ReadyAPI Test vs k6 Open Source comparison

k6 and SmartBear are both solutions in the Regression Testing Tools category. k6 is ranked #10 with an average rating of 7.5, while SmartBear is ranked #9 with an average rating of 7.3. k6 holds a 0.5% mindshare in RTT, compared to SmartBear’s 0.6% mindshare. Additionally, 100% of k6 users are willing to recommend the solution, compared to 93% of SmartBear users who would recommend it.

k6 Open Source

Read 2 k6 Open Source reviews

94 Views
10 Comparison Views

100% willing to recommend

ReadyAPI Test

Read 31 ReadyAPI Test reviews

159 Views
32 Comparison Views

93% willing to recommend

k6 Open Source

ReadyAPI Test

Comparison Buyer's Guide

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Executive SummaryUpdated on May 21, 2025

k6 Open Source and ReadyAPI Test are competing tools in the testing domain. ReadyAPI Test appears to have the upper hand due to its advanced features and comprehensive capabilities, making it suitable for complex testing requirements.

Features: k6 excels in scalable performance testing, easy integration with CI/CD pipelines, and user-friendly interface making it ideal for continuous testing solutions. ReadyAPI Test includes robust API support, data-driven testing capabilities, and extensive functionality for both functional and performance testing.

Ease of Deployment and Customer Service: k6 offers straightforward deployment requiring minimal resources, which enables quick implementation. ReadyAPI Test's deployment is more complex due to its extensive feature set, demanding a steeper learning curve. However, this complexity is mitigated by responsive customer service that assists users during the setup process.

Pricing and ROI: k6 provides a cost-effective solution with a low entry cost, maximizing ROI for organizations with limited budgets. ReadyAPI Test, while having higher initial costs, offers extensive features catering to enterprises that require robust testing solutions. Investing in ReadyAPI Test may be advantageous for businesses seeking a long-term, comprehensive testing framework.

To learn more, read our detailed ReadyAPI Test vs. k6 Open Source Report (Updated: June 2025).

Buyer's Guide

ReadyAPI Test vs. k6 Open Source

June 2025

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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

Ranking in other categories

Load Testing Tools (8th)

ReadyAPI Test

Ranking in Regression Testing Tools

9th

Average Rating

8.0

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

Functional Testing Tools (21st), API Testing Tools (9th)

Mindshare comparison

As of June 2025, in the Regression Testing Tools category, the mindshare of k6 Open Source is 0.5%, up from 0.1% compared to the previous year. The mindshare of ReadyAPI Test is 0.6%, down from 0.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Regression Testing Tools

Featured Reviews

NalinGoonawardana

Principal Consultant ( Test automation - Performance testing) at TTC Global (TTC) at TTC at a tech services company with 51-200 employees

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.

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Luis Sanchez

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.

Read full review

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."

"The out-of-the-box support for the database is a valuable feature."

"The product allows us to uncover any potential issues early on."

"The solution scales well."

"SoapUI is uncomplicated and user-friendly."

"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."

"SoapUI Pro is a good tool when it comes to API design and orchestration. Additionally, it is beneficial for functional and for performance testing."

"It clearly makes it easy to test APIs based on the SOAP protocol. We are a logistics company, and we have lots of tracking calls coming in. We provide APIs for tracking services, and it makes sense for us to use SoapUI to test them thoroughly."

"Using SoapUI's automation suites to run all our test cases saved us a lot of time. Running 300 test cases takes about three to four days. When you automate all that, it takes only two to three hours."

Cons

"One area where k6 could improve is by introducing a GUI similar to JMeter."

"Automation features are not user-friendly."

"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."

"The UI could be a bit more flexible."

"SoapUI Pro is a little heavy due to the number of features. Previously it was not that heavy. Now the tool is too heavy, they should work on fixing this issue because until your system has lots of resources, you won't be able to use it seamlessly. The performance of the application itself could improve."

"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."

"I find that I'm fighting with the opportunities to order requests."

"The documentation needs to be improved because the interface is not easy for a first-time user."

"I would like more documentation, training, tutorials, etc. Also, I don't particularly appreciate that I have to save everything. It takes up a lot of space on my laptop, but I have to install the WSDL again If I don't save it."

Pricing and Cost Advice

Information not available

"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."

"It is free of charge."

"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."

"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."

"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."

More ReadyAPI Test pricing and cost advice

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Top Industries

By visitors reading reviews

Computer Software Company

20%

Manufacturing Company

10%

Financial Services Firm

10%

Media Company

Financial Services Firm

23%

Insurance Company

12%

Computer Software Company

11%

Manufacturing Company

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.

See all answers

What needs improvement with k6 Open Source?

See all answers

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.

See all answers

What do you like most about SoapUI Pro?

The product allows us to uncover any potential issues early on.

See all answers

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.

See all answers

What needs improvement with SoapUI Pro?

See all answers

Comparisons

Tricentis NeoLoad vs k6 Open Source

Compared 51% of the time

Apache JMeter vs k6 Open Source

Compared 15% of the time

Selenium HQ vs k6 Open Source

Compared 15% of the time

BlazeMeter vs k6 Open Source

Compared 12% of the time

Oracle Application Testing Suite vs k6 Open Source

Compared 8% of the time

More k6 Open Source Competitors

Postman vs ReadyAPI Test

Compared 71% of the time

Broadcom Service Virtualization vs ReadyAPI Test

Compared 10% of the time

ReadyAPI vs ReadyAPI Test

Compared 6% of the time

Katalon Studio vs ReadyAPI Test

Compared 5% of the time

IBM Rational Test Workbench vs ReadyAPI Test

Compared 4% of the time

Product Reports

Buyer's Guide

Load Testing Tools

June 2025

Download k6 Open Source product report

Buyer's Guide

ReadyAPI Test

June 2025

Download ReadyAPI Test product report

Also Known As

Load Impact

SoapUI NG Pro

Overview

Load Impact offers three main features:

Automated testing - Integrates into your CD pipeline with CI plug-ins or opt for full control with API/SDKs.
API testing - a powerful scripting environment where you can create as simple or complex API scenarios as you need.
Web & web app testing - easily load test your website or web app. Record user scenarios using our Chrome extension or proxy recorder and configure a test with just a few clicks - no programming required.

For REST, SOAP and other popular API and IoT protocols, SoapUI NG Pro provides the industry's most comprehensive and easy-to-learn functional testing capabilities. Based on open core technology proven by millions of community members, SoapUI NG Pro helps you ensure that your APIs perform as intended, meet your business requirements, timeframes, and team skill sets right from day one.

SmartBear

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

Buyer's Guide

ReadyAPI Test vs. k6 Open Source

June 2025

Free Report: ReadyAPI Test vs. k6 Open Source

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