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

IBM Rational Test Workbench vs Postman Enterprise comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 2, 2025

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
14th
Average Rating
7.6
Reviews Sentiment
7.3
Number of Reviews
4
Ranking in other categories
Performance Testing Tools (18th), Test Automation Tools (31st)
Postman Enterprise
Ranking in API Testing Tools
1st
Average Rating
8.2
Reviews Sentiment
6.8
Number of Reviews
65
Ranking in other categories
API Management (8th), API Monitoring Software (1st), AI Software Development (6th)
 

Mindshare comparison

As of January 2026, in the API Testing Tools category, the mindshare of IBM Rational Test Workbench is 1.8%, up from 0.4% compared to the previous year. The mindshare of Postman Enterprise is 9.8%, down from 13.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
API Testing Tools Market Share Distribution
ProductMarket Share (%)
Postman Enterprise9.8%
IBM Rational Test Workbench1.8%
Other88.4%
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.
TS
API Integration Engineer at Airbnb
Automated testing optimizes API workflow and collaboration
Since I am using the free tier, one improvement would be to increase the number of requests you can send in a short time period. Currently, if I send 200-300 requests in a short period, Postman Enterprise requires a 30-second wait before sending another bundle of requests unless you upgrade to a higher tier. Secondly, Postman Enterprise sometimes takes several minutes to load the whole workspace. With 2,000-3,000 requests in a workspace, it can take a minute or two to load all requests. When creating a new workspace and moving requests between workspaces, depending on internet speed, it can take a longer period to copy those requests or workspace from one place to another.

Quotes from Members

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

Pros

"This solution provides for API testing, functional UI testing, performance testing, and service virtualization."
"Reporting is pretty good. Its interface is also good. I'm overall pretty happy with the functionality and use of IBM Rational Test Workbench."
"The API testing features are valuable."
"Postman is open-source and free to use."
"The most valuable features of the solution are that it is easy to use and user-friendly."
"It is a very stable solution."
"Overall rating: Ten out of ten."
"One of the most valuable aspects of Postman is scalability. We can scale the collection and for the multiple repositories of the collections."
"Postman is very user-friendly and accessible even for those with minimal experience."
"Simple to use and you can easily store your projects."
 

Cons

"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."
"There are a number of things that they can do to simplify the tools, but the most important thing that they need to do is simplify the installation."
"Postman could be improved by providing options for performance testing of APIs."
"If there is any way to have a record and playback feature through UI, as we do in Selenium and IDEs such as Eclipse, it would be great."
"Postman quality assurance could improve when doing tests."
"I have display issues in my Windows that need to be fixed."
"Initially, the setup is a little bit complex"
"If we have a certain build on one machine it won't work with another build even if we are using the same URL. It would give us a connection refuse. So developing environment compatibility would make it better."
"Postman is a bit more of a complex tool, making it an area where improvements can be made."
"The tool needs to have a reporting feature."
 

Pricing and Cost Advice

"The pricing is a little bit on the higher side, although it is really good."
"It doesn't really concern me. Licensing is on a yearly basis."
"This tool is open-source and free to download and use."
"We do not pay any money for Postman."
"The solution's price is reasonable."
"Postman is a free service."
"The solution has moderate pricing."
"We are currently using the free version, but we have plans to buy a license."
"The solution has a licensing fee which might be prohibitive."
"The solution is open-source and free."
report
Use our free recommendation engine to learn which API Testing Tools solutions are best for your needs.
881,082 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Financial Services Firm
31%
Manufacturing Company
13%
Non Profit
9%
University
7%
Financial Services Firm
19%
Computer Software Company
14%
Insurance Company
8%
Manufacturing Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business17
Midsize Enterprise9
Large Enterprise41
 

Questions from the Community

Ask a question
Earn 20 points
How does Postman compare with Apache JMeter?
Postman lets you easily define variables, which then get updated automatically. This is a huge time-saver and makes processes very efficient. We can also export the test cases we create and share t...
What do you like most about Postman?
The product is easy to implement.
What is your experience regarding pricing and costs for Postman?
Postman is much cheaper than the other tools. I am not aware of the current pricing for Postman because that's taken care of by the client; we just pay and they simply create options. On a per-pers...
 

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.
PayPal, Shopify, Microsoft, Adobe, Atlassian, Twitter, BestBuy, Coursera
Find out what your peers are saying about IBM Rational Test Workbench vs. Postman Enterprise and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.