Locust

It is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.

It is a developer centric open source load testing tool for testing the performance of your backend infrastructure. It’s built with Go and JavaScript to integrate well into your development workflow.

Gatling is a highly capable load testing tool. It is designed for ease of use, maintainability and high performance. Out of the box, Gatling comes with excellent support of the HTTP protocol that makes it a tool of choice for load testing any HTTP server. As the core engine is actually protocol agnostic, it is perfectly possible to implement support for other protocols. For example, Gatling currently also ships JMS support.

Run tests across a large selection of physical devices in parallel from various manufacturers with varying hardware, OS versions and form factors.

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

Simulate any user scenario for webapps, websites, mobile apps or web services. 100% Apache JMeter compatible. Scalable from 1 to 1,000,000+ concurrent users.<br>

Build bulletproof, scalable solutions with Blitz - a simple and fun service for load testing web apps and APIs in the cloud. Blitz offers powerful yet simple capabilities including continuous monitoring, performance testing and remediation. Blitz enables you to instantly burst up to 50,000 concurrent users against your app in seconds from multiple points of presence around the world.

Performance testing with Flood increases customer satisfaction and confidence in your production apps and reduces business risk.

It is a load testing platform that brings the low cost power of the cloud to JMeter and other open source load testing tools.

It is  a  cloud-based platform for engineers and performance professionals who load test web applications. It makes load testing simple and fast. Test your website and web apps on real browsers, in the cloud, without the need for dynamic correlation.

It is a modern, open-source, powerful & easy-to-use performance testing toolkit. Use it to ship scalable applications that stay performant & resilient under high load. It prioritizes developer productivity and happiness and follows the “batteries-included” philosophy.

It is a framework for simulating network conditions. It's made specifically to work in testing, CI, and development environments, supporting deterministic tampering with connections, but with support for randomized chaos and customization.

It is a high-performance load testing tool, written in Golang. It is currently supporting HTTP, HTTPS, HTTP/2. Other protocols are on the way.

It is a platform for stress tests that enables you to execute script creation, test execution, monitoring, and result report generator simultaneously. It offers easy ways to conduct stress tests by eliminating inconveniences and providing integrated environments.

It is performance testing platform brings performance testing to the developer’s turf. Developers of all skill levels are able to easily pick up manual testing with it and simply transition to the more modern principles of DevOps and performance testing automation.

It simplifies performance load testing for co-located teams. With project-based capabilities, your teams can quickly identify abnormal application behavior.

It automatically launches and configures containers running on AWS Fargate to help you easily create and simulate thousands of connected users generating a select number of transactions per second without having to provision servers. This solution delivers application performance monitoring, which will help you understand how your application will perform at scale and at expected load, identifying bottlenecks before you release your application.

Upload your JMeter scripts into the platform and execute large-scale load tests from a fully managed cloud network.

Monitor your web resource status, get notifications in real time, load test on your web app, Endpoint Health services and Dynamic DNS You just have to install the storm client on your servers and throw away the access key, you will no longer need the shell, do everything from our dashboard. You can extend the node agent at will by creating customized plugins, or use our constantly evolving archive. You can run any command on your node, receive data, view it in graphs and receive notifications in real time. You can create concatenate commands by creating WORKFLOW without writing a line of code.

It simplifies and scales performance testing for everything, from APIs and microservices to end-to-end application testing. It is designed for the complexities of modern enterprises. It is purpose-built to be flexible and fast, working with complementary testing solutions and toolchains, to enable continuous performance testing.

Its unique developer-first approach to load testing enables your team to rapidly build and deploy performance tests.

It is a performance testing and load testing tool. Totally compatible with JMeter & Gatling. Simple Workflow. Amazing Reporting Features. Cut your cost, reduce business risk and customer satisfaction.

It is an application performance measurement tool reimagined for modern development workflow. Runs on Mac and Windows or you can host it on your Linux server.