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 57% of users researching this solution on PeerSpot. The top industry researching this solution are professionals from a financial services firm, accounting for 14% of all views.

IBM Z mindshare

As of October 2025, the mindshare of IBM Z in the Mainframes category stands at 38.5%, down from 38.7% compared to the previous year, according to calculations based on PeerSpot user engagement data.

Mainframes Market Share Distribution
Product	Market Share (%)
IBM Z	38.5%
Fujitsu Server GS21	25.2%
Unisys ClearPath Dorado	16.4%
Other	19.900000000000006%

Mainframes

Top industries

By visitors reading reviews

Financial Services Firm

14%

Computer Software Company

13%

University

Manufacturing Company

Educational Organization

Retailer

Media Company

Government

Outsourcing Company

Non Profit

Legal Firm

Healthcare Company

Construction Company

Real Estate/Law Firm

Marketing Services Firm

Program Development Consultancy

Recreational Facilities/Services Company

Renewables & Environment Company

Aerospace/Defense Firm

Logistics Company

Hospitality Company

Comms Service Provider

Consumer Goods Company

Insurance Company

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.