Your site has a breaking point.
Let's find it before your users do.
Don't crash under heavy traffic! Load test your web application with thousands of bots to optimize performance, control costs, and prevent downtime.Start testing for free
Load test with real Chrome browsers or scripted 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
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.
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.
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.
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!
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.
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!
Anyone on your team can create scripts, run tests, and share results. Make scalability a team effort!
Test from 24 global cloud regions or your own self-hosted engines
Loadster can launch thousands of bots from your choice of AWS and GCP cloud regions in about two minutes, or you can self-host your engines with Docker to test privately hosted applications.
Flexible pricing to fit the way you test
Pay As You Go
Starting at $97 for 1000 units
Buy Loadster Fuel and run load tests in any of 24 cloud regions. No commitment. Simply purchase more fuel when you run out!View Loadster Fuel Pricing
Starting at $78 a month
Automatically add fuel every month at a discount. Fuel plans are the best long-term value, even if you might not load test every month.View Monthly Plan Pricing
Ready to reduce the risk of site crashes?
Load testing gives you the peace of mind your site can handle it.