Loader.io is a free load testing service that allows you to stress test your web-apps & apis with thousands of concurrent connections.

Hosted System Status Pages Fully customizable, featuring incident tracking, subscriber notifications, and much more

Gatling is a powerful open-source load testing solution that integrates with your development pipeline. It includes a web recorder and colorful reports.

Website and mobile testing at every stage of development

Status, performance and uptime monitoring for cron jobs, websites, APIs and more.

Orderly Ape is an open source (MIT) tool to run distributed and scalable k6 load tests on your own infrastructure using k6, kubernetes, grafana and influxdb.