Load test your site to find its breaking point

Simulate thousands of users, find performance bottlenecks.
Test from 15 cloud regions or your own machines.


Load testing from anywhere

Loadster is a cloud-hybrid load testing solution, with a powerful desktop app to control everything. Generate load from 15 cloud regions or your own self-hosted engines. It's the best of both worlds and allows you to test both public and private sites.

Zero to 60,000 in 2-3 minutes (virtual users, that is)

Need to run a massive load test? No problem. Loadster can launch hundreds of fully managed cloud engines in minutes. Say goodbye to spinning up your own infrastructure for load testing, and the extra bills that came with it.

Peace of mind pricing

With Loadster, you'll pay a set monthly price, no matter how many tests you need to run. Our price includes cloud costs and everything, so it's easy to budget for performance with no unexpected surprises. Just tell us the upper limit of virtual users you want to simulate and we'll take care of the rest.

Pro plans starting from
USD $299/month

Get up to speed quickly

Your time is valuable, and Loadster helps you do more with it. Record your test scripts using the Chrome extension or Loadster's own recording proxy. Edit them with the intuitive graphical scripting interface, so you'll be getting valuable test results in record time.

More power for power users

Add custom JavaScript functions to your test scripts, to validate server responses and even capture values for use later in your script. Inspect HTTP headers, scan response bodies, and more. Loadster makes the easy stuff easy, and the hard stuff possible.

Questions? Email info@loadster.app

Load test all the things

Website Load Testing

Got a static website and need to hit it with a lot of load? Loadster's cloud platform can spin up hundreds of cloud instances to simulate tens of thousands of concurrent users hitting your site, in about two minutes. There's nothing to install or manually configure. Load test to prepare your site for a Black Friday sale, a Super Bowl ad, or any other high traffic event.

Web Application Load Testing

Loadster excels at load testing dynamic web applications. Automatic cookie handling, dynamic datasets for unique logins or other user data, and validation/capturing make testing complex transactional user flows a breeze.

API Load Testing

Got a REST, GraphQL, JSON-RPC, XML-RPC or other API? Loadster is a great choice for load testing APIs, because you can easily parse and validate responses and use the data received from your server in subsequent requests.

Load testing... with a positive ROI

Are you a decision maker, wanting to make sure that whatever load testing approach you take generates meaningful results and a positive return on investment? If so, there are a few aspects to consider:

Risk Reduction

How much is reducing the risk of a site failure actually worth to you? In other words, what would be the cost of lost business (plus embarrassment) that could potentially result if your site crashes during a high traffic event? If your site is valuable (or you expect it to be in the future) the cost of a load-related failure is substantial – especially since this sort of failure by its very definition always happens at the worst possible time!

Take a moment and estimate a number (in actual money) for how much the risk of a site failure under load is actually worth to you. Knowing or estimating this number is critical when you're sizing up a load testing effort.

Load and stress testing can reduce the risk of traffic-related site failure by 80-95%. Even a quick volley of load tests can reduce your risk by 30-50%.

Time Cost

Load testing takes time. You'll need to formulate performance and scalability requirements, and someone will need to create test scripts and run the tests. It's an iterative process that can sometimes take a few tries to get a successful test, and then more tests to evaluate the impact of performance tuning or other changes to your site.

Some tools (not Loadster) subject you to extra layers of drudgery on top of that – aggregating data from disparate sources, creating charts and reports, and deploying and maintaining infrastructure.

Loadster takes the value of your time very seriously! With fully managed test infrastructure, automatic reporting, and intuitive no-nonsense scripting, we've done everything we can think of to save your team time and get you results quickly. Shortening the test-to-test feedback loop is the key to successful load testing.

Tool & Infrastructure Cost

Some load testing tools are free (as in beer and sometimes as in speech). Others require a subscription fee or upfront license cost. When you're evaluating tools, remember to consider the infrastructure costs as well! If you end up running a free tool from 87 EC2 instances that you have to separately pay for, deploy, and maintain yourself, that's definitely not free. If you aren't careful, the "total cost of ownership" of a free tool can sometimes be surprisingly high.

Loadster's cloud testing platform is fully managed and automated. We can spin up a fleet of cloud engines for your test in about 90 seconds. These instances are paid for and managed entirely by us, so you won't see them on your cloud hosting bill, and your team won't waste time configuring them. Easy budgeting with no surprise costs.

Need a jump start on your testing?

Let us help you! For a limited time we'll create test scripts for your 2-3 most important user flows, for a fixed price of $699 USD. We'll then work with your team to ensure a smooth hand-off and help you get up to speed quickly.

What can you learn from load testing?

Performance Tuning

Tuning an existing website, web application, or API to perform better is one of the best ways to add value. But don't operate in the dark! Create a repeatable load test to simulate the same user behavior with the same amount of load each time, so you can accurately compare performance before and after each change.

Performance Regression Testing

If you're constantly releasing changes to your web apps, like most software teams, you'll want to know if each successive change makes performance better or worse. Running the same load test against each build lets you compare high-level performance metrics to see if performance has improved or degraded. For the most timely feedback of all, add Loadster to your continuous integration pipeline and get automatic performance test results from each build!

Stress Testing

All systems have a breaking point. When you're building and maintaining a complex system such as a web application or API, it's important to know exactly what happens when it's put under stress by heavy traffic. Do transactions intermittently fail, leaving the system or its data in a half-baked or unclean state? And once the flood of traffic subsides, does the system recover gracefully on its own, or does it remain broken and require manual intervention? Pushing the site beyond the limit with a stress test will give you the answer to these questions.

Stability Testing

Dynamic web applications sometimes run great for a while and then bog down as some resource is gradually exhausted. Don't wait for it to happen in production! Before a major release, run several extended stability load tests and closely monitor the application's performance and stability over a 24-72 hour period.

You'll be running your first test and getting actionable results in minutes.

Questions? Email info@loadster.app

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