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Industry Software
Founded 2009
Headquarters Boulder, Colorado, U.S.
Products Software Performance testing
Website loader.io

loader.io is a cloud-based load and scalability testing service SaaS that allows developers to test their web applications and API with thousands of concurrent connections.


Loader.io is a cloud-based load testing service[1] for developers to test performance and scalability with their web applications and APIs.[2][3]

It provides simple cloud-based load testing:[4]

  • Load testing for web applications and APIs for performance and scalability[5][3]
  • Integration with PaaS providers, continuous integration tools, and browsers
  • Allows testing up to 50,000 concurrent connections for free[6]
  • It is cloud-based so it is a no install solution and immediately available for developers to test.[3]

It was born out of SendGrid Labs in late 2012.[7]

See also[edit]


  1. ^ "Using loader.io to test the cloud | Chief Hamster - Zeeshan Sheikh". Zxed.net. 2013-04-29. Retrieved 2014-04-15. 
  2. ^ http://zxed.net/2013/05/06/load-testing-checkout-sales-cart-process-with-loader-io/
  3. ^ a b c Hunt, Troy (2014-07-01). "Scaling a standard Azure website to 380k queries per minute of 163M records with loader.io". Retrieved 2014-07-01. 
  4. ^ "Load testing (with loader.io): Find the bottleneck?". concrete5. Retrieved 2014-04-15. 
  5. ^ "What’s Cool for Designers this Week". Crazyleaf. crazyleafdesign.com. Retrieved 16 April 2014.  |first1= missing |last1= in Authors list (help)
  6. ^ Chung, Edward. "Website Design and Testing Tools". Edward-Designer. Retrieved 2014-04-16. 
  7. ^ "loader.io | CrunchBase Profile". Crunchbase.com. Retrieved 2014-04-15.