Top 29 Open Source Load Test Tools

Load test tools, usually referred to as traffic generators, are essential for evaluating the reliability and efficiency of web servers and other applications while dealing with simulated user traffic. By simulating the behavior of several users using the system at once, these tools let administrators and developers assess the system’s responsiveness, stability, and capacity constraints. These technologies provide controlled loads to reveal stress areas, weaknesses, and possible bottlenecks. This allows for proactive optimization to maintain flawless user experiences even during periods of high usage. Employing efficient load test tools has become a must in this changing digital environment to achieve optimum application performance and sustain user happiness.

The complete list of Load Test Tools or we can say traffic generators for evaluating the load on web servers or other applications is provided below:

1. Apache JMeter:

In the list of best load test tools, The popular open-source tool for load testing and performance evaluation is Apache JMeter. It is compatible with several protocols, including HTTP, HTTPS, FTP, TCP, and others.

2. Gatling:

 A load testing tool that is free and open-source and built for high-performance systems. It supports the HTTP, WebSocket, and JMS protocols and is developed in Scala.

3. Tsung:

A distributed load test tool that is open-source and multi-protocol. Protocols including HTTP, WebDAV, SOAP, PostgreSQL, and others are supported.

4. Siege:

A command-line program called Siege is used to load-test web applications. It supports HTTP and HTTPS protocols and may simulate numerous users at once.

5. ApacheBench:

A command-line utility included with the Apache HTTP server is called ApacheBench (ab). It has the ability to send a web server a large number of concurrent requests to gauge its performance.

6. WRK:

A contemporary C-based HTTP benchmarking tool. It supports multithreading and is intended for HTTP server testing.

7. Artillery:

A JavaScript load test tools available for free is called Artillery. The protocols HTTP, WebSocket, and Socket.io are supported, and YAML or JavaScript can be used to construct scenarios.

8. K6:

A load testing tool that is open-source and intended for developers. It offers a CLI for test execution and supports JavaScript and TypeScript scripting.

9. LoadRunner:

LoadRunner is one of the most famous in the list of load test tools. A product sold by Micro Focus. Numerous protocols are supported by it, including HTTP, SAP, Oracle, Citrix, and others.

10. Neoload:

Neoload is a Neotys-produced load test tools. It offers a GUI for test creation and execution and supports a number of protocols, including HTTP, WebSocket, SAP, and Oracle.

11. LoadUI:

SmartBear’s LoadUI is one of the paid load test tools. It offers a visual interface for test development and execution and supports HTTP, SOAP, REST, and other protocols.

12. Flood.io:

A tool for load testing in the cloud that lets you create traffic from several international locations. It is compatible with several protocols, including HTTP, WebSocket, and others.

13. Loadster:

Loadster is a for-profit load test tool that provides both on-premises and cloud-based options. It offers a visual editor for creating tests and supports the HTTP and WebSocket protocols.

14. LoadImpact:

LoadImpact is a load-testing solution that runs in the cloud and lets you use scripts to imitate user behavior. Other protocols, including HTTP and WebSocket, are supported.

15. LoadFocus:

LoadFocus is a load and performance testing tool that runs in the cloud. Other protocols, including HTTP and WebSocket, are supported.

16. Bees with Machine Guns:

Using Amazon Web Services (AWS), the open-source program Bees with Machine Guns simulates a distributed load-testing swarm. Python is the programming language used.

17. Grinder:

Grinder is a Java-based load testing framework that is free to use. Numerous protocols, including HTTP, HTTPS, SOAP, and others, are supported.

18. Siege Hammer:

Ruby-based open-source load testing software called Siege-hammer. In addition to supporting the HTTP protocol, it concentrates on producing high concurrency.

19. Vegeta:

Vegeta is a Go-based, open-source tool for assessing HTTP traffic. It provides distributed load creation and lets you choose request rate and concurrency.

20. Apache Traffic Server:

An open-source caching proxy server called Apache Traffic Server may be used to provide HTTP traffic for load testing.

21. Siege2:

On top of the original Siege program, there is a load testing and benchmarking tool called Siege2. For HTTP load testing, it offers better capabilities and performance.

22. Yandex Tank:

Specifically created for load testing HTTP services, Yandex Tank is an open-source load testing tool. It can create a lot of concurrent traffic and supports several load injection techniques.

23. loader.io:

Use the load testing service offered by loader.io to simulate traffic to your web apps. It offers a simple user interface for setting up and running load tests.

24. LoadNinja:

SmartBear’s LoadNinja is a cloud-based load testing application with scriptless load testing features. It supports several protocols and offers a visual interface for creating load test scenarios.

25. Loadmill:

Loadmill is a platform for cloud-based load testing and API monitoring. It provides script-free load testing and simulates traffic to web applications and APIs.

26. Flood Element:

Using automated browser interactions, the load-testing tool Flood Element focuses on testing online applications. It offers real-user simulation and supports a number of browsers.

27. Taurus:

 A framework for continuous testing that is open-source and automation-friendly. You may create and carry out load tests with ease because to its integration with well-known load testing tools like JMeter, Gatling, and Siege.

28. BlazeMeter:

With the help of BlazeMeter, a platform for load testing in the cloud, you can simulate and create traffic to evaluate the scalability and effectiveness of your web apps, APIs, and other systems.

29. WebLOAD:

WebLOAD is a tool for stress testing, load testing, and performance testing online applications. RadView Software created this load testing and analysis solution for websites and mobile devices. Performance, scalability, and integrity are all combined into one process by the load testing tool WebLOAD for the validation of online and mobile apps.