StresStimulus is described as 'Load testing tool for websites and mobile that works with hard-to-test applications'. There are more than 25 alternatives to StresStimulus for a variety of platforms, including Windows, Online / Web-based, Linux, Mac and Self-Hosted solutions. The best alternative is Apache JMeter, which is both free and Open Source. Other great apps like StresStimulus are locust (Free, Open Source), Loader.io (Freemium), Gatling (Free, Open Source) and Loadrunner (Paid).
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.