IBM Rational Test Workbench vs Postman Enterprise comparison

IBM and Postman are both solutions in the API Testing Tools category. IBM is ranked #15, while Postman is ranked #1 with an average rating of 8.8. IBM holds a 2.1% mindshare in APIT, compared to Postman’s 9.7% mindshare. Additionally, 100% of IBM users are willing to recommend the solution, compared to 95% of Postman users who would recommend it.

IBM Rational Test Workbench

Read 4 IBM Rational Test Workbench reviews

883 Views
309 Comparison Views

100% willing to recommend

Postman Enterprise

Read 65 Postman Enterprise reviews

4,482 Views
2,958 Comparison Views

95% willing to recommend

IBM Rational Test Workbench

Postman Enterprise

Comparison Buyer's Guide

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Executive SummaryUpdated on Feb 8, 2026

IBM Rational Test Workbench and Postman Enterprise compete in the software testing and automation tools category. Postman Enterprise appears to have the upper hand due to its rich features that many tech buyers find worth the extra cost.

Features: IBM Rational Test Workbench offers strong automated functional testing capabilities, a wide range of enterprise system integrations, and robust test script editing. Postman Enterprise excels with sophisticated API interaction management, collaborative team tools, and extensive API testing capabilities.

Room for Improvement: IBM Rational Test Workbench could benefit from simplifying its enterprise-focused setup and making its deployment process easier. Pricing flexibility could also improve appeal. Postman Enterprise might enhance its service offerings by refining its user interface for even better accessibility, providing more detailed documentation, and expanding integration options beyond APIs.

Ease of Deployment and Customer Service: Postman Enterprise provides flexible deployment options for seamless local or cloud implementation, backed by strong customer service. IBM Rational Test Workbench’s deployment is more complex due to its enterprise focus but is supported by detailed customer support.

Pricing and ROI: IBM Rational Test Workbench operates with a traditional up-front cost structure aimed at long-term enterprise ROI. Postman Enterprise offers scalable pricing aligned with feature-rich offerings that promise faster ROI.

To learn more, read our detailed IBM Rational Test Workbench vs. Postman Enterprise Report (Updated: December 2025).

Buyer's Guide

IBM Rational Test Workbench vs. Postman Enterprise

December 2025

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Helped 881,707 peers since 2012

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

Average Rating

7.6

Reviews Sentiment

7.3

Number of Reviews

Ranking in other categories

Performance Testing Tools (19th), Test Automation Tools (27th)

Postman Enterprise

Ranking in API Testing Tools

1st

Average Rating

8.2

Reviews Sentiment

6.8

Number of Reviews

Ranking in other categories

API Management (7th), API Monitoring Software (1st), AI Software Development (6th)

Mindshare comparison

As of February 2026, in the API Testing Tools category, the mindshare of IBM Rational Test Workbench is 2.1%, up from 0.4% compared to the previous year. The mindshare of Postman Enterprise is 9.7%, down from 12.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.

API Testing Tools Market Share Distribution
Product	Market Share (%)
Postman Enterprise	9.7%
IBM Rational Test Workbench	2.1%
Other	88.2%

API Testing Tools

Featured Reviews

reviewer1513668

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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TOMISLAV SOKAC

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.

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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 product is easy to implement."

"The most valuable feature of Postman is the large libraries."

"The most valuable feature of this solution is Collections."

"The scalability is good."

"It is a scalable solution."

"The most valuable feature of Postman is the verification and testing of APIs."

"The solution collects scenarios and allows for testing SOAP API, REST API and API automation at the same time."

"It is nice to have different workspaces. You have your personal workspace, and then you have a team workspace. In general, I like its UI. It is quite cool."

Cons

"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."

"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."

"The request encryption could be one thing on which they can work a little bit. If we don't want to expose our production data but we still want to test our APIs on the production data, there should be a way to do that. It is not only with Postman. I think no tool in the market is doing that right now."

"I would like to have a code snippet where I can write a code and for the responses of the endpoints to be validated using my custom business conditions."

"I would like to see improvements in the maintenance of the scripts and their collections. It is really painful that the user cannot drag and drop. It was also painful to create the standard suite of operations for the product. I am not sure if this is improved in the tool’s latest versions. The maintenance of the complex scenarios prompted us to use the solution only for unit testing. In the future, we may switch to the k6 framework."

"Integration of the solution towards Bitbucket, BitHub, and CI pipelines is difficult."

"The performance needs to be improved."

"An area that needs some improvement would be to allow multiple windows with different collections to be open at the same time."

"One area that could be better is collection management."

"The solution could be more user-friendly."

Pricing and Cost Advice

"It doesn't really concern me. Licensing is on a yearly basis."

"The pricing is a little bit on the higher side, although it is really good."

"We do not pay any money for Postman."

"The solution is free for individuals, but for companies that use it across the organization, you have to pay per user."

"The solution has a licensing fee which might be prohibitive."

"We are currently using the free version, but we have plans to buy a license."

"The solution is open-source and free."

"Unlike APIs, the solution does not require a license."

"This is an open source solution."

"We use the open-source version. They introduced a new licensing model where your company must subscribe to their services if you're using it for business purposes. However, I think they charge too much if you're only using the basic features. It limits what your organization can do if you're not a paying customer."

More Postman Enterprise pricing and cost advice

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Top Industries

By visitors reading reviews

Financial Services Firm

31%

Manufacturing Company

13%

Non Profit

University

Financial Services Firm

19%

Computer Software Company

14%

Insurance Company

Manufacturing Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

By reviewers
Company Size	Count
Small Business	17
Midsize Enterprise	9
Large Enterprise	41

Questions from the Community

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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...

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What do you like most about Postman?

The product is easy to implement.

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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...

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Katalon Studio vs IBM Rational Test Workbench

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Compared 10% of the time

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Compared 9% of the time

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Compared 8% of the time

Apache JMeter vs Postman Enterprise

Compared 7% of the time

Parasoft SOAtest vs Postman Enterprise

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Product Reports

Buyer's Guide

Performance Testing Tools

February 2026

Download IBM Rational Test Workbench product report

Buyer's Guide

Postman Enterprise

January 2026

Download Postman Enterprise product report

Also Known As

Rational Test Workbench, IBM Rational Performance Tester, IBM Functional Tester, IBM Rational Test Virtualization Server

No data available

Overview

IBM Rational Test Workbench provides a comprehensive test automation solution for mobile applications, regression testing, integration technologies and performance and scalability testing. It helps you build intelligent and interconnected enterprise applications that can be deployed on traditional and cloud infrastructures. With Rational Test Workbench, you can significantly reduce test cycle times, moving integration testing earlier in the development lifecycle.

IBM

Postman Enterprise provides API testing capabilities with features like automation, integration, and shared environments, enhancing efficiency for REST and SOAP APIs. Teams benefit from its intuitive interface and support for automation and scripting.

Postman Enterprise is designed for API testing, supporting REST and SOAP APIs to enhance manual and automated testing. It offers endpoint validation, unit and integration testing, and data-driven testing. This platform is valued for its easy setup, flexibility in automation, and scripting, enabling collaborations through shared collections and generating reports. However, users find room for improvement in automation, integration with platforms, SOAP API testing, and collection management.

What are the key features of Postman Enterprise?

Intuitive Interface: Simplifies navigation and usage across teams.
Automation Capabilities: Speeds up testing processes.
Integration Support: Connects with tools like Jenkins and Newman.
Scripting and Version Control: Enhances collaboration.
Testing Flexibility: Supports REST and SOAP API testing.

What benefits can users expect from Postman Enterprise?

Efficiency Gains: Streamlines API testing processes.
Improved Collaboration: Facilitates teamwork through shared environments.
Better Testing Accuracy: Validates requests and responses thoroughly.

In industries relying on API development, Postman Enterprise aids in creating robust testing environments. Whether technology, finance, or healthcare, teams leverage its data-driven testing capability and collaboration features for comprehensive and accurate testing outcomes.

Postman

Sample Customers

Financial Insurance Management Corp.

PayPal, Shopify, Microsoft, Adobe, Atlassian, Twitter, BestBuy, Coursera

Buyer's Guide

IBM Rational Test Workbench vs. Postman Enterprise

December 2025

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