Your site has a breaking point.

Let's find it before your users do. Let's find it before your users do

Don't crash under peak traffic! Load test your web application with thousands of bots to optimize performance, control costs, and prevent downtime.

Load test with real Chrome browsers or automated HTTP clients

Browser Bots control real headless Chrome browsers, for the most realistic load testing possible Automating thousands of real browsers is the ideal way to stress test your web apps and modern websites

Protocol Bots execute scripted HTTP/S requests against your API or static website Testing at the protocol layer is cost-effective and scales to hundreds of thousands of bots

Powerful scripting, on-demand load tests, and actionable results

*Simulate thousands of users hitting your website, web app, or API. Prepare for high-traffic events and reduce the risk of slowness or downtime by load testing ahead of time. Loadster is a cloud-hybrid load testing solution, so you can realistically simulate a massive number of users from 15+ Loadster Cloud regions all around the world, or your own self-hosted hardware. Pro plans include unlimited load tests per month and straightforward pricing. Run your first tests in minutes!

• Rapidly create your test scripts Record load test scripts right in your browser, with the Loadster Recorder extension for Chrome or Firefox
• Just step through your site like a real user would while Loadster records every step into a script
• After recording, play your script back in real time, and edit it if necessary
• It's simple to add custom validation and capture server responses to reuse later in the script
• Not powerful enough for you? Try JavaScript Code Blocks for advanced control flow, looping, and conditionals

Rapidly create your test scripts

Record load test scripts right in your browser, with the Loadster Recorder extension for Chrome or Firefox Just step through your site like a real user would while Loadster records every step into a script After recording, play your script back in real time, and edit it if necessary

It's simple to add custom validation and capture server responses to reuse later in the script Not powerful enough for you? Try JavaScript Code Blocks for advanced control flow, looping, and conditionals

• Launch distributed cloud tests in seconds Configure your test scenario with groups of bots in regions of your choosing, running your scripts, ramping the load up and down, to simulate the geographically distributed traffic you see in the real world
• Loadster's got what you need to run globally distributed cloud tests with minimal setup
• No need to deploy your own instances to run test infrastructure! In about 90 seconds, Loadster can launch tens of thousands of bots across hundreds of cloud instances in regions of your choosing

Launch distributed cloud tests in seconds

Configure your test scenario with groups of bots in regions of your choosing, running your scripts, ramping the load up and down, to simulate the geographically distributed traffic you see in the real world

Loadster's got what you need to run globally distributed cloud tests with minimal setup No need to deploy your own instances to run test infrastructure! In about 90 seconds, Loadster can launch tens of thousands of bots across hundreds of cloud instances in regions of your choosing

• Analyze results with quick reporting While a load test runs, Loadster gives you realtime metrics on response times (average and percentile), network and transaction throughput, errors, and more
• After it finishes, the same data is instantly available in a test report you can hold on to or share with your team
• The metrics and report data inform you how your site handled the traffic, what kind of performance your real users can expect when the site's under a similar amount of load, and where the hot spots and bottlenecks might be

Analyze results with quick reporting

While a load test runs, Loadster gives you realtime metrics on response times (average and percentile), network and transaction throughput, errors, and more

After it finishes, the same data is instantly available in a test report you can hold on to or share with your team

The metrics and report data inform you how your site handled the traffic, what kind of performance your real users can expect when the site's under a similar amount of load, and where the hot spots and bottlenecks might be

Everything you need to move faster with your load testing

• Speedy script recording Record scripts right in your browser with the free Chrome or Firefox extension
• Or add steps manually

Record scripts right in your browser with the free Chrome or Firefox extension Or add steps manually

• Browser-based editing Add steps, edit them, and tweak your script to perfection
• All in your web browser

Add steps, edit them, and tweak your script to perfection All in your web browser

• Rapid script feedback Play scripts from your web browser, and watch in real time as each step runs
• Repeat as necessary! Play scripts from your web browser, and watch in real time as each step runs Repeat as necessary!
• Detailed diagnostics After your script runs, view the full HTTP request and response from every step, both headers and body

After your script runs, view the full HTTP request and response from every step, both headers and body

• Fully managed cloud No need install any infrastructure! Loadster spins up fully managed cloud instances in about 90sec

No need install any infrastructure! Loadster spins up fully managed cloud instances in about 90sec

• Live stream test results As a test runs, watch 10+ charts in real time
• Monitor response times, throughput, errors, and more

Live stream test results

As a test runs, watch 10+ charts in real time Monitor response times, throughput, errors, and more

• Automatic test reports Loadster generates a full test report with charts and tables after every test
• No more manual reporting! Loadster generates a full test report with charts and tables after every test No more manual reporting!