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ReadyAPI Performance vs StresStimulus comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jan 6, 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

ReadyAPI Performance
Ranking in Performance Testing Tools
10th
Ranking in Load Testing Tools
10th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
8
Ranking in other categories
No ranking in other categories
StresStimulus
Ranking in Performance Testing Tools
9th
Ranking in Load Testing Tools
9th
Average Rating
8.0
Reviews Sentiment
7.9
Number of Reviews
3
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of May 2026, in the Performance Testing Tools category, the mindshare of ReadyAPI Performance is 2.8%, up from 1.5% compared to the previous year. The mindshare of StresStimulus is 2.3%, up from 1.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Performance Testing Tools Mindshare Distribution
ProductMindshare (%)
StresStimulus2.3%
ReadyAPI Performance2.8%
Other94.9%
Performance Testing Tools
 

Featured Reviews

Mahendra Andhale - PeerSpot reviewer
Test Manager at Happiest Minds Technologies
Open-source and flexible but needs client-side scripting
It's an open-source tool and supports a lot of plugins and custom code, which allows integration with other tools like Azure and AWS. Also, the APIs tested with SoapUI can be directly used, avoiding the need to create collections like in Postman. The client-side scripting, if incorporated, would provide a complete solution for performance tests. It can handle user distribution and transaction throughput distribution effectively.
reviewer1924179 - PeerSpot reviewer
Customer Service Agent at Capita
Reliable with excellent support but needs better source control integration and versioning
Source control integration and versioning could be better. Currently, StresStimulus does not natively support any form of change control management. Result analysis (snap-out tabs for side-by-side comparisons) need improvement. Multiple sets of analysis results can be opened in the user interface at the same time, and comparison reports can be generated to compare some aspects of pairs of test runs. However, the interface that displays the multiple sets of results only allows a single result set to be viewed at any one time & uses tabs to switch between the individual result sets. It would be useful to have the ability to view multiple tabs at once, either side by side in the interface or by snapping tabs out of the interface into their own windows to be viewed together with others. Graphing (collect PerfMon data as part of the tests and then have the ability to create different graphs with that data after the test completes to help with analysis) could be better. Graphs and their contents have to be defined before tests are run. Often, as a result of running tests and viewing the results collected, it is necessary to have graphs showing/comparing different metrics collections than those specified before the run. Other tools collect metrics that are not tied to pre-defined graphs & allow the metrics to be used to construct graphs as required by subsequent analysis & investigation. Nested tests/test case groups/test solution files (ability to build a hierarchy of test cases/test case groups/solution files) are required. Within a StresStimulus, tests are organized in just two levels, test cases, and test case groups. As is possible with other tools, it would be helpful to have a hierarchy with multiple levels of nested test cases/test case groups (or even the solution config files themselves). It would make it easier to manage multiple sets, combinations of tests, load profiles & test mixes if a high-level solution file (or test case group) could run a collection of lower-level ones, which in turn end up executing multiple different base-level test case groups and individual test cases.

Quotes from Members

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

Pros

"The performance and reporting of this solution have been its most valuable features."
"We can scale."
"The performance and reporting of this solution have been its most valuable features."
"We find the product to be scalable."
"It is a very good and handy product, there are so many features, and it is getting more popular day by day."
"It has helped improve productivity and functionality."
"ReadyAPI automation can help us validate the functionality of most web services, allowing us to find out the exact number of defects before deployment to the user interface."
"It's like a centralized interface that allows us to increase the quality of our APIs."
"Technical support is great."
"Designed to be a modern testing tool, StresStimulus made it easy for us to upgrade from an older deprecated testing tool and adapt to Agile DevOps testing principles by shifting left with performance testing."
"Technical support is great."
"Compared to other tools, there is not a whole lot to Stress Stimulus UI. This makes it easy to use, be it while scripting, executing, or having to train someone new to the team."
 

Cons

"I want the solution to be able to monitor Apache Kafka activity as well."
"The solution’s interface could be improved."
"The client-side scripting mostly isn't needed for performance testing, however, if implemented, it would enhance the tool."
"This is an area for improvement with the tool. We unnecessarily use JMeter for some website testing, which we would like to avoid by introducing this tool for API and load testing because it provides load testing features."
"This solution could be improved by offering artificial AI testing in addition to API testing. For example, we would like to have machine learning testing because when test applications, manual work could be completed automatically using this functionality."
"I'm not sure if they have the same level of documentation for performance and security testing."
"I'd not sure if they have the same level of documentation for performance and security testing."
"The client-side scripting mostly isn't needed for performance testing, however, if implemented, it would enhance the tool."
"We run tests on SQL statements and stored procedures directly, even before integrating with UI. I wish there were a way to connect to my application DB and run SQL queries using a JDBC connection."
"Analyzing results from test runs is proving to be challenging."
"StresStimulus has a dedicated blog where users of the tool can log new feature requests or enhancements to existing features."
"Result analysis (snap-out tabs for side-by-side comparisons) need improvement."
 

Pricing and Cost Advice

"This solution operates on a licence basis and the usage and cost varies according to the use case. It is more expensive if you include access to the learning center. On average it costs approximately 800 Euros."
"We find the cost to be affordable."
"ReadyAPI Performance’s pricing is reasonable."
Information not available
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Top Industries

By visitors reading reviews
Financial Services Firm
16%
Media Company
10%
Retailer
10%
Performing Arts
8%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business2
Midsize Enterprise1
Large Enterprise5
No data available
 

Questions from the Community

What is your experience regarding pricing and costs for ReadyAPI Performance?
Load UI is mostly free, and the pricing for the pro version is very affordable compared to other tools like LoadRunner.
What needs improvement with ReadyAPI Performance?
The client-side scripting mostly isn't needed for performance testing, however, if implemented, it would enhance the tool.
What is your primary use case for ReadyAPI Performance?
The primary use case is to conduct server-side performance tests, scalability tests, and endurance tests using SoapUI and Load UI.
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Also Known As

LoadUI NG Pro
No data available
 

Overview

 

Sample Customers

Mercedes-Benz, Adobe, Hilton Hotels, The Home Depot
Information Not Available
Find out what your peers are saying about ReadyAPI Performance vs. StresStimulus and other solutions. Updated: April 2026.
893,164 professionals have used our research since 2012.