Sitespeed.io is an open source tool that helps to analyze and optimize website speed and performance.
Current Customer(s)
Market Share (Est.)
Ranking
The top three of Sitespeed’s competitors in the Performance And Load Testing category are Apache JMeter with 55.59%, LambdaTest with 6.60%, The Grinder with 3.94% market share.
Popular Comparisons
The top three of Sitespeed’s competitors in the Performance And Load Testing category are Apache JMeter with 55.59%, LambdaTest with 6.60%, The Grinder with 3.94% market share.
Sitespeed vs Apache JMeter
Sitespeed vs LambdaTest
Sitespeed vs The Grinder
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Sitespeed vs eggPlant Test Automation Suite
Sitespeed vs Tricentis Neoload
Sitespeed vs WebLOAD
Sitespeed vs Blitz
Around the world in 2026, over 126 companies have started using Sitespeed as Performance And Load Testing tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Specsavers | 10,000+ | London | England | United Kingdom | |
| Shutterstock | 10,000+ | New York City | New York | United States | |
| Zalando | 10,000+ | Berlin | Berlin | Germany | |
| RS | 10,000+ | London | England | United Kingdom | |
| Walgreens | 10,000+ | Deerfield | Illinois | United States | |
| Club Med | 10,000+ | Rio de Janeiro | Rio de Janeiro | Brazil | |
| Turbify | 10,000+ | Rockville | Maryland | United States | |
| Kantar | 10,000+ | London | England | United Kingdom | |
| Lowe's Companies, Inc. | 10,000+ | Mooresville | North Carolina | United States | |
| EPAM Systems | 10,000+ | Newtown | Pennsylvania | United States |
The top three products and services offering customers that use Sitespeed for Performance And Load Testing are Cloud Services (9), Digital Transformation (7), Web Development (6).
Customers
The majority of Sitespeed's customers for the performance-and-load-testing category fall in the company size of 10,000+ employees (47 companies), 100 - 249 employees (16 companies), 1,000 - 4,999 employees (15 companies).
Employee Size
The top three geographies of Sitespeed for performance-and-load-testing are the United States with 45(43.27%), United Kingdom with 15(14.42%), France with 11(10.58%) customers respectively.
Customers
Find answers to the most often asked questions by users.
Who are the top Sitespeed competitors?
Sitespeed’s Top competitors in the performance-and-load-testing category are Apache JMeter, LambdaTest, The Grinder. You can view a full list of Sitespeed competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of Sitespeed and 40,000 other technologies on the internet. You can also compare Sitespeed and its feature with top competitors here : Sitespeed vs Apache JMeter Sitespeed vs LambdaTest Sitespeed vs The Grinder.
What is Sitespeed customer distribution based on company size?
What is Sitespeed market share in the performance-and-load-testing?
What are the top countries that use Sitespeed?
What are the top industries that use Sitespeed?
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