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CentOS vs Oracle Solaris vs Red Hat Enterprise Linux (RHEL) comparison

 

Comparison Buyer's Guide

Executive Summary

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
5.8
CentOS offers cost savings, operational stability, and efficiency, enhancing web management with strong community and AI support.
Sentiment score
4.6
Oracle Solaris offers high ROI with stability, integration, reduced downtime, performance boosts, and cost benefits, enhancing operational efficiency.
Sentiment score
6.2
RHEL enhances efficiency, reduces costs, ensures stability, and boosts productivity through automation, manageability, and community support.
I have seen a return on investment, particularly in terms of money saved because I do not pay for the servers.
Technical Lead InfraOps at a tech services company with 501-1,000 employees
The money saved was significant, approximately fifteen percent of our IT budget.
Senior Support Engineer at a computer software company with 201-500 employees
It saved a lot of time through troubleshooting, which gives us substantial room for improvement in terms of fixing things.
Senior Technical Support Engineer at a tech vendor with 11-50 employees
In terms of ROI, there have been performance improvements because Oracle Solaris is lighter.
Technology Consultant at Clarinox Technologies Kenya
A long lifecycle is key to having a good return on investment.
Architect at KnowIT
Being able to transform common manual tasks that previously took all day into processes that take an hour, half an hour, or even less, demonstrates clear value.
Systems administrator at a retailer with 501-1,000 employees
Red Hat Enterprise Linux has saved us time and increased productivity.
Cloud engineer at a tech services company with 11-50 employees
 

Customer Service

Sentiment score
5.6
CentOS support relies on community resources and documentation, with Red Hat as a paid alternative for formal assistance.
Sentiment score
4.6
Oracle Solaris support is 24/7, efficient yet sometimes slow, with helpful tools and mixed user ratings on effectiveness.
Sentiment score
7.1
RHEL's support is efficient and knowledgeable, often surpassing competitors, though response times may vary by support agent.
I would rate the customer support for CentOS a 10 on a scale of 1 to 10.
Senior Technical Support Engineer at a tech vendor with 11-50 employees
I've seen many people across the globe interacting, and when users encounter issues, the community provides solutions.
Presales Engineer at Crayon AS
I would rate the documentation about eight in terms of usefulness.
Technical Operations Manager at a wholesaler/distributor with 10,001+ employees
The technical support by Oracle is good.
SR AVP–Presales Cloud & Platform Management Services at Path Infotech ltd
Red Hat Enterprise Linux (RHEL) support is great, as they go beyond their duty to help resolve issues and provide solutions even for third-party software such as XRDP.
Senior Infrastructure Systems Administrator at a healthcare company with 1,001-5,000 employees
When we do contact customer service, they are generally very knowledgeable and well-versed in our size.
Solutions Architect at a healthcare company with 10,001+ employees
Usually, I send the information, and they have something for me within hours, sometimes even minutes.
Team manager at Evertec
 

Scalability Issues

Sentiment score
7.0
CentOS is praised for its scalability, handling large user bases effectively and reliably across diverse IT environments.
Sentiment score
6.1
Oracle Solaris excels in scalable performance, efficiently handling extensive workloads with robust file systems and virtualization, despite hardware dependencies.
Sentiment score
7.2
RHEL excels in scalability, adapting efficiently to diverse needs across platforms while users praise its reliable performance management.
CentOS is scalable and user-friendly without requiring complex configurations.
Presales Engineer at Crayon AS
It allows users to scale resources vertically for upgrading hardware and horizontally by adding more servers, making it suitable for modern web hosting and containerized applications.
IT infrastructure executive at a computer software company with 201-500 employees
CentOS's scalability for my organization has handled growth and changing needs smoothly.
Senior Technical Support Engineer at a tech vendor with 11-50 employees
Regarding vertical scalability, Oracle Solaris is probably one of the most scalable operating systems in the industry.
System specialist at Savecore
Many of our applications scale really well, with some having several hundreds of VMs, which we couldn't accomplish on Windows.
Solutions Architect at a transportation company with 10,001+ employees
Red Hat Enterprise Linux (RHEL) scales very well with the growing needs of our company.
Director, DevOps at Lightedge Solutions
Red Hat Enterprise Linux (RHEL) handles increases in users, applications, or data smoothly, which is why we use it for all our projects, as it provides us with confidence.
Cloud Administrator at a tech vendor with 10,001+ employees
 

Stability Issues

Sentiment score
8.0
CentOS is widely regarded as stable and reliable, often rated highly for its consistent performance and efficiency.
Sentiment score
8.2
Oracle Solaris is highly stable and secure, with rare crashes and minimal disruptions, making it ideal for reliable operations.
Sentiment score
7.8
Red Hat Enterprise Linux is praised for stability, minimal downtime, strong support, efficient patches, and swift bug resolutions.
CentOS is stable, reliable, flexible, and very useful.
IT infrastructure executive at a computer software company with 201-500 employees
CentOS's simplicity and stability make it easy to use.
Presales Engineer at Crayon AS
I believe CentOS is stable, but we are gradually moving away from it.
Technical Operations Manager at a wholesaler/distributor with 10,001+ employees
It works consistently with minimal downtime and very few bugs or glitches.
Senior DevOps Engineer at a financial services firm with 10,001+ employees
It just works, and that's really the key factor; I can't remember the last time we had a system go down and had to restore it due to a bad patch.
Senior software engineer at a financial services firm with 10,001+ employees
We've not had a service outage with Red Hat in six years.
Team Lead, Linux Systems & Tools at a tech vendor with 5,001-10,000 employees
 

Room For Improvement

CentOS users seek better security, user-friendliness, third-party integration, frequent updates, and stability, as it shifts from a stable platform.
Oracle Solaris needs improvements in hardware support, GUI, training, cost reduction, integration, package management, and open-source tool support.
Enhancing RHEL user experience involves improving documentation, setup, security, training, automation, updates, integration, support, and interface.
The documentation and support could be improved, along with compatibility with newer hardware as hardware continually evolves over time.
Presales Engineer at Crayon AS
Kernel parameters, sysctl config details, tuned profiles, process prioritization, optimized disk, and input scheduler choice are all points for performance optimization.
IT infrastructure executive at a computer software company with 201-500 employees
CentOS RADIUS server handles sensitive authentication data, so improving security is the priority.
Technical person at a university with 1,001-5,000 employees
The firewall must be more capable because security is the main concern of every organization and every user.
Head Of IT at a financial services firm with 1,001-5,000 employees
Oracle Solaris needs to improve its compatibility with office tools like Excel.
Technology Consultant at Clarinox Technologies Kenya
Oracle is going to discontinue it, so I do not think any improvement is possible in Oracle Solaris.
SR AVP–Presales Cloud & Platform Management Services at Path Infotech ltd
Addressing these limitations would significantly enhance the operating system's flexibility and efficiency.
Senior DevOps Engineer at a financial services firm with 10,001+ employees
The built-in security features of Red Hat Enterprise Linux were insufficient for our needs, necessitating the implementation of supplementary security measures.
IT Infrastructure Engineer at a manufacturing company with 11-50 employees
By providing pre-installed, native automation tools within the operating system, Red Hat would streamline processes and improve user efficiency.
Systems Engineer at a tech vendor with 501-1,000 employees
 

Setup Cost

CentOS is a cost-effective, open-source operating system favored for its free availability and minimal setup costs.
Enterprise users find Oracle Solaris pricing complex; it's beneficial for performance but costly compared to Linux, with desired pricing improvements.
Red Hat Enterprise Linux's pricing is cost-effective for enterprises needing support, despite free alternatives, with simplified and appealing licensing.
There was no cost in terms of deploying it or getting the license for it.
Senior Technical Support Engineer at a tech vendor with 11-50 employees
CentOS is a free product with free updates.
Technical Operations Manager at a wholesaler/distributor with 10,001+ employees
The enterprise subscription cost is at a certain level, but CentOS saves customers from paying additional money, optimizing costs for enterprises and startups involved in application development.
Presales Engineer at Crayon AS
I find the pricing of Oracle Solaris to be affordable compared to competitors like Windows.
Technology Consultant at Clarinox Technologies Kenya
It may be considered expensive compared to other solutions like CentOS or Ubuntu, which offer some of the same features without additional costs.
Cloud Infrastructure Architect at a healthcare company with 10,001+ employees
Its pricing has room for improvement because it's more expensive in the local market due to purchasing power parity in India.
Cloud engineer at a tech services company with 11-50 employees
Windows Servers base their cost on the number of users and have high licensing fees, while Red Hat Enterprise Linux offers free versions alongside its paid, supported versions.
Senior DevOps Engineer at a financial services firm with 10,001+ employees
 

Valuable Features

CentOS is a stable, secure, and cost-effective platform with excellent compatibility, ideal for enterprises seeking reliability and performance.
Oracle Solaris offers superior virtualization, security, performance, ZFS features, and seamless Oracle integration, praised for stability and reliability.
Red Hat Enterprise Linux offers robust security, flexibility, and comprehensive management, enhancing reliability, scalability, and operational efficiency for organizations.
CentOS has helped me most through its enterprise-level stability.
Technical person at a university with 1,001-5,000 employees
The update cycle changed when CentOS was prioritized for updates, causing stability issues.
Technical Operations Manager at a wholesaler/distributor with 10,001+ employees
In my experience, the best feature that CentOS offers is the network configuration of a device from the command-line interface, which is exceptionally clean.
Senior Technical Support Engineer at a tech vendor with 11-50 employees
The operating system is lightweight, which makes it easier to use on an average computer compared to systems like Windows.
Technology Consultant at Clarinox Technologies Kenya
Additionally, regarding security, you do not have to implement any antivirus software.
SR AVP–Presales Cloud & Platform Management Services at Path Infotech ltd
Oracle introduced a GUI environment with Solaris 11.5.
Head Of IT at a financial services firm with 1,001-5,000 employees
It also has strong security features, is OIS and FIPS certified, and has built-in Linux security configurations.
Cloud Infrastructure Architect at a healthcare company with 10,001+ employees
There is also no downtime.
Linux/DevOps Engineer at Ekwantu Consulting
The operating system allows for the simple addition of kernels, modules, and other applications, making it highly adaptable to various needs.
Technical Lead at a tech vendor with 10,001+ employees
 

Mindshare comparison

As of April 2026, in the Operating Systems (OS) for Business category, the mindshare of CentOS is 4.4%, down from 5.9% compared to the previous year. The mindshare of Oracle Solaris is 2.1%, down from 2.6% compared to the previous year. The mindshare of Red Hat Enterprise Linux (RHEL) is 7.4%, down from 10.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Operating Systems (OS) for Business Mindshare Distribution
ProductMindshare (%)
Red Hat Enterprise Linux (RHEL)7.4%
CentOS4.4%
Oracle Solaris2.1%
Other86.1%
Operating Systems (OS) for Business
 

Featured Reviews

Mohammad Wasif - PeerSpot reviewer
IT infrastructure executive at a computer software company with 201-500 employees
Has supported reliable deployments and simplified issue resolution in complex environments
The most suitable feature of CentOS is its exceptional stability, security, and long-term support, which make it a popular choice for enterprise and server environments. CentOS is widely recognized for providing a stable and secure platform, especially suited for server and mission-critical workloads. Whenever we face critical work, it is easy for our team to handle. For long-term support, each CentOS release generally guarantees long-term updates, ensuring reliability for extended periods. For package management, we use YUM and DNF in the new version for flexible and efficient software management. It depends on our users' requirements for installing CentOS. Licensing for CentOS is above my management details, so I am not aware of this information. CentOS always provides good feedback, is easy to handle, and easy to troubleshoot. The experience with CentOS OS has been very good over the last two months. I rate CentOS nine out of ten.
Shafiq Khan - PeerSpot reviewer
Head Of IT at a financial services firm with 1,001-5,000 employees
Long-term server platform has supported secure banking operations and simplified virtualization
Oracle Solaris is a very good operating system. Most of the time, we do not need to change or replace any configuration. If at any point in time we need to change something, it is really simple and a user-friendly environment. Although it is a CLI, Oracle introduced a GUI environment with Solaris 11.5. Currently, 11.5 has the operating system GUI as well as the CLI. The technical persons working on the operating system most of the time prefer to work on the CLI. It is actually really good and easy to use. As it is a server-level operating system, most of the time you do not need any extra features in the operating system because you are not using the operating system on home machines, desktops, or laptop machines. The extra features are not needed if we are talking about the enterprise level or an official operating system.
RO
Server administrator at Northrop Grumman
Empowers collaboration through streamlined integration and extensive documentation
Improving Red Hat Enterprise Linux (RHEL) can be tough, however, a significant area is collaboration tools. We have many Windows users that use Outlook and Skype or Teams to collaborate on our network. They want Linux desktops due to the fact that they want to use containers. Their biggest complaint is, 'I need two workstations to do my container work and one to collaborate.' If somehow RHEL can start introducing or collaborating with Teams and Outlook so their users can work with their Windows peers, that would be great. But I don't think that's available yet. Regarding pricing, setup costs, and licensing, there needs to be more of an education piece to it. For instance, when purchasing 10 or 100 node licenses, they could suggest, 'We also offer this 1,000 node license instead, and it'll save you specific amounts.' Just more education on their offerings would be helpful, because usually, we're coming out with the requirements, and then they just provide it to us. They could inform us about saving by bundling it differently or using alternative approaches.
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Comparison Review

it_user281973 - PeerSpot reviewer
Storage and VMware Expert at a comms service provider with 1,001-5,000 employees
Aug 24, 2017
It's improved our company's system environments that run Oracle databases.
Red Hat is mission critical to our environment Red Hat has improved the mission critical environments running Oracle databases, while CentOS has improved our web environment and MySQL. Oracle and SAP Environment and all HPC environments. 10 years No issues Very stable i don´t find any problem…
 

Top Industries

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

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business30
Midsize Enterprise22
Large Enterprise28
By reviewers
Company SizeCount
Small Business21
Midsize Enterprise5
Large Enterprise32
By reviewers
Company SizeCount
Small Business90
Midsize Enterprise49
Large Enterprise268
 

Questions from the Community

Which would you choose - RHEL (Red Hat Enterprise Linux) or CentOS?
Red Hat Enterprise Linux is fantastic. It is an inexpensive solution that has excellent security, performance, and st...
What is your experience regarding pricing and costs for CentOS?
I am not entirely sure about the license I purchased for my local machine, but I assume it is the community version, ...
What needs improvement with CentOS?
I do not find anything that can be improved in CentOS. I am a huge fan of it, and there is hardly anything that Linux...
How does Oracle Linux compare with Solaris?
When comparing Oracle Linux and Solaris, I believe that Linux is more secure and more flexible. It is also very suita...
What do you like most about Oracle Solaris?
We use the solution as an internal operating system.
What is your experience regarding pricing and costs for Oracle Solaris?
I find the pricing of Oracle Solaris to be affordable compared to competitors like Windows.
What do you like most about Red Hat Enterprise Linux (RHEL)?
It is open source. We can customize it as per our requirements.
What is your experience regarding pricing and costs for Red Hat Enterprise Linux (RHEL)?
Regarding the pricing of Red Hat Enterprise Linux (RHEL) subscription, I believe the pricing is fair. The support tha...
What needs improvement with Red Hat Enterprise Linux (RHEL)?
I would suggest that Red Hat Enterprise Linux (RHEL) improve the graphical user interface-based experience in a much ...
 

Also Known As

CentOS 7 (x86_64) - with Updates HVM
Solaris 11, Solaris
Red Hat Enterprise Linux, RHEL, Red Hat Enterprise Linux (RHEL) for AWS
 

Overview

 

Sample Customers

Information Not Available
Siemens, IVV
Travel Channel, Mohawk Industries, Hilti, Molecular Health, Exolgan, Hotelplan Group, Emory University, BlueCross BlueShield of North Carolina, HCA Healthcare, Paychex, UPS, Intermountain Healthcare, Brinker International, TransUnion, Union Bank, CA Technologies
Find out what your peers are saying about Red Hat, Rocky Linux, Canonical and others in Operating Systems (OS) for Business. Updated: March 2026.
885,789 professionals have used our research since 2012.