k6

k6, now part of Grafana Labs, is an open-source load testing tool and cloud service aimed at helping engineering teams build and maintain reliable, high-performance applications. The company focuses on providing developers, QA engineers, and SREs with tools to test system resilience, performance, and scalability. Its mission is to empower modern engineering teams to prevent errors and service-level objective (SLO) breaches through proactive testing. k6 specializes in various testing services, including load and performance testing, browser performance testing, synthetic monitoring, chaos and resilience testing, and infrastructure testing. The tool integrates seamlessly with CI/CD pipelines to automate performance testing during development cycles. With a core that is open-source and a growing ecosystem of extensions, k6 supports developer-centric workflows and modern DevOps practices, offering scripting in JavaScript and compatibility with existing tech stacks.