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Top 4 Load Testing Tools in 2024

· 4 min read
Avi Stramer

In this blog post we review the latest in the open source load testing scene and come up with a top 4 open-source load testing tools of 2024 list. Read on to see which tools made the cut. Note that this doesn't include functional testing tools like Playwright, Puppeteer, and Selenium which can also be used to run load tests with the help of an orchastration platform like Testable.

1. Apache JMeter

Apache JMeter is a veteran in the load testing arena, beloved for its extensive protocol support and ability to test a myriad of services. Originally designed for testing web applications, it has evolved to accommodate a wide variety of test functions in different domains.


  • Wide Protocol Support: Capable of testing HTTP, HTTPS, websockets, streaming, browsers, FTP, SOAP/REST, and more.
  • GUI Interface: Offers a comprehensive graphical interface, easing the creation, debugging, and visualization of tests.
  • Extensibility: Enhances functionality with plugins, custom samplers, and listeners.

2. Gatling

Gatling caters to the modern web, with its high performance and detailed analytics making it a favorite for testing complex applications. It's particularly suited for developers and testers who prefer code over GUI for defining test scenarios.


  • Scala, Java, and Kotlin DSLs: Utilizes a concise Domain-Specific Language for test script creation, choosing between Scala, Java, and Kotlin.
  • High Performance: Its asynchronous non-blocking engine is designed for efficiency and precision.
  • Detailed Reporting: Generates in-depth reports, offering clear insights into performance metrics.
  • CI/CD Integration: Seamlessly integrates with continuous integration tools, promoting automated testing workflows.


With its user-friendly scripting in Python and scalable nature, is designed for developers who need to mimic user behavior accurately. It stands out for its lightweight framework and the ability to handle massive concurrent users in real-time testing scenarios.


  • Python Scripting: Leverages Python for test case creation, offering extensive flexibility.
  • Real-time Web UI: Monitors test progress and statistics in real-time through a web interface.
  • Efficiency: Designed to be fast and lightweight, minimizing resource consumption.

4. is a modern, powerful tool aimed at the continuous testing era, supporting both HTTP and WebSocket protocols as well as browser testing via Playwright. It's designed for ease of use, with a focus on automating performance testing in CI/CD pipelines and automated infrastructure provisioning on AWS.


  • Mixed Protocol Support: Tests HTTP, WebSocket, and browsers via Playwright.
  • Scriptable: Uses YAML or JavaScript for test scripting, accommodating complex scenarios easily.
  • Integration Friendly: Designed for integration with CI/CD systems, facilitating continuous performance testing.
  • Rich Reporting: Provides detailed performance metrics and supports custom reporting plugins.


The landscape of open-source load testing tools is rich and varied, with options available for every type of application and testing requirement. Whether you need a tool with extensive protocol support like Apache JMeter, the high performance and detailed analytics of Gatling, the scalability and Python scripting capabilities of, or the modern, CI/CD-friendly features of, there's a tool that fits your needs. Each of these tools brings a unique set of strengths to the table, empowering developers and testers to ensure that their applications can withstand the pressures of real-world usage, maintaining optimal performance even under the heaviest loads.

Testable's Cloud Platform can help you distribute and execute tests with JMeter, Gatling, Locust across 100+ regions, multiple cloud providers, and on-premises. It also allows you to reuse functional tests (Puppeteer, Playwright, Selenium) and API tests (Postman) for your load testing. See real-time reporting, analytics, anomoly detection, notifications, integrations and more on a shared web platform for your team to collaborate. Check out our site for more details.