You can see our main offering from this Summary page:
http://www.e-Valid.com/Services/PerformanceTest/V9/summary.htmlWhat is important is that we use multiple instances of eValid to achieve the loading -- up to 10,000 BU's overall -- and our costs for setup and execution of the experiments are very low.
Note that eValid can do what other test engines can't: AJAX apps are no sweat.
Also, at the end of the runs the customer will own the eValid functional test scripts and LoadTest scripts...so if they wish they can rerun that scenario on their own copies of eValid.
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eValid Tech Support Team