Load Testing determines a system's performance under a specific expected load. This purpose of Load Test is to determine how the application behaves when multiple users access it simultaneously.
Below is a hand-picked list of Best Load Testing Tools. The list contains both open-source(free) and commercial load testing tools(paid) with latest features and download links.
1) WebLOAD
WebLOAD is an enterprise-scale load testing solution capable of generating reliable, real life load scenarios, even for the most complex systems, with smart analytics providing performance insights.
WebLOAD is based on a flexible platform with built in support for hundreds of technologies and integration with many tools from CI/CD pipelines to monitoring.
2) StresStimulus
StresStimulus targets application scenarios that are difficult to test with other tools. It automatically fixes playback errors thanks to its proprietary autocorrelation. StresStimulus records user actions and replays them to emulate variable usage patterns. It also monitors load impact on application responsiveness and server infrastructure. The result analyzer finds hidden concurrency errors left unexposed by functional testing and includes detailed application performance metrics.
3) LoadNinja
LoadNinja by SmartBear allows you to quickly create scriptless sophisticated load tests, reduce testing time by 50%, replace load emulators with real browsers, and get actionable, brower-based metrics, all at ninja speed. You can easily capture client-side interactions, debug in real time, and identify performance problems immediately. LoadNinja empowers teams to increase their test coverage without sacrificing quality by removing the tedious efforts of dynamic correlation, script translation, and script scrubbing. With LoadNinja, engineers, testers and product teams can focus more on building apps that scale and less on building load testing scripts.
4) NeoLoad
NeoLoad is an innovative performance testing platform designed to automate test design, maintenance, and analysis for Agile and DevOps teams. NeoLoad integrates with continuous delivery pipelines to support performance testing across the life cycle - from component to the full system-wide load tests.
5) LoadView
With LoadView by Dotcom-Monitor, you can show actual performance of your applications under load — just as your users experience it. LoadView utilizes real browser-based load testing for websites, web applications, and APIs. Easily create multi-step scripts that simulate users interacting with your website or application using the EveryStep Web Recorder, or even manually edit the script using your own C# code.
6) Apache Jmeter
JMeter is an open source tool that can be used for performance and load testing for analyzing and measuring the performance of a variety of services. It is one of the best load testing tools that is mainly used as website load testing tools for web service applications.
7) HP Performance Tester (LoadRunner)
This is an enterprise performance testing version of Loadrunner and a platform enabled both global standardization and formation Performance CoE.
8) Silk Performer
Silk Performer tool is an enterprise class load and stress testing tool and has the ability to test multiple application environments with the thousands of concurrent users. It is one of the best load testing tools which supports the widest range of protocols.
9) Rational Performance Tester
Rational Performance Tester(RPT) is a performance and load testing tool developed by IBM Corporation. It is performance test creation, execution, and analysis tool that helps development team to validate the scalability and reliability of web based applications before deployment into production.
10) SmartMeter.io
SmartMeter.io is an alternative to JMeter and aims to fix its drawbacks. It is one of the best load testing tools that allows for easy scriptless test scenario creation using the so-called Recorder, yet still lets you make advanced edits of the test. It also excels in test reporting and makes use of functions such as automatic test criteria evaluation, test runs comparison and trend analysis. It fully supports CI/CD integration. Available for Windows, Mac OS, and Linux.