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Load testing tools are a subset of performance testing software, but load testing is one of the most important aspects of overall testing. There is much overlap between the two categories in terms of product coverage. Load testing is the simplest form of performance testing and is designed to test system behavior under expected loads.
This is different from stress testing, which is about overloading systems until they break to understand the outer performance limits. In contrast, load testing ensures a software application or physical network can handle user requests encountered under ordinary operating circumstances.
This activity is typically performed at, or close to, the end of the production cycle so that multi-user load simulations are more accurate. Individual components of an application might also be load tested as part of the development cycle, for example in agile development. However, this is generally referred to as functional testing.
Load testing enables users to evaluate application performance metrics, such as response times, resource-utilization levels, and throughput rates, under ‘normal’ circumstances.
These are features that most load testing tools will have:
Multilocation load testing
Web application testing
API load testing
Database load testing
Mail load testing
Load test performance reporting
Load test plan/script customization
Support for load testing using a range of protocols (e.g. AngularJS, Flash, AJAX, HTML5, JavaScript, SOAP, JSON, WebAPI, WebSockets, etc.)
Many load testing tools are open-source and free to use.
Paid load testing tools are often combined with functional, performance, or stress testing tools, and are presented as a ‘testing platform. These platforms are typically priced on a monthly subscription basis, prices can range from $15 / mo to $175 / mo for more advanced plans. Prices for enterprise level solutions are available upon request.
Selenium is open source software for browser automation, primarily used for functional, load, or performance testing of applications.
JMeter, from Apache, is a load and performance testing tool.
Oracle Application Testing Suite is a comprehensive testing solution, for load, functional and performance testing.
NeoLoad from French company Neotys is a load and performance testing tool.
Micro Focus LoadRunner (formerly HP LoadRunner) is a load and performance testing tool acquired by Micro Focus from Hewlett-Packard Enterprise.
Progress Test Studio aims to be the easiest to use Web Automation tool on the market, widely used by Enterprise QA’s for testing, but easy enough for anyone. The product automates testing for WPF, Silverlight, Web, HTML, Angular, React, KUIB, iOS, Android, Mobile Web, and API’s. Test Studio is ...
SOAtest, from Parasoft headquartered near Los Angeles, California, is a load and performance testing tool.
Micro Focus Performance Center (formerly HP Performance Center) is an application performance and load testing solution acquired by Micro Focus from Hewlett Packard Enterprise.
BlazeMeter is a vendor that provides performance and load testing as a service. BlazeMeter provides a web based interface for creating static load tests and can run any JMeter script for dynamic load tests. One of BlazeMeter's main strengths is that it supplements JMeter (the top open source loa...
SmartBear LoadComplete is a performance, stress and load testing tool for web and Rich Internet Applications, including ASP.NET, Ajax, Flash/Flex and Silverlight.
Rapise is a software testing platform that allows users to regression test web, desktop and mobile applications. Some key features include: Playback of Tests, Test Script Editing and Data Driven Testing.
TestShell from QualiSystems in Santa Clara, California is a test automation platform, for performance and load testing.
Australian company Flood IO offers cloud load and performance testing.
Swedish company Load Impact offers load and performance testing.
WebLOAD from global, Israel-headquartered RadView Software, is an enterprise class load and performance testing tool.
Akamai now owns and supports CloudTest, a load and performance testing solution, developed by SOASTA and acquired with the company in 2017.
StormRunner Load is a SaaS cloud loud and performance testing tool formerly owned and supported by HPE, now supported by Micro Focus.
Load Focus is a cloud testing tool designed to run performance tests and load tests for Web Applications, Websites and API Endpoints with thousands of concurrent users from any world location.
WAPT is a load, stress and performance testing tool for websites and web-based applications. This solution is designed to minimize the learning curve and give the user the ability to create a heavy load from a single regular workstation. The vendor says users can create a basic test scenario and ...
OctoPerf is a load testing tool that is designed to use JMeter in an optimum way. The tool can be used to stress test websites, web apps or mobile apps. The solution enables users to design realistic virtual users without writing a single line of code.
Apica LoadTest, from Swedish software company Apica, is a high-volume load testing tool.
The Parasoft Development Testing Platform offers presents a testing and application lifecycle management solution.
San Jose-based company Appvance offers testing services, including functional, load, application security, and performance testing.
dotcom-monitor in Spring Park, Minnesota offers LoadView, a web load testing and stress test service.
Cavisson’s NetStorm is a performance testing and capacity analysis appliance. It is a load generator that provides an accurate estimation of Client Perceived Response Time (CPRT) enabling IT companies to guarantee Service Level Agreements (SLA). Its technology handles load variables, user realism...