%
Server Virtualization Software
 

Featured Reviews

Toby Champion - PeerSpot reviewer
Independent Consultant at Toby Champion Associates
Ensures a robust, user-friendly virtualization platform with seamless VM management, efficient resource allocation and a strong community for support
Improvements are needed for the API. Currently, there are several features inaccessible through the API, necessitating the use of either the WebUI or the command line interface. While the command line interface suffices, it's apparent that efforts are underway to enhance this aspect. In future releases, one potential feature enhancement could be improved remote screen access, allowing users to connect to the screen of another machine more seamlessly. Additionally, integrating with Terraform or providing better support for Terraform workflows might be beneficial, as there seems to be some lacking in that area. There's a minor inconvenience where you have to switch the license file from the open-source community license to an enterprise license.
KS
Dev Ops Engineer at a construction company with 11-50 employees
Intelligent autoscaling has cut compute costs and now manages ephemeral workloads efficiently
I think overall Spot is quite good. The UI is powerful, but it can feel a bit dense for some new users. More guided onboarding would help teams adopt advanced features faster, and deeper insights into Kubernetes resource usage would be beneficial. Overall, it is a really good platform that is quite mature and stable. I chose a rating of nine because it may sometimes be a bit overwhelming for newcomers, and there are also a few areas in which the EKS Kubernetes level granularity is a little missing. Overall, I think Spot is a really good and stable tool.
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Comms Service Provider
12%
Manufacturing Company
9%
Government
8%
Manufacturing Company
18%
Computer Software Company
16%
Healthcare Company
7%
Financial Services Firm
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business44
Midsize Enterprise11
Large Enterprise10
No data available
 

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 do you like most about Spot Ocean?
The solution helps us to manage and scale automatically whenever there is a limit to the increase in the application workflow.
What needs improvement with Spot Ocean?
Spot can be improved by adding deeper multi-cloud integrations, enhancing real-time security automation, and continuously making advancements based on customer feedback.
What is your primary use case for Spot Ocean?
I have been using Spot for five years. My main use case for Spot is cloud optimization.We use Spot for optimization by leveraging real-time optimization as well as auto-optimization. The company al...
 

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: December 2025.
881,082 professionals have used our research since 2012.