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Sauce Labs 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
Average Rating
7.6
Reviews Sentiment
7.9
Number of Reviews
2
Ranking in other categories
Load Testing Tools (7th), Regression Testing Tools (9th)
Sauce Labs
Average Rating
8.8
Reviews Sentiment
7.2
Number of Reviews
113
Ranking in other categories
Functional Testing Tools (13th), Test Automation Tools (18th)
 

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.
MR
Lead Consultant at a tech services company with 10,001+ employees
Provides multiple test environments and saves time, but should have something for inspecting mobile apps screens
With the desktop browser, we can inspect any screen with the web developer option, but they should provide something for mobiles so that we can quickly inspect elements on the device. To write the Selenium scripts, we require web locators. We have to capture them from the local and execute the script on Sauce Labs. If Sauce Labs can provide a solution where we can inspect any of the mobile devices online, it will be very helpful for us. I also faced an issue where during the execution time, the iCloud password used to expire within a certain period, which used to create pop-ups on the screen making our tests fail. That was one thing that we faced many times. If that can be improved, it will be very helpful.

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."
"There is a huge amount of open source, community provided resources."
"Sauce Lab analytics helped us to get detailed knowledge on test cases execution and logs."
"I never faced any issues with the stability."
"Sauce Connect gave us ability to test an application that was hosted locally."
"Sauce Labs provides us with more combinations to test, so we can keep adding platforms and devices to our network. That's been a very seamless experience. Let's say there's an iOS or a private device we need. Sauce Labs has helped get all those set up when needed."
"It provides a comprehensive selection of browsers and platform versions for our test automations and CI/CD pipeline process. It also provides a comprehensive set of virtual mobile devices, which we can configure for our automation and availability. These features are valuable for us when it comes to testing our applications. We have a website and mobile applications that we want to test and diversify to various browsers and mobile devices as well as restore various versions. This helps us to find bugs that users might be facing and correct them."
"Sauce Labs helps us identify the root causes of bugs. The solution offers a lot of flexibility by providing the latest iOS and Android emulator versions, and even the Appium updates when it comes out in the market."
"The insights section provides a great overall state of the automation suite and can identify trends relatively quickly. If we see a dip in our passing rate over time, we can look at what changed when the test started failing to find the root cause rather than doing a quick fix to find that the test fails a short time later."
 

Cons

"One area where k6 could improve is by introducing a GUI similar to JMeter."
"We have faced challenges with the availability of mobile devices. There was once or twice where there were no mobile devices available."
"It should provide more examples of script code."
"There have been various times throughout the last month or so where the service has gone down during business hours."
"Another feature that could still be improved on is more error clarity. Sometimes when running automated scripts the test will fail on the device side instead of the script and errors only show a 500 try again message instead of a detailed script that could of a been a timeout error from the code."
"Integration with Github, as well as several other similar tools, could be improved."
"When we were in development, it was a bit of a pain because we have onshore and offshore development. One of our development shops is in India, and we were running tests over there. When some of the users tried to log in, it was slow for them or we didn't have enough licenses. That was during the core development before we even launched."
"The Jenkins Sauce OnDemand plugin could have more options available to tap into more of the custom capabilities Sauce Labs actually supports."
"The pricing model of Sauce Labs could be more flexible. Sauce Labs has just one price for the type of solution and a set number of devices. Other solutions have a fee for the base solution and an additional cost per device. If you're a smaller organization, you have to consider your needs. Some smaller companies still need to test various devices, so my advice is to start small and scale up as needed. We had initially planned to start big, but that would have been a big waste."
 

Pricing and Cost Advice

Information not available
"Trial the product and see if it suits your needs."
"We did initially go with Sauce Labs because of the pricing and integration."
"The pricing is reasonable due to the amount of diversity that they provide. However, I feel they might be more flexible to bargain based on their relationship with our organization."
"We pay for a specific number of VMs."
"The pricing is definitely on the higher end, and there are other options that are more cost-effective."
"When you reach the Enterprise licensing tier, base level being with 10 concurrent test sessions, pricing is essentially per-unit-of-concurrency thereafter with a relatively linear increase and not much benefit for "bulk"."
"The number of concurrent VMs that Sauce Labs provides depends on your purchase license level."
"Go ahead please. Try it at a smaller scale."
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
10%
Media Company
7%
Retailer
7%
Financial Services Firm
15%
Computer Software Company
9%
Manufacturing Company
7%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business33
Midsize Enterprise26
Large Enterprise73
 

Questions from the Community

What do you like most about Sauce Labs?
It has significantly enhanced our testing accuracy by approximately 50%.
What needs improvement with Sauce Labs?
Sauce Labs can include new technologies like generative AI, which can reduce the human effort in writing test cases. For example, in my current project, we reduced the time it took to complete user...
What is your primary use case for Sauce Labs?
I work as an automation engineer using Selenium WebDriver with Java, and API automation using Rest Assured with Java. I have also worked with Docker integration on AWS. Additionally, I have experie...
 

Also Known As

Load Impact
No data available
 

Overview

 

Sample Customers

rackspace, salesforce.com, IBM, servicenow, Nasdaq, JWT
Salesforce.com, Mozilla, Zendesk, Puppet Labs, Twitter, Bank of America, Eventbrite, Bleacher Report, Okta, Intuit, Travelocity, Sharecare, CapitalOne.
Find out what your peers are saying about Sauce Labs vs. k6 Open Source and other solutions. Updated: December 2025.
881,114 professionals have used our research since 2012.