IBM Z Reviews

Name: IBM Z
Brand: IBM
Rating: 5.0 (1 reviews)

Vendor: IBM

5.0 out of 5

1 review
100% willing to recommend

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What is IBM Z?

IBM Z mainframes deliver millisecond response time, extreme reliability, near 100% uptime and the world’s best security.

IBM Z is the #1 ranked solution in top Mainframes. PeerSpot users give IBM Z an average rating of 10.0 out of 10. IBM Z is most commonly compared to Fujitsu Server GS21: IBM Z vs Fujitsu Server GS21. IBM Z is popular among the large enterprise segment, accounting for 54% of users researching this solution on PeerSpot. The top industry researching this solution are professionals from a financial services firm, accounting for 13% of all views.

IBM Z mindshare

As of March 2026, the mindshare of IBM Z in the Mainframes category stands at 33.6%, down from 39.2% compared to the previous year, according to calculations based on PeerSpot user engagement data.

Mainframes Mindshare Distribution
Product	Mindshare (%)
IBM Z	33.6%
Fujitsu Server GS21	20.3%
Unisys ClearPath Dorado	19.4%
Other	26.69999999999999%

Mainframes

Key learnings from peers

Last updated Mar 26, 2026

Valuable Features

"Provides processing of mission critical applications."

Room for Improvement

"More graphical, user-friendly, interface for systems changes."

These insights are based on the in-depth reviews provided by peers to help you make a better buying decision.

Top industries

By visitors reading reviews

Financial Services Firm

13%

Government

11%

Computer Software Company

Media Company

University

Educational Organization

Manufacturing Company

Retailer

Legal Firm

Non Profit

Real Estate/Law Firm

Outsourcing Company

Healthcare Company

Hospitality Company

Recreational Facilities/Services Company

Renewables & Environment Company

Construction Company

Insurance Company

Logistics Company

Consumer Goods Company

Energy/Utilities Company

Performing Arts

Program Development Consultancy

Compare IBM Z with alternative products

Learn more about IBM Z

The newest mainframe, IBM z14 (z14), is designed for trusted digital experiences. This enterprise system delivers pervasive encryption, stronger clouds, real time insights, machine learning and transparent blockchain.

IBM Z customers

Fujitsu

Product Categories

Mainframes

Popular Comparisons

Fujitsu Server GS21 vs IBM Z

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IBM Z Reviews Summary
Author info	Rating	Review Summary
Manager CICS Support at Blue Cross Blue Shield of Illinois	5.0	I found this system excellent for batch DB online use, processing mission-critical apps. Its ability to handle heavy mixed workloads is valuable. I'd like a more graphical UI for system changes, though IBM is addressing it via OSMF.