Best Load Testing Tools for Linux of 2025

Parasoft's mission is to provide automated testing solutions and expertise that empower organizations to expedite delivery of safe and reliable software. A powerful unified C and C++ test automation solution for static analysis, unit testing and structural code coverage, Parasoft C/C++test helps satisfy compliance with industry functional safety and security requirements for embedded software systems.

ZAPTEST is a leading Free and Enterprise software test automation and RPA tool. Computer Vision technology allows cross-platform digital interface automation for UI and API. This combined with our 1SCRIPT methodology, seamless automation, parallel execution, and unlimited licenses, will result in a testing suite that generates up to 10X ROI. ZAPTEST will automate any procedure you can do via any digital interface (live app or mockup). Discover the unparalleled advantages of partnering with ZAPTEST Our partners are essential in providing businesses with innovative, industry-leading automation solutions that transform software testing and RPA processes. ZAPTEST empowers organizations with a unified automation platform that streamlines both software testing and business operations. Our unlimited licensing model ensures you can scale effortlessly, transforming your business into an agile, efficient powerhouse.

RadView WebLOAD is a leading enterprise AI-based performance and load testing solution for testing web, mobile, and packaged applications. It supports over 150 protocols and technologies, including all common front-end frameworks, APIs, message queues, and databases, enabling load testing across any enterprise technology stack. RadView WebLOAD.AI, is available as SaaS and can also be self-hosted in the cloud or on-premise. It is highly scalable and can simulate hundreds of thousands of concurrent users from different locations and cloud platforms. Smart and easy generation of reliable tests and its powerful AI-based analytics capabilities, RadView WebLOAD makes performance teams highly successful in detecting and quickly resolving performance issues. With built-in integration into most of the popular Testing, CI/CD and APM tools, as well as a rich API that makes it easily pluggable into any delivery pipeline. Adding its built-in flexible deployment, it makes RadView WebLOAD easily adaptable into any development, testing, or operation environment, and processes.

Empirix, a global provider of service automation automation that protects brand quality, is an Empirix solution provider. Cloud-native, flexible, open, and cloud-native by design best in class network visibility software and test automation software. Empirix is a trusted name in the field of service providers, equipment manufacturers, and enterprises around the globe. The most reliable and thorough vendor of IP communications services quality in the market They readily accepted Empirix results for solving inter-vendor issues.

Gatling is engineered for organizations that need to test at scale, offering a unified environment for designing, running, and analyzing load tests. It transforms complex performance challenges into clear, actionable insights through powerful metrics, comparisons, and customizable dashboards. Whether you're validating an API, stress testing a cloud migration, or preparing for seasonal traffic spikes, Gatling delivers predictable and repeatable results. Teams can generate millions of virtual users distributed across global or private infrastructure, ensuring realistic test conditions. With seamless integrations into CI/CD pipelines and development workflows, performance testing becomes a natural extension of the delivery cycle. Collaboration is built in, allowing teams to share scripts, coordinate runs, and manage resources together. Gatling also helps organizations follow FinOps principles by optimizing cloud usage during testing. Its flexible approach ensures faster releases, fewer incidents, and far better preparation for high-traffic moments.

Craft, troubleshoot, and evaluate APIs with a human touch rather than a mechanical approach. At last, a workflow that you'll genuinely appreciate. Introducing the Collaborative API Design Tool, which provides a platform for creating, validating, and overseeing OpenAPI specifications. This Desktop API client facilitates interactions with both REST and GraphQL. You can make requests and analyze responses seamlessly. Effortlessly create and organize your requests, set up environment variables, manage authentication, produce code snippets, and much more. Dive deep into response details—explore the entire request timeline, including status codes, body, headers, cookies, and additional information. Organize your project with workspaces, folders, and environments, utilizing a drag-and-drop interface for requests, along with straightforward data import and export options. Within a single collaborative API design editor, you can create, modify, lint, troubleshoot, preview, and manage your OpenAPI specifications. Additionally, generate configurations for popular API gateways such as the Kong API Gateway and Kong for Kubernetes. Synchronize your API designs with version control systems like GitHub or GitLab, and deploy directly to API gateways such as Kong with just a click, streamlining your development process significantly. This tool not only enhances productivity but also fosters collaboration among teams in designing robust APIs.

The most powerful open-source load testing tool for stress and load testing. When you are working with security regulations, get your dedicated IPs from around the world to simulate user loads for your load testing. Your automated Selenium test scripts can be used for performance testing. Instead of using local data centers, create load from other regions to test for load. Amazing reporting features that display tabular and graphical data allow you to monitor app performance during tests. You can now shift left and integrate performance tests into your DevOps process using your favorite CI tool. APM tools can monitor the app infrastructure. Performance Testing is a type software testing that ensures that the application performs well under the user load. Performance testing is not intended to find bugs, but to identify performance bottlenecks. It assesses the system's quality attributes.

Gatling Studio is a desktop application designed to seamlessly transform actual user interactions from web browsers into effective load tests that are executable, leveraging the powerful Gatling engine in a Java/Maven project format within a matter of minutes. It allows users to capture a live browsing session or import a previously recorded HAR file, automatically filtering out unnecessary elements like static files, advertisements, and external trackers, while also enabling customization of the user-flow by domain or request type. This process results in the generation of production-ready Gatling code which can be managed through version control and further developed as needed. Users can then open the generated project in an Integrated Development Environment (IDE), commit it to source control, and tailor it with injection profiles or parameterization, facilitating local execution with Gatling Community Edition or scaling up through Gatling Enterprise Edition. The application is compatible with Windows, macOS, and Linux, and integrates well with Chromium-based browsers, making it ideal for performance engineers, QA teams, and developers who want to streamline test creation while adhering to comprehensive “test-as-code” methodologies. With its user-friendly interface and robust functionality, Gatling Studio significantly enhances the efficiency of load testing processes.

Loadster is a load test platform for websites, web apps, and APIs. Loadster can identify a site's breaking point before you users. To find bottlenecks, improve performance, or prevent crashes, create realistic test scripts.

Keysight Eggplant, part of Keysight Technologies’ software portfolio, redefines quality assurance through intelligent, low-code, and AI-driven test automation. Designed for cross-platform functionality, Eggplant automates functional, regression, and performance testing for desktop, mobile, web, and embedded systems. Its computer vision and machine learning models allow testing from the user’s perspective, detecting visual errors, layout issues, and UX problems that code-based tools often miss. Eggplant integrates natively with leading DevOps tools—including Jenkins, Azure DevOps, and GitHub Actions—to enable continuous testing and accelerate release cycles. Its solutions suite includes Eggplant Test, Eggplant Performance, Eggplant Monitoring, and Keysight Generator, covering the full software lifecycle from test creation to real-time monitoring. The platform’s predictive monitoring identifies performance issues before they impact end users, ensuring consistent uptime and optimized experiences. With measurable results such as 93% reduction in manual testing time and 92% reduction in QA labor hours, Eggplant delivers transformative productivity for modern QA teams. By combining automation, AI, and analytics, Keysight Eggplant empowers organizations to innovate faster and release software with confidence.

Appvance IQ (AIQ), delivers transformative productivity gains and lower costs for both test creation and execution. It offers both AI-driven (fully automated tests) and 3rd-generation codeless scripting for test creation. These scripts are then executed using data-driven functional and performance, app-pen, and API testing -- both for web and mobile apps. AIQ's self healing technology allows you to cover all code with only 10% of the effort required by traditional testing systems. AIQ detects important bugs automatically and with minimal effort. No programming, scripting, logs, or recording are required. AIQ can be easily integrated with your existing DevOps tools, processes, and tools.

PFLB specializes exclusively in performance testing. We help companies identify and resolve performance bottlenecks, such as slow database queries or API calls that are not performing well. We are the company of choice for clients who need performance testing across a wide range of technologies, such as web and mobile applications and core banking systems. We offer a wide range of solutions for JMeter, LoadRunner and other environments. PFLB is a load testing platform that allows companies to perform efficient and scalable performance test. PFLB is a global leader in performance testing with over 15 years' experience.

The Oracle Application Testing Suite offers a complete and cohesive testing solution designed to verify the quality, scalability, and reliability of your web applications and web services alike. With its robust features, it addresses the diverse needs of modern software testing.

An open-source tool for load testing, Locust allows you to define user interactions using Python code and can bombard your system with millions of concurrent users. Forget about cumbersome user interfaces or complex XML configurations—it's all about straightforward coding. This tool also supports distributed load testing across multiple machines, enabling the simulation of vast numbers of simultaneous users. A key aspect of Locust is that you can articulate all your tests directly in Python code, eliminating the need for unwieldy interfaces. Installation is a breeze, as you can simply obtain Locust from PyPI via pip. By leveraging Python for test definitions, users can easily customize and optimize their load tests as needed.