k6 Cloud - Managed load testing service built on top of the popular open-source project k6.
JMeter - Official Twitter account of JMeter, the open source load testing tool by @TheAsf. Code: https://t.co/ADK2A8Pl14. Website: https://t.co/oc0MW2ksea
OctoPerf - OctoPerf is a SaaS load testing solution, based on JMeter.
SMARTBEAR ReadyAPI - SMARTBEAR ReadyAPI is one of the legit and professional automated testing API platforms that allows teams to create and run automated security tests for APIs and SOAP APIs.
WebLOAD - WebLOAD - The most flexible and cost effective software for enterprise load, stress and performance testing, integrated with DevOps processes. Click for details
Tricentis NeoLoad - Tricentis NeoLoad is an Enterprise Performance Load Testing platform that provides hardware-based performance simulations and can simulate web services, databases, file servers, and virtualized environments.