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IBM PowerVM vs VMware ESXi comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 6, 2024

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
7.7
PowerVM saves costs by charging for allocated cores, proving more cost-effective and reliable than physical servers over five years.
Sentiment score
4.6
VMware ESXi boosts efficiency and saves costs, but some users consider alternatives due to rising expenses and ROI challenges.
The return on investment is substantial, though other platforms may offer a better ROI, primarily due to lower costs involved in setup and maintenance.
If calculated over a five-year period, IBM PowerVM is 30 to 40% more cost-effective than physical servers despite initial costs seeming high.
 

Customer Service

Sentiment score
7.8
IBM PowerVM's support is praised for responsiveness and expertise, though challenges arise without subscriptions; stability minimizes service need.
Sentiment score
7.4
VMware ESXi support is generally positive, though Broadcom acquisition caused some delays; users praise higher-level support efficiency.
IBM provides strong support.
IBM offers excellent customer support.
IBM's technical support is outstanding, with seamless global coordination and prompt resolutions.
I rate the technical support from VMware as nine or ten out of ten.
In the last three or four years, we did not require any support from VMware engineers, indicating its high reliability.
Customer service and support are good; they are reachable, and at times remote support suffices.
 

Scalability Issues

Sentiment score
8.1
IBM PowerVM excels in scalability and flexibility, efficiently managing resources and users for both small and large enterprises.
Sentiment score
7.8
VMware ESXi is highly scalable, widely used globally, supporting extensive infrastructures despite some licensing challenges, rated 8-9/10.
An IBM server can handle up to sixty-four terabytes of RAM.
The product is scalable due to PowerVM's virtualization features, such as shared processor functionality and partition mobility.
I think IBM PowerVM uses a 'pay as you grow' model, allowing customers to scale their resources as needed.
The solution is scalable, allowing us to scale up or down regardless of infrastructure size.
vCenter Server can manage up to 1,000 ESXi servers within a single UI interface, allowing extensive deployment and management capabilities.
My customers are highly satisfied with its scalability.
 

Stability Issues

Sentiment score
8.5
IBM PowerVM is praised for exceptional stability and uptime, outperforming competitors like SPARC, Nutanix, and VMware in reliability.
Sentiment score
8.2
VMware ESXi is praised for stability, resolved issues, and dependable performance, with occasional downtime and seamless integration noted.
The stability of IBM PowerVM is exceptional, as industry reports have named IBM Power and Z as the most stable platforms globally for 15 consecutive years.
Our clients in India using Power Servers have been running their servers for the last four to five years without any reboot.
The product operates reliably, and following IBM’s best practices ensures robust stability.
ESXi is stable, and our business operations depend on it year after year.
 

Room For Improvement

IBM PowerVM needs usability, pricing, automation, integration improvements, and a GUI to better compete and enhance user experience.
Users seek cost-effective VMware ESXi with simpler licensing, improved support, easier management, and better scalability post-Broadcom acquisition.
We have a strong relationship with IBM, which aids decision-making in transitioning clients from mainframe to other platforms.
PowerVM should integrate some capabilities of VMware vCenter to improve its management features.
From a product perspective, I would like to see faster certification of open-source products on IBM Power Systems.
Providing a mobile application for remote access to ESXi servers would be beneficial.
It's not cost-effective for small users and creates a gap for alternatives, while favoring larger clients.
The cost of VMware ESXi is very high, especially after the acquisition by Broadcom, which led to price increases.
 

Setup Cost

IBM PowerVM pricing is high but offers reliability, flexible licensing, and potential TCO savings despite cheaper alternatives.
VMware ESXi's high pricing and complex licensing model post-acquisition lead to increased costs, requiring tailored licensing for efficiency.
Pricing is a concern in Argentina due to the higher cost of mainframe solutions.
PowerVM itself is free with the purchase of an IBM server.
While initially costly, the ROI over five years proves IBM PowerVM is cost-effective, resulting in a 30 to 40% reduction in costs compared to a physical setup.
The product is very cost-effective, though not fixed, as pricing tends to fluctuate over time.
The solution is moderately priced, not exactly cheap yet not overly expensive either.
The pricing is expensive, with the cost for customers ranging from $10,000 to $20,000 yearly.
 

Valuable Features

IBM PowerVM offers stability, flexibility, and high availability with robust virtualization, cloud integration, and optimized workloads for Oracle and SAP HANA.
VMware ESXi provides efficient server management with features like vMotion and disaster recovery, plus seamless third-party integration and scalability.
Features like partition mobility enhance the machine's capabilities, making it an ideal tool for virtual environments with reliability, availability, and serviceability.
PowerVM excels in efficiently managing all systems and environments, including development, UI, and production.
It supports specific workloads, like Oracle and SAP HANA, much better due to its shared processor pool feature which reduces licensing costs.
Its capability to move virtual machines to physical machines is very efficient for our live environment.
As a level one or bare metal hypervisor, its unmatched scalability depends on underlying hardware, capable of managing large numbers of physical servers with one management platform.
The most important features are having a lot of code and CPU threads to ensure the system doesn't lag.
 

Categories and Ranking

IBM PowerVM
Ranking in Server Virtualization Software
9th
Average Rating
8.6
Reviews Sentiment
7.2
Number of Reviews
37
Ranking in other categories
No ranking in other categories
VMware ESXi
Ranking in Server Virtualization Software
7th
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
32
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2025, in the Server Virtualization Software category, the mindshare of IBM PowerVM is 1.3%, up from 1.1% compared to the previous year. The mindshare of VMware ESXi is 1.3%, up from 0.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Server Virtualization Software
 

Featured Reviews

Atif Najam - PeerSpot reviewer
Offers mobility and you can seamlessly move a VM between different PowerVM instances
PowerVM is likely one of the most stable hypervisors available, albeit highly specialized. However, it is solely command-line based. When someone manages virtualization as a whole, they typically expect a graphical user interface (GUI) for configurations. This is the case for Hyper-V, XenServer, and VMware. But with PowerVM, you need to understand and memorize commands to operate the hypervisor. I believe PowerVM should have a GUI; that would be a significant improvement.
Syed Ali Waqas - PeerSpot reviewer
Efficiently manages development environments with robust network integration
I recommend new users download and evaluate the free version from VMware's website. Once satisfied, they should purchase the professional version for a smooth and secure IT infrastructure. The professional version is cost-effective, allowing one to create multiple servers on a single server. I'd rate the solution ten out of ten.
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Top Industries

By visitors reading reviews
Computer Software Company
17%
Financial Services Firm
11%
Manufacturing Company
7%
Government
6%
Manufacturing Company
18%
Computer Software Company
10%
Financial Services Firm
9%
Educational Organization
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What do you like most about IBM PowerVM?
Managing other operating systems is also straightforward with IBM PowerVM.
What is your experience regarding pricing and costs for IBM PowerVM?
IBM’s licensing model offers flexibility in subscription terms, now allowing one- to five-year options. They have introduced a subscription-based model for some systems, creating a more cost-effect...
What needs improvement with IBM PowerVM?
From a product perspective, I would like to see faster certification of open-source products on IBM Power Systems ( /products/ibm-power-systems-reviews ). While the product has robust features and ...
What do you like most about VMware ESXi?
My customers are satisfied with the solution’s performance.
What is your experience regarding pricing and costs for VMware ESXi?
VMware ESXi is extremely expensive now compared to a few years ago. It's a core-based license now. We have bought VCF for about more than 2,000 cores. It's not a user-based license, and when you co...
What needs improvement with VMware ESXi?
It would be better if it had some scaling out features such as Kubernetes, automatic scale-out features, or automatic scheduling scale-out features, without being in a containerized platform such a...
 

Comparisons

 

Also Known As

PowerVM
No data available
 

Overview

 

Sample Customers

Sto, Soitec, SNO, Bundesrechenzentrum GmbH, Al Mansour Holding, Baptist Health of Northeast Florida, Huhtamaki, ELK Group, IT-Informatik, Arkansas Tech University, Pneuhage
Information Not Available
Find out what your peers are saying about IBM PowerVM vs. VMware ESXi and other solutions. Updated: July 2025.
865,384 professionals have used our research since 2012.