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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
6.4
IBM PowerVM offers cost savings and efficiency, especially in Oracle licensing, while proving more cost-effective than physical servers long-term.
Sentiment score
4.7
VMware ESXi boosts efficiency and eases management, but rising costs lead to interest in more cost-effective alternatives.
The return on investment is substantial, though other platforms may offer a better ROI, primarily due to lower costs involved in setup and maintenance.
Drirector at a construction company with 201-500 employees
If calculated over a five-year period, IBM PowerVM is 30 to 40% more cost-effective than physical servers despite initial costs seeming high.
Solution Sales Specialist at TD SYNNEX
 

Customer Service

Sentiment score
6.7
IBM PowerVM's support is responsive and efficient, with knowledgeable staff, though some users seek improvement in specific areas.
Sentiment score
6.9
VMware ESXi support is generally praised for expertise, despite mixed response times and quality post-Broadcom transition.
IBM provides strong support.
Drirector at a construction company with 201-500 employees
IBM offers excellent customer support.
IT Specialist at Saudi Business Machines - SBM
IBM's technical support is outstanding, with seamless global coordination and prompt resolutions.
Brand Leader at a tech services company with 1,001-5,000 employees
I rate the technical support from VMware as nine or ten out of ten.
SAP B1 Support Consultant at Abacus Consulting
In the last three or four years, we did not require any support from VMware engineers, indicating its high reliability.
Head IT at Burraq Cyber Security Solutions
Customer service and support are good; they are reachable, and at times remote support suffices.
Team Lead Virtualization at Hybrid Tech
 

Scalability Issues

Sentiment score
8.2
IBM PowerVM is praised for its scalability, seamless virtualization integration, workload compatibility, and ease of resource adjustments without performance loss.
Sentiment score
7.8
VMware ESXi is praised for its vertical scalability and management efficiency, despite challenges in horizontal scalability and licensing.
An IBM server can handle up to sixty-four terabytes of RAM.
IT Specialist at Saudi Business Machines - SBM
The product is scalable due to PowerVM's virtualization features, such as shared processor functionality and partition mobility.
Brand Leader at a tech services company with 1,001-5,000 employees
I think IBM PowerVM uses a 'pay as you grow' model, allowing customers to scale their resources as needed.
Solution Sales Specialist at TD SYNNEX
The solution is scalable, allowing us to scale up or down regardless of infrastructure size.
Head IT at Burraq Cyber Security Solutions
vCenter Server can manage up to 1,000 ESXi servers within a single UI interface, allowing extensive deployment and management capabilities.
IT Manager at Synergy Computers
My customers are highly satisfied with its scalability.
Team Lead Virtualization at Hybrid Tech
 

Stability Issues

Sentiment score
8.5
IBM PowerVM is renowned for unmatched reliability and security, outperforming competitors and receiving top ratings for high-performance workloads.
Sentiment score
8.3
VMware ESXi is highly stable and dependable, often rated 8-10, with minimal issues and effective recent updates.
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.
IT Specialist at Saudi Business Machines - SBM
Our clients in India using Power Servers have been running their servers for the last four to five years without any reboot.
Solution Sales Specialist at TD SYNNEX
The product operates reliably, and following IBM’s best practices ensures robust stability.
Brand Leader at a tech services company with 1,001-5,000 employees
ESXi is stable, and our business operations depend on it year after year.
Head IT at Burraq Cyber Security Solutions
Stability rates a perfect 10.
Managing Partner at evercloud
 

Room For Improvement

IBM PowerVM users seek better management, performance, pricing, GUI enhancements, VMware-like integration, and improved cloud strategies and support.
Users are concerned about VMware ESXi's pricing, support, and complexities post-Broadcom, desiring simpler licensing and improvements.
We have a strong relationship with IBM, which aids decision-making in transitioning clients from mainframe to other platforms.
Drirector at a construction company with 201-500 employees
PowerVM should integrate some capabilities of VMware vCenter to improve its management features.
IT Specialist at Saudi Business Machines - SBM
From a product perspective, I would like to see faster certification of open-source products on IBM Power Systems.
Brand Leader at a tech services company with 1,001-5,000 employees
Providing a mobile application for remote access to ESXi servers would be beneficial.
Head IT at Burraq Cyber Security Solutions
It's not cost-effective for small users and creates a gap for alternatives, while favoring larger clients.
IT Manager at Synergy Computers
The cost of VMware ESXi is very high, especially after the acquisition by Broadcom, which led to price increases.
Team Lead Virtualization at Hybrid Tech
 

Setup Cost

IBM PowerVM pricing is high but offers all-inclusive licensing and flexible terms, justifying costs with performance and reliability.
Enterprise evaluators find VMware ESXi pricing high, with complex licensing and costs exceeding competitors, challenging smaller users' budgets.
Pricing is a concern in Argentina due to the higher cost of mainframe solutions.
Drirector at a construction company with 201-500 employees
PowerVM itself is free with the purchase of an IBM server.
IT Specialist at Saudi Business Machines - SBM
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.
Solution Sales Specialist at TD SYNNEX
The product is very cost-effective, though not fixed, as pricing tends to fluctuate over time.
Team Lead Virtualization at Hybrid Tech
The solution is moderately priced, not exactly cheap yet not overly expensive either.
SAP B1 Support Consultant at Abacus Consulting
The pricing is expensive, with the cost for customers ranging from $10,000 to $20,000 yearly.
Head IT at Burraq Cyber Security Solutions
 

Valuable Features

IBM PowerVM provides resource flexibility, stability, security, and cost efficiency, supporting complex workloads and multiple operating systems seamlessly.
VMware ESXi provides cost-effective server consolidation, seamless migrations, high availability, resource optimization, and centralized management with strong compatibility.
Features like partition mobility enhance the machine's capabilities, making it an ideal tool for virtual environments with reliability, availability, and serviceability.
Brand Leader at a tech services company with 1,001-5,000 employees
IBM PowerVM is performing very well in supporting complex workloads.
Service Delivery Manager at a computer software company with 10,001+ employees
PowerVM excels in efficiently managing all systems and environments, including development, UI, and production.
Drirector at a construction company with 201-500 employees
Its capability to move virtual machines to physical machines is very efficient for our live environment.
Head IT at Burraq Cyber Security Solutions
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.
IT Manager at Synergy Computers
vMotion is a daily used technology that allows us to have machines distributed across different sites while maintaining redundancy between the sites.
Managing Partner at evercloud
 

Categories and Ranking

IBM PowerVM
Ranking in Server Virtualization Software
10th
Average Rating
8.6
Reviews Sentiment
6.9
Number of Reviews
38
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
33
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Server Virtualization Software category, the mindshare of IBM PowerVM is 1.4%, up from 1.2% compared to the previous year. The mindshare of VMware ESXi is 2.1%, up from 0.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Server Virtualization Software Market Share Distribution
ProductMarket Share (%)
VMware ESXi2.1%
IBM PowerVM1.4%
Other96.5%
Server Virtualization Software
 

Featured Reviews

reviewer2014950 - PeerSpot reviewer
Service Delivery Manager at a computer software company with 10,001+ employees
Virtualization has simplified partitioning and currently supports secure multi-tenant workloads
The ease of use of IBM PowerVM provides key benefits such as the installation being very easy, and the VIOS is really, really stable. IBM PowerVM is performing very well in supporting complex workloads. It's simple regarding the initial setup for IBM PowerVM. We always create two VIOS servers in IBM PowerVM to be compliant for security and to be compliant also for redundancy.
Ion Boni - PeerSpot reviewer
Managing Partner at evercloud
Has improved daily operations and provides solid performance but recent licensing changes have created challenges
Licensing has become a major issue. The new subscription-based licensing model is problematic. They have dropped all the support services for small partners and cut all small partners. The last two years have been challenging - after building stability, we received an email announcing they dropped the current model. It used to be cost-efficient. Now, when compared with Red Hat OpenStack, it is more expensive, but our knowledge and client awareness is with VMware ESXi. At this moment, we still prefer VMware ESXi.
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Financial Services Firm
11%
Manufacturing Company
8%
Government
6%
Manufacturing Company
16%
Financial Services Firm
10%
Computer Software Company
8%
Government
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business13
Midsize Enterprise5
Large Enterprise21
By reviewers
Company SizeCount
Small Business12
Midsize Enterprise5
Large Enterprise14
 

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?
Licensing has become a major issue. The new subscription-based licensing model is problematic. They have dropped all the support services for small partners and cut all small partners. The last two...
 

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