Locust is an open source performance/load testing tool for HTTP and other protocols. Its developer-friendly approach lets you define your tests in regular Python code. Locust tests can be run from command line or using its web-based UI

WebLOAD – Performance and Load Testing for the Most Challenging Web Applications

Supercharge team collaboration by sharing screen capture, logs, and debugging information from local development.

Mock and modify HTTP request for exploratory testing.

Percy is a visual testing and monitoring tool that focuses on detecting visual changes in web applications

Provide your users the experience they expect. Our developer-first observability platform delivers real-time data to improve app performance and help you balance roadmap agility with application stability.