Try our new research platform with insights from 80,000+ expert users

IBM Z Systems vs Unisys ClearPath Libra comparison

IBM and Unisys are both solutions in the Mainframes category. IBM is ranked #1, while Unisys is ranked #5. IBM holds a 37.8% mindshare in M, compared to Unisys’s 11.4% mindshare. Additionally, 100% of IBM users are willing to recommend the solution, compared to 100% of Unisys users who would recommend it.
IBM Z Systems
Read 1 IBM Z Systems review
  • 563 Views
  • 563 Comparison Views
100% willing to recommend
Unisys ClearPath Libra
Read 1 Unisys ClearPath Libra review
  • 211 Views
  • 211 Comparison Views
100% willing to recommend

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

IBM Z Systems
Ranking in Mainframes
1st
Average Rating
10.0
Number of Reviews
1
Ranking in other categories
No ranking in other categories
Unisys ClearPath Libra
Ranking in Mainframes
5th
Average Rating
9.0
Reviews Sentiment
7.9
Number of Reviews
1
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2025, in the Mainframes category, the mindshare of IBM Z Systems is 37.8%, down from 40.5% compared to the previous year. The mindshare of Unisys ClearPath Libra is 11.4%, up from 7.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Mainframes
 

Featured Reviews

DS
Provides processing of mission critical applications.
Batch DB Online systems. Provides processing of mission critical applications. Ability to handle heavy mixed workloads. More graphical, user-friendly, interface for systems changes. However, IBM is attempting to do this via OSMF.
Read full review
JS
Powerful system, familiar interface, and helpful support
The most valuable feature of Unisys ClearPath Libra is the power of the system. There can be hundreds, maybe even thousands of users using the system at the same time, as well as batch jobs. The ability to look at file structures on the Unisys ClearPath Libra, as if it were a Microsoft Windows file share, has been easy to use for our users and the people in the technology department. The database structure was proprietary software that runs on the Unisys ClearPath Libra on the mainframe. We were able to look at the database and the data within it as if it was a SQL database, and we were able to pull data away with the latest, greatest tools on the Microsoft Windows platform.
Read full review
report
See which vendors are best for you
Use our free recommendation engine to learn which Mainframes solutions are best for your needs.
See recommendations
863,429 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Financial Services Firm
16%
Computer Software Company
15%
University
12%
Educational Organization
6%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Comparisons

Fujitsu Server GS21 vs IBM Z Systems Logo
Fujitsu Server GS21 vs IBM Z Systems
Compared 58% of the time
Unisys ClearPath Dorado vs IBM Z Systems Logo
Unisys ClearPath Dorado vs IBM Z Systems
Compared 19% of the time
IBM LinuxONE vs IBM Z Systems Logo
IBM LinuxONE vs IBM Z Systems
Compared 15% of the time
More IBM Z Systems Competitors
Unisys ClearPath Dorado vs Unisys ClearPath Libra Logo
Unisys ClearPath Dorado vs Unisys ClearPath Libra
Compared 69% of the time
More Unisys ClearPath Libra Competitors
 

Also Known As

No data available
ClearPath Forward Libra 8400 Series, ClearPath Forward Libra 6400 Series
 

Overview

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

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
Information not available
Unisys
 

Sample Customers

Fujitsu
Information Not Available
See our list of best Mainframes vendors.

We monitor all Mainframes reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.