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IBM Rational Test Workbench vs Loadmill 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:
 

Categories and Ranking

IBM Rational Test Workbench
Ranking in API Testing Tools
15th
Ranking in Test Automation Tools
30th
Average Rating
7.6
Reviews Sentiment
7.3
Number of Reviews
4
Ranking in other categories
Performance Testing Tools (19th)
Loadmill
Ranking in API Testing Tools
20th
Ranking in Test Automation Tools
43rd
Average Rating
0.0
Number of Reviews
0
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of June 2026, in the API Testing Tools category, the mindshare of IBM Rational Test Workbench is 3.2%, up from 0.6% compared to the previous year. The mindshare of Loadmill is 0.8%, up from 0.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
API Testing Tools Mindshare Distribution
ProductMindshare (%)
IBM Rational Test Workbench3.2%
Loadmill0.8%
Other96.0%
API Testing Tools
 

Featured Reviews

reviewer1513668 - PeerSpot reviewer
IT Specialist, ITE at a government with 10,001+ employees
Good reporting and interface, but supports limited types of protocols and requires low-level script editing
It should have more interfaces. In terms of interfaces or protocols, what you can do with Rational is far limited as compared to other products out there. What it does, it does great, but it only gives you limited types of protocols. It supports between 8 to 15 types of protocols, whereas other test tools give you 20 to 30 types of protocols with which you can do testing and convert to script. It records Javascript-based scripts, and you got to know a little bit of Java to basically be able to edit them, but the level of editing you got to do is very low. I like that, but the ability to edit the script is not as good as Parasoft or LoadRunner, which have C-Script.
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Top Industries

By visitors reading reviews
Financial Services Firm
24%
Construction Company
14%
Manufacturing Company
9%
Non Profit
7%
No data available
 

Company Size

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

Also Known As

Rational Test Workbench, IBM Rational Performance Tester, IBM Functional Tester, IBM Rational Test Virtualization Server
No data available
 

Overview

 

Sample Customers

Financial Insurance Management Corp.
Information Not Available
Find out what your peers are saying about Postman, Tricentis, Apache and others in API Testing Tools. Updated: May 2026.
900,125 professionals have used our research since 2012.