Have minimal impact on SEO and overall page load time. Infrastructure and browser monitoring. Cons: Support could be improved. Has a steep learning curve due to the complex user interface. Log management could be more efficient and user-friendly.

Pros: Server-side service monitoring. Network, process, and host monitoring. Cloud and virtual machine monitoring. Container and infrastructure monitoring. Application security systems.

Digital experience monitoring DEM. Root-cause analysis. Cons: Has a steep learning curve as it has so many features. If you have a big infrastructure, pricing might be costly.

You may receive false alarm notifications from time to time. Pros: Alerting systems. Public dashboards. Integrates with open source and developer tools. Public and private locations. SSL expiry alerting. Cons: Efficient documentation is needed. Only the English language is supported.

Pros: Unlimited data retention. Global testing infrastructure. Full encryption. Testing authenticated pages. Performance budgets. Built-in Google Lighthouse. Insights email report system. Cons: Might be pricey. So few service reviews.

Instant alerts to get notified about any issues. Response time and page speed monitoring. Detailed reports. CPU, RAM, and HDD load to see your server load parameters.

Cons: Alert notifications may be problematic in some channels. Exporting statistics in XML format can sometimes result in a broken layout. You might need to check if you are on the blacklist manually. Pros: Infrastructure and application performance monitoring powered by SolarWinds AppOptics.

Alerting systems. Page speed and transaction monitoring. Unlimited number of sites and users. Shareable reports and performance filtering. Synthetic and real user monitoring. Cons: The root cause might be complex due to the alert system Pricing might be an issue if you also monitor micro-services.

Lacks a mobile app. Pros: Track performance with monitoring, graphs, alerts, and waterfall charts. Possible to analyze your page on mobile devices.

Disable ads on your page to see the performance difference in page load. Analyze pages behind HTTP authentication by passing through credentials. Block or only allow specific resources that load on your page. API functionality. Cons: Test server locations could be increased.

Test results may vary without reason, making them difficult to understand. User interfaces might be confusing. Pros: Ability to see your response times. Possible to set up maintenance windows to prevent alarms during the planned maintenance.

Custom HTTP requests. Multi-location checks. Cons: Not fully open source. The look of the web interface could be improved. Might be a bit hard to set up. Pros: Uptime monitoring from 30 different countries. Page speed monitoring from different locations.

Domain and server monitoring. Cons: The number of locations could be improved. Reporting can be problematic if the filters are incorrectly applied. Free version doesn't have many useful features. Pros: Root cause analysis capabilities.

Synthetic web transaction monitoring. Application performance and server monitoring. Public and private cloud monitoring. Router and firewall monitoring. Cons: The interface might be confusing at first. Technical support could be improved. There could be more features in general.

Pros: Root-cause analysis. Ability to create web and API monitors code-free. Monitors UI and API layers for availability, performance, and functionality. Monitoring multi-step API transactions and verification payloads.

Mobile web apps and API performance monitoring. Cons: Monitoring locations might be problematic, sometimes causing false alerts. Dashboard becomes unavailable from time to time. Customer support could be improved technically.

Pros: Custom dashboards and interactive charts. Ability to get visual confirmation of downtime caused by errors with error snapshots. Custom metrics to collect custom data from the defined step variables for tracking and reporting. Monitor from checkpoints.

Personal private checkpoint running behind the firewall. In concurrent monitoring, the ability to do ten, or more checks from multiple locations at the same time. Off-duty schedules. Cons: The number of server locations could be improved. Set up might not be easy without support. The user interface could be more modern.

User and group management could be more simple. Pros: Infrastructure monitoring. Third-party certified security. Customizable alerting. Topology mapping to see the relationships among elements within a communications network. Customizable reporting system. Customizable and scalable pre-built dashboards.

Server, network, application, storage, and database monitoring. Cons: Has a steep learning curve. Handling the alert management could be more simple. The timeline of screenshots filmstrip is a new feature.

While the page is loading, screenshots are taken when the page updates. You can view exactly how long it takes for your page to fully load with a visual timeline. Uptrends' free Website Speed Test gives you a snapshot of how your desktop or mobile users experience your webpage.

You get everything you need to make smart performance-related decisions about your website and its content. Inspect your Google PageSpeed Insights score, recommended improvements, important page metrics, and page-load progression waterfall report.

First, we spin-up a browser of your choice: Chrome or Edge. As your page loads, the tool tracks every detail along the way. You can see how your website performance compares across different devices and networks from regions all around the world.

You may also catch some misbehaving third-party content providers slowing down your site. With the website speed check, you know the quantity and size of your page elements, the allocation of images, script files, CSS files, HTML files, and the domains the elements come from.

The waterfall report gives you the URL, the load progression, the request and response headers, and the connection details for each element.

You can spot slow-loading elements, failed elements, and bottlenecks within your page, so you know where to apply your efforts to bring your performance budget back under control. Sure, Chrome users make up over 60 percent of the browsing public, but that still leaves millions of people using competing browsers.

Firefox and Edge have roughly 16 percent of the market share for desktop users. Make sure all of your other users have a great experience too. Uptrends always uses the latest browser versions for your website speed tests.

Most other speed-test services use older browser versions. The free website speed check lets you choose from 10 worldwide locations sign up and get access to checkpoints. We locate our checkpoints on the ground in or near the cities where your users live, so you get performance data that mirrors your users' experiences.

You can spot latency problems affecting your users and fix them. You might have the best content, but your mobile speed can drag you down. Everyone loves a fast loading website; in fact, fast loading pages lead to higher conversions, reduced bounce rates, and better user retention.

The speed test tool gives you optimization suggestions you need to focus your efforts and get the best results. Do you need to save your results for later or share them with someone else to see your test results? Use the Share results button and copy a shareable link to your clipboard.

Send test result link to team members using your favorite communication channels. Google ranks your page on its mobile speed, and mobile Internet users have surpassed desktop users. Select the size of the browser window we use for your test and view the resulting load times.

Http request and response headers contain lots of useful information that help you understand specific checks. Make sure to inspect them for slow or not found elements. Uptrends reporting can send you the data you need to spot problem locations and performance trends. Even the most subtle changes within your site or the systems that support it can blow up your efforts to maintain a performant site.

Since it's a newer tool, it has far fewer plugins than JMeter. It currently has This might seem like an odd combination on a website performance tool list. But performance engineering expert Todd DeCapua, in a previous PerfGuild conference session , recommended using Fiddler with Watcher and BlackWidow to create a quick-start automation testing performance solution.

Fiddler enables you to do many things, but it's probably best described as a packet capture tool. While Fiddler may not be considered a load testing solution, it does many things that allow you to debug website issues, and with one of its many extensions, you can accomplish even more.

Watcher is a security add-in for Fiddler, enabling you to get some security results quickly. BlackWidow is a web crawler that gives you the functionality to point it towards a web address and then be able to drill down on results.

For someone just getting started in performance engineering, these three tools working together can provide a great way to get that free look and feel and results that one might not otherwise be able to obtain quickly. It was developed to simplify stress testing and provide a platform that allows you to create, execute, and monitor tests.

The Grinder is a Java-based framework. It provides you with easy-to-run and -create distributed testing solutions using many load generator machines to capture your end-users response times. So you don't have to worry about any virtual user restrictions. Gatling is a stress test tool built on Scala , Akka , and Netty.

It currently has 5. To learn more about Gatling , check out the Founder of Gatling , Stephane Landelle's PerfGuild session on Load Testing Done Right with Gatling. k6 is a developer-centric, open-source load testing tool for testing the performance of your back-end infrastructure. You can also use k6 to start including performance testing in your continuous integration pipelines.

k6 is also a Modern load testing tool built with Go and JavaScript, integrating well into most developers' workflow. Also new for , K6 creates xk6. xk6-browser is an extension for K6, a performance testing tool. It provides browser automation and end-to-end web testing capabilities, allowing you to measure both front-end and back-end performance using a single tool.

xk6-browser offers a unique hybrid approach to performance testing by combining protocol-level tests with browser-level tests, giving you a more comprehensive and realistic view of your web application's performance. xk6-browser currently supports Chromium, with plans to support other browsers in the future.

You can interact with page elements, execute actions, and perform various checks using CSS selectors. The tool also provides browser-specific performance metrics, such as DOM content loaded, first contentful paint, and first meaningful paint.

Tsung is an open-source, multi-protocol distributed load testing too l. It currently has 2. Siege is a command-line HTTP load testing and benchmarking utilit y.

It was designed to help developers measure their code under stress. Developed by the Chicago Tribune, this is probably one of this list's coolest-sounding performance testing tools. Bees with Machine Guns describes itself as a utility for arming creating many bees micro Amazon EC2 instances to attack load test targets web applications.

This load or volume testing tool can quickly help you load test a site to handle high traffic. It currently has 6. LoadRunner tends to be one of the most common enterprise-wide load testing tools, but many of these open-source tools can get you most of the functionality you need. Also, most of these tool protocols can be used for both performance testing web applications and performance testing web services.

Fortio is a cool load testing library, command-line tool, advanced echo server, and web UI in GO golang. This tool allows the specifying of a set query-per-second load and recording latency histograms and other useful stats.

With most modern applications using javascript heavy front-ends, the need for client-side performance measurements has never been greater. You can use Puppeteer WebPerf to collect web performance stats like a trace for a page load, grab a dev tools trace with screenshots, get runtime performance metrics, and a bunch more.

Also, check out my complete front-end performance testing guide for more info. The Flood created this open-source solution to help mimic user behaviors using real browser load testing. Element is an open-source Playwright that uses a browser-based load testing tool. Read about it in my post, Browser Level Performance Testing Using Element.

Contact Us Today. io is an open-source application with an opt-in of premium services to create load tests to simulate load to emulate thousands of user s. I also recently learned that you can use your Playwright test script as performance test integrating with Artillery.

Hear all about it here. FREE TESTGUILD COURSES. These are, in my opinion, the top 15 performance load tester tools for load testing free options. Happy performance testing with these stress testing and load test tools! Are you overwhelmed with staying current with all the latest performance testing tools and best practices?

Listen in to the weekly TestGuild DevOps Toolschain Podcast. Work With Us. Throughput is one of the most misunderstood performance testing concepts new testers sometimes Performance matters, especially if you want to produce quality software.

For this reason, Breathe In, Breathe Out — 4 Step Process We all know that performance It is wise to find and use the right performance monitoring tools to save time and money while making your website function more efficiently, no matter the size of your business.

Synthetic monitoring is a type of active monitoring that uses scripted transactions to simulate real user activity to identify performance issues proactively. Real user monitoring is a passive monitoring technique that captures all user interactions with a website or client communicating with a server or cloud-based application.

Depending on the functions you need and the number of URLs to be checked, the price of website monitoring can range from a few dollars to many thousand dollars. That's why the price changes for each website and package. Website performance testing is the process of testing how quickly and efficiently a website loads and responds to user input.

Pros: Possible to control your monitors from various points around the world. Custom HTTP requests and responses. Custom CSS styling and custom JS. Notifications when the tracked services go up or down.

Ability to create projects to classify your managed resources and projects. Multiple notification handlers. Custom back-half URL.

Possible to block search engine indexing. Cons: The number of integrations could be increased. More features, in general, could be added. Check frequency is high. Ability to see in graph view.

You can see historical data on charts. Comprehensive reporting is provided. Instant alerts are in place. Cons: Reporting could be improved. User interface might be confusing. Pros: Synthetic and real user monitoring. Cloud application and infrastructure monitoring Infrastructure, website uptime monitoring.

Log management. Public website status pages. Cons: The UI may not respond or become slow rarely. Not supported by all languages. Pros: You can examine page views. Provides information about the end user's experience with your apps based on which browser they use. Real user monitoring.

Provides visibility for how long it takes for pages to load in all browsers and reports details for JavaScript errors and AJAX calls. Have minimal impact on SEO and overall page load time. Infrastructure and browser monitoring. Cons: Support could be improved.

Has a steep learning curve due to the complex user interface. Log management could be more efficient and user-friendly.

Pros: Server-side service monitoring. Network, process, and host monitoring. Cloud and virtual machine monitoring. Container and infrastructure monitoring. Application security systems. Digital experience monitoring DEM. Root-cause analysis. Cons: Has a steep learning curve as it has so many features.

If you have a big infrastructure, pricing might be costly. You may receive false alarm notifications from time to time. Pros: Alerting systems. Public dashboards. Integrates with open source and developer tools. Public and private locations. SSL expiry alerting. Cons: Efficient documentation is needed.

Only the English language is supported. Pros: Unlimited data retention. Global testing infrastructure. Full encryption. Testing authenticated pages. Performance budgets.

Built-in Google Lighthouse. Insights email report system. Cons: Might be pricey. So few service reviews. Instant alerts to get notified about any issues. Response time and page speed monitoring. Detailed reports. CPU, RAM, and HDD load to see your server load parameters.

Cons: Alert notifications may be problematic in some channels. Exporting statistics in XML format can sometimes result in a broken layout. You might need to check if you are on the blacklist manually. Pros: Infrastructure and application performance monitoring powered by SolarWinds AppOptics. Alerting systems.

Page speed and transaction monitoring. Unlimited number of sites and users. Shareable reports and performance filtering. Synthetic and real user monitoring. Cons: The root cause might be complex due to the alert system Pricing might be an issue if you also monitor micro-services.

Lacks a mobile app. Pros: Track performance with monitoring, graphs, alerts, and waterfall charts. Possible to analyze your page on mobile devices.

Disable ads on your page to see the performance difference in page load. Analyze pages behind HTTP authentication by passing through credentials. Block or only allow specific resources that load on your page.

API functionality. Cons: Test server locations could be increased. Test results may vary without reason, making them difficult to understand. User interfaces might be confusing. Pros: Ability to see your response times.

Possible to set up maintenance windows to prevent alarms during the planned maintenance. Custom HTTP requests. Multi-location checks. Cons: Not fully open source. The look of the web interface could be improved. Might be a bit hard to set up.

Pros: Uptime monitoring from 30 different countries. Page speed monitoring from different locations. Domain and server monitoring. Cons: The number of locations could be improved. Reporting can be problematic if the filters are incorrectly applied.

Free version doesn't have many useful features. Pros: Root cause analysis capabilities. Synthetic web transaction monitoring. Application performance and server monitoring.