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ReadyAPI Test vs k6 Open Source comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on May 21, 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

k6 Open Source
Ranking in Regression Testing Tools
9th
Average Rating
7.6
Reviews Sentiment
7.9
Number of Reviews
2
Ranking in other categories
Load Testing Tools (7th)
ReadyAPI Test
Ranking in Regression Testing Tools
11th
Average Rating
8.0
Reviews Sentiment
7.0
Number of Reviews
31
Ranking in other categories
Functional Testing Tools (20th), API Testing Tools (11th)
 

Mindshare comparison

As of May 2026, in the Regression Testing Tools category, the mindshare of k6 Open Source is 1.2%, up from 0.4% compared to the previous year. The mindshare of ReadyAPI Test is 3.1%, up from 0.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Regression Testing Tools Mindshare Distribution
ProductMindshare (%)
k6 Open Source1.2%
ReadyAPI Test3.1%
Other95.7%
Regression Testing Tools
 

Featured Reviews

ArtemCheremisin - PeerSpot reviewer
Performance Test Engineer at BETBY
Lighter on the RAM and has native Grafana support
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. Recently, I had a case where I was using another tool, and there wasn't enough memory for it because it required more RAM. k6 Open Source, on the other hand, is lighter and doesn't have a UI, which is beneficial. An engineer I was training could use k6 Open Source scripts even without my help. The tool is more efficient and has native support with Grafana, as both are developed by the same company. This integration enhances monitoring and loss ratio tracking. Thanks to its intelligent GUI, k6 Open Source's design is simpler, particularly for complex scenarios. When we need to manage hundreds of thousands or millions of transactions per minute, the solution becomes a game-changer compared to JMeter.
Luis Sanchez - PeerSpot reviewer
Senior Quality Assurance Test Engineer at Dormakaba
Helps in data, regression, performance, security, and functional testing
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 be beneficial. It needs to improve stability and scalability as well. The tool's support is slow, and takes months to reach a solution.

Quotes from Members

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

Pros

"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."
"The standout feature of k6 is its strong focus on API performance testing."
"We run around 10,000 different validations, including database validations, and we can complete the entire aggregation in less than one hour."
"Using this solution, we developed tests about three times faster than we did with Java and by doing manual REST reverse engineering from product code (Java)."
"We are using SoapUI Pro as an API testing tool, and we do API building, testing, and tracking."
"The solution has some good scanning features."
"We used to write our own solutions, from small scripts to task web services, so this saves us thousands of hours."
"API mockups is a feature that quickly allowed us to have a working API mockup interface during the initial API discussion meetings."
"The most valuable features are that it is user-friendly, it's easy to use and easy to teach to others."
"The out-of-the-box support for the database is a valuable feature."
 

Cons

"One area where k6 could improve is by introducing a GUI similar to JMeter."
"Because we are paying such a huge cost, we expect more hands-on support from their research and development team."
"I am never going to buy SoapUI, far too expensive."
"I would like more documentation, training, tutorials, etc. Also, I don't particularly appreciate that I have to save everything."
"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."
"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."
"The UI could be a bit more flexible."
"Stability has been an issue for us."
"I am not really a fan of the Ready Pro version even though I am sure it offers a lot."
 

Pricing and Cost Advice

Information not available
"I think the number of users is also limited, considering how much we pay."
"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."
"It is free of charge."
"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."
"ReadyAPI Test is expensive, and I rate its pricing a four out of ten."
"My understanding is that the pricing is okay, however, that's taken care of by our procurement team. It's around $5,000 for three years."
"The cost is not that bad."
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Financial Services Firm
11%
Construction Company
8%
Retailer
8%
Financial Services Firm
17%
Computer Software Company
7%
Construction Company
7%
Insurance Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise3
Large Enterprise20
 

Questions from the Community

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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: April 2026.
894,738 professionals have used our research since 2012.