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ReadyAPI Test vs k6 Open Source 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

k6 Open Source
Ranking in Regression Testing Tools
10th
Average Rating
7.6
Reviews Sentiment
7.9
Number of Reviews
2
Ranking in other categories
Load Testing Tools (9th)
ReadyAPI Test
Ranking in Regression Testing Tools
9th
Average Rating
8.0
Reviews Sentiment
7.0
Number of Reviews
31
Ranking in other categories
Functional Testing Tools (21st), API Testing Tools (10th)
 

Mindshare comparison

As of April 2025, in the Regression Testing Tools category, the mindshare of k6 Open Source is 0.4%, up from 0.1% compared to the previous year. The mindshare of ReadyAPI Test is 0.5%, down from 0.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Regression Testing Tools
 

Featured Reviews

NalinGoonawardana - PeerSpot reviewer
Offers good scalability and has the ability to integrate with various systems and services
One area where k6 could improve is by introducing a GUI similar to JMeter. While k6 is a powerful tool for performance testing, it leans heavily towards coding. Having a GUI, even if it is a low-code approach, could make it more accessible to a broader audience. It would be beneficial to strike a balance where basic tasks can be performed graphically through a user-friendly interface, while still allowing the flexibility for more complex operations through code, similar to how JMeter operates. This could enhance the user experience and make k6 more approachable for those who may not be as comfortable with scripting.
Faiz Ahmed - PeerSpot reviewer
You can achieve any complex task with this tool
There aren't any plugins for UI automation. You need to make a custom code and download a job to put into the libraries. If it were panelized, then it would be straightforward. It should be in a panel of the tools, so you can add those tools as your test step in your test cases. For example, it would be nice to have a Selenium plugin available from the menu, where I can select "open browser" and provide the URL. That URL would be immediately open in the browser. This is like a keyword, and then the Selenium plugin should be there.

Quotes from Members

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

Pros

"The standout feature of k6 is its strong focus on API performance testing."
"The tool's big advantage is that it is more performance-test oriented for experienced testers who know what they are doing. In a normal working setup, performance engineers frequently work with DevOps and development teams. For these teams, k6 Open Source's syntax is much simpler and easier to understand and apply in the working process."
"ReadyAPI has the power to enrich all the technical work. You can achieve any complex task using ReadyAPI. I can also do UI automation with ReadyAPI. In a few test cases, we want to check the API and the equivalent UI. I download a job and write a piece of Groovy or Java code. It's almost the same in ReadyAPI. I can do that in a single test case. ReadyAPI is a powerful tool because you can do anything you want, but only you need to download the right set of jobs and produce the right set of code."
"The out-of-the-box support for the database is a valuable feature."
"SoapUI is uncomplicated and user-friendly."
"It's a very simple solution to use."
"The interface is user-friendly."
"The Pro and free version of SoapUI Pro has good technical support."
"The solution has some good scanning features."
"One good feature is SoapUI's URL check, which allows you to check among the applications. I'm not just talking about the ones for Android. It has all kinds of multi-world tests that are really helpful."
 

Cons

"One area where k6 could improve is by introducing a GUI similar to JMeter."
"The documentation needs to be improved because the interface is not easy for a first-time user."
"The UI could be a bit more flexible."
"It is limited to scope and risk services only. It does have some support for JMS, but it is not out-of-the-box; you have to do some tweaks here and there."
"I find that I'm fighting with the opportunities to order requests."
"We tried automation but it's not easy to integrate with the synching and some of the mission tools that we use for automated testing of APIs."
"SoapUI would benefit from some more customization abilities. It's a good interface, but it would be nice if they added the ability to build custom dashboards where the user can do their own bar graphs and pie charts."
"Grouping of the cases is not possible in SoapUI, to my knowledge. When working with critical cases or the, we were not able to group them properly. We can definitely create a suite and add them there, but within a whole suite, we have to identify them, which was not easy."
"There are no bugs or glitches, but a few features available only in the Pro version could be made available in the open-source version. Some of the features do not necessarily need to be only available to Pro users. The data generator would be really useful for the open-source version users."
 

Pricing and Cost Advice

Information not available
"It is free of charge."
"ReadyAPI Test is expensive, and I rate its pricing a four out of ten."
"The cost is not that bad."
"ReadyAPI Test is about $680 per user, per year."
"The Pro version can be expensive for some companies. There are no costs in addition to the licensing fees."
"I think the number of users is also limited, considering how much we pay."
"SoapUI Pro is open source but it has a subscription-based model which involves some more features. At the moment we are using the free version. The Pro version requires a license, and it is an annual license to use it."
"We have team members who are working in shifts, and it is not possible for us to utilize a single license on a single piece of hardware so that multiple team members can use it. We have to take out multiple licenses for each team member."
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Top Industries

By visitors reading reviews
Computer Software Company
20%
Financial Services Firm
11%
Manufacturing Company
10%
Media Company
8%
Financial Services Firm
25%
Computer Software Company
14%
Insurance Company
11%
Manufacturing Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What do you like most about k6 Open Source?
The standout feature of k6 is its strong focus on API performance testing.
What needs improvement with k6 Open Source?
One area where k6 could improve is by introducing a GUI similar to JMeter. While k6 is a powerful tool for performance testing, it leans heavily towards coding. Having a GUI, even if it is a low-co...
What is your primary use case for k6 Open Source?
k6 Open Source is a powerful tool, especially for API-level performance testing. Its integration capabilities and ease of use make it promising for a wider audience.
What do you like most about SoapUI Pro?
The product allows us to uncover any potential issues early on.
What is your experience regarding pricing and costs for SoapUI Pro?
ReadyAPI Test is expensive, and I rate its pricing a four out of ten.
What needs improvement with SoapUI Pro?
ReadyAPI Test needs to improve its reporting. While reports provide essential information when issues arise, or tests fail, having more graphical representations directly within the reports would b...
 

Also Known As

Load Impact
SoapUI NG Pro
 

Overview

 

Sample Customers

rackspace, salesforce.com, IBM, servicenow, Nasdaq, JWT
Apple, Cisco, FedEx, eBay, Microsoft, MasterCard, Pfizer, Nike, Oracle, Volvo, Lufthansa, Disney, HP, Intel, U.S. Air Force, Schindler
Find out what your peers are saying about ReadyAPI Test vs. k6 Open Source and other solutions. Updated: March 2025.
846,617 professionals have used our research since 2012.