IBM Z Reviews

Vendor: IBM

5.0 out of 5

1 review
100% willing to recommend

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 52% of users researching this solution on PeerSpot. The top industry researching this solution are professionals from a financial services firm, accounting for 15% of all views.

IBM Z mindshare

As of November 2025, the mindshare of IBM Z in the Mainframes category stands at 37.1%, down from 38.5% compared to the previous year, according to calculations based on PeerSpot user engagement data.

Mainframes Market Share Distribution
Product	Market Share (%)
IBM Z	37.1%
Fujitsu Server GS21	24.3%
Unisys ClearPath Dorado	16.8%
Other	21.799999999999997%

Mainframes

Top industries

By visitors reading reviews

Financial Services Firm

15%

Computer Software Company

11%

Educational Organization

Media Company

Retailer

Manufacturing Company

Government

University

Legal Firm

Non Profit

Outsourcing Company

Marketing Services Firm

Real Estate/Law Firm

Hospitality Company

Healthcare Company

Program Development Consultancy

Recreational Facilities/Services Company

Renewables & Environment Company

Insurance Company

Logistics Company

Consumer Goods Company

Aerospace/Defense Firm

Construction Company

Comms Service Provider

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.