Loader.io - Loader.io is a simple cloud-based load testing service
Blazemeter - BlazeMeter is a self- service performance load testing cloud tool
WebLOAD - WebLOAD - The most flexible and cost effective software for enterprise load, stress and performance testing, integrated with DevOps processes. Click for details
flood.io - Load Testing for Everyone
StresStimulus - Load testing tool for websites and mobile that works with hard-to-test applications.
k6 Cloud - Managed load testing service built on top of the popular open-source project k6.