SilkPerformer is described as 'Borland - Solutions spanning the application development lifecycle – requirements definition & management, testing and ASQ, change & configuration management, IT project and portfolio management'. There are more than 25 alternatives to SilkPerformer for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Self-Hosted solutions. The best alternative is Apache JMeter, which is both free and Open Source. Other great apps like SilkPerformer are locust (Free, Open Source), Loader.io (Freemium), Gatling (Free, Open Source) and Loadrunner (Paid).
AppPerfect Load Test is a fully automated load test, stress test and performance test solution that helps you design and simulate thousands of users in a realistic manner which can be used to load test your application infrastructure for performance, reliability and scalability.
Neustar Website Load Testing, formerly BrowserMob, uses advanced cloud technology and has a variety of plans to cater to every client - customize a plan that suits your load testing and pricing needs - including our FREE (free trial) test.
step is a comprehensive test automation stack designed to achieve high efficiency in testing pipelines. It is well suited for DevOps delivery. It ships with a distributed execution platform, a collaborative test management system and many plugins.