Best Load Testing Software

Load testing software tests software products, websites, and servers by adding load pressure and measuring the response. Development teams use this software as a part of a larger software testing regimen to verify developed products, websites, and servers can handle the various stresses of day-to-day use, as well as high-impact uses (e.g., holiday shopping, enterprise application use, etc.). Load testing tools work well with load balancing software, often being integrated to stress points of impact during testing and then manage those stresses as they occur.

To qualify for inclusion in the Load Testing category, a product must:

  • Stress test software products, websites, and servers
  • Test extreme cases for software, website, and server use
  • Generate reports on strengths and weaknesses revealed during testing
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    SoapUI is the world's most trusted open source API testing tool

    Apache JMeter desktop application is open source software, a 100% pure Java application designed to load test functional behavior and measure performance.

    LoadRunner is the industry-standard software solution for application performance and load testing. LoadRunner emulates hundreds or thousands of concurrent virtual users, with minimal hardware, to apply accurate workloads to any application. As it drives load against the system, LoadRunner captures end-user response times for business processes and transactions to determine whether the application can meet the required service-level agreements. Nonintrusive, real-time performance monitors captures real-time performance data from every component of application infrastructure. After the test completes, the LoadRunner analysis engine provides a single view of end-user response time and infrastructure-level performance to identify the most likely causes of performance issues. Learn more at

    BlazeMeter is a 100% JMeter-compatible, self-service web load testing cloud.

    The easiest to use Web Automation tool on the market, widely used by Enterprise QA’s for testing, but easy enough for anyone. Get automating for WPF, Silverlight, Web, HTML, Angular, React, KUIB, iOS, Android, Mobile Web, and API’s. Test Studio is ideal for a no-code or low-code approach for: QA Test Automation, Application Monitoring, Performance and Load Testing, Web/Marketing Process Automation, and Mobile App Automation.

    WebLOAD is an enterprise scale load testing product that powers the most demanding performance experts in the world. WebLOAD supports hundreds of technologies. DevOps teams will feel right at home with WebLOAD's flexible built-in scripting capabilities.

    NeoLoad is a load testing platform for Cloud-ready apps, microservices architected apps, mobile and IoT apps and enterprise-grade packaged apps

    Automai is a robotic automation platform for BizDevOps teams. Since 2005 Automai was the pioneer in user simulation with robotic technology with their code free engine to intelligently mimic real user activity from the front end. Automai’s Robotic Automation Platform now hosts a suite of automation tools including RPA, Application Performance Monitoring, Functional Testing, and Performance Testing. Our solution is built to streamline the automation needs across your enterprise with one platform: from testing for dev teams, to monitoring for ops teams, to RPA for business teams. Leveraging existing scripts allows teams to work together on each phase with the same business processes. One platform saves time and implementation costs.

    Apica LoadTest is an application testing tool designed to help enterprises ensure the scalability of their websites, apps, APIs and IoT. By testing application performance at varying loads, IT and DevOps teams are able to identify and isolate performance bottlenecks that only rise to the surface during traffic spikes, increasing business efficiency to resolve critical issues before they do real-world damage. 

    Gatling is an open-source load & performance testing tool for web applications. Gatling integrates the DevOps lifecycle and comes with many official and community plugins for other developer tools (like the continuous integration tool Jenkins).

    LoadUI Pro is a tool that allows developers and testers to conduct rapid and comprehensive performance testing for SOAP and REST APIs, test speed and scalability of new changes to APIs in minutes, as well as preview API performance behaviors before releasing to production environments.

    WAPT Pro is a load and performance testing tool that works for any web site from a simple web service to a customized ERP or CRM solution. Mobile web applications, corporate portals and intranet sites implemented with any technologies can be easily tested with WAPT Pro. The test is created in a matter of minutes by recording it in a browser. A few clicks are required to make thousands virtual users concurrently execute duplicated sessions against your site. A convenient user interface lets you design data-driven tests with help of variables and session-specific values extracted from the server responses. This is done explicitly in the properties of each HTTP request. No scripting is required for the test implementation. Descriptive graphs and reports will let you analyze the performance parameters of the system components under various load conditions. You can isolate and fix any bottlenecks and optimize your software and hardware configuration. WAPT Pro is quite efficient and scalable. While the default configuration is sufficient to run up to 4k concurrent virtual users, you can easily extend it by adding multiple servers connected to a single workplace component. This way you can emulate up to 1M users. All components can be used in any virtual or cloud environment. A special edition is provided through the Amazon EC2, where you can use it at hourly price that depends on the test load volume.

    LoadComplete is a desktop tool for load, stress, scalability testing of websites and web applications that works with both traditional HTML web sites and with Rich Internet Applications using modern web technologies like AJAX, ASP.NET, Java, Flash, Flex and Silverlight. The 'record and playpack' and 'visual programming' features enable to create powerful and flexible first load test within a few seconds.

    Testable is an innovative distributed load testing and synthetic monitoring platform. Define a test with a variety of open-source tools and let Testable handle the scale, reporting, and analytics. Supports JMeter, Gatling, Locust, Node.js (including HTTP, websockets,, and,, Selenium Java, Serenity BDD, PhantomJS, SlimerJS, record-and-replay, and HAR files. Load can be generated on our globally distributed AWS infrastructure, on premises using Docker, or by Testable automatically spinning up isolated on demand EC2 instances for each test using our AWS account or yours. Simulate as many virtual users as you can from the test runners without having to pay more. 1 m4.large can often generate 1000+ virtual users depending on the tool. Real-time results include percentiles, success analytics, and trend analysis for every single metric. Want to know how many concurrent users your environment can handle? Define your performance requirements and let Testable automatically figure it out. Track how that number changes across test runs like any other metric. Define your own KPIs and get alerted when a test fails to meet them. Results can be shared and customized to provide different views for different stakeholders. We also integrate with leading monitoring tools like NewRelic and CI solutions to seamlessly integrate load testing and monitoring into your software development lifecycle.

    AgileLoad is an enterprise-class load testing tool with end-to-end performance anomaly diagnostic.

    Flood IO offers distributed load testing with JMeter, Gatling, Selenium or Capybara.

    Cloud API monitoring and load testing tools for websites, apps and APIs.

    Load Impact is an online web load testing service that allows users to run load tests of their web sites directly over the internet.

    Loadium is a JMeter based performance testing tool. You can upload your JMX file, configure test parameters (engine - thread count, iteration, geolocation, network type and more) and run tests. Also, it allows you to compare previous test runs. Moreover, you can integrate your test project with Jenkins, New Relic, Team City as well.

    Loadster is a cloud-hybrid load testing solution for high-performance websites and applications. Load test your sites to find bottlenecks, improve stability, and optimize user experience.

    LoadStorm PRO is cloud-based load testing software for web applications.

    An open source load testing tool.

    megaLOAD is an easy-to-use scalable cloud platform specially created for load testing heavy-duty backend services.

    Simple, smart, and scalable cloud-based load and performance testing for web and mobile apps.

    OctoPerf is a load testing service dedicated to applications & websites developped in HTTP(s) It is based on the open-source load testing reference: JMeter. It allows you to try the robustness of your target over a peak of user traffic. It also highlights its contention points. Important challenges such as the Google ranking or conversion rate optimization depends on these problematics. 3 main OctoPerf's values: - Accessibility: pricing policy as well as physical access. It is a Saas, the service can be reached via Internet through a simple browser without any installation. In addition, we offer competitive pricing adapted to the customer profile. The idea is to democratize the approach to performance testing. To open it for any webmaster because all of them share common stakes. Our prices start at € 39 for the smaller budgets! - Reliability: OctoPerf launches tests in optimal and realistic situations (multi-device, multi-network, multi-geographical simulations) and provides comprehensive and very detailed results. - Modernity: The creation of test scenarios is very simple thanks to a Drag & Drop system. OctoPerf is based in the cloud and usable via a simple and powerful user interface. Try OctoPerf now, simulate thousands of users on your website to ensure it holds the charge.

    PureLoad is a hardware and OS independent load testing tool for internet applications.

    Automate functional and regression testing of web, Windows, and Java applications, and load test web applications. Most testing solutions are dedicated to functional testing or load testing. QA Wizard Pro does both without compromise, so you'll only have to learn one new tool. Use existing functional test scripts, or write completely new ones, to measure web site performance under real-world usage scenarios. Run existing functional test scripts under stressed conditions by limiting network, memory, and disk access.

    QuotiumPRO is software for web load testing, database monitoring, and database optimization. is a performance and load testing tool with enterprise-level features using a familiar jMeter interface. Since its beginning is built as a hybrid performance management tool that runs well on a laptop, in a team, on a private infrastructure or a public cloud. Key reasons to prefer our solution: • excels in on-premises testing where the money is and where new cloud-based solutions are useless • replaces for a fraction of costs expensive obsolete on-premises solutions, that many large corporations bought but seldom really used • runs in a hybrid combined tests from the internal infrastructure and the cloud • is light enough to run on a laptop but robust enough to perform a distributed test from many locations around the world • can simulate users from desktop and mobile devices in one test simultaneously • connects in a modern way to other services with its open API and many 3rd party integrations • automates many tedious tasks otherwise performed manually • brings developers, testers and QA managers together on the same boat, eliminating frictions coming from different testing standards, tools and habits Our clients use to test and tune internal bank core systems, online banking systems, insurance core systems, CRMs, fraud detection systems and other intranets applications. In other use cases is used to manage performance of study and exam system with both internal and online parts.

    StresStimulus is a load testing tool for websites, mobile and enterprise apps.

    UbikLoadPack is a set of commercial plugins for Apache JMeter that is designed to easily load test different protocols.

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