Real Chrome browsers, from script to scale in minutes. Launch tests from 32 cloud regions.
Stop configuring test infrastructure. Start actually load testing. Record a script, launch thousands of bots, and get test results in real time.
Loadster has helped improve the performance, scalability, and uptime of thousands of sites. Proud to be chosen by many of the best teams.
Every website has a breaking point. Find yours before your users do.
Your site might be fast and stable right now, under typical traffic. But what happens when thousands of users hit it at once during a launch, marketing campaign, or unexpected spike? Load testing simulates peak traffic conditions ahead of time, so you can proactively find scalability bottlenecks and optimize for heavy traffic.
Loadster is cloud-based load testing software built for product teams who want results, not a second job maintaining test infrastructure.
Three bot types. One cloud platform. Test the way that fits your stack.
Loadster supports three different bot types, all running from the same cloud infrastructure with shared reporting. Pick the one that fits your tests, or mix and match within a single scenario.
Playwright Bots
Run your Playwright Test scripts at scale through Loadster's cloud. Ideal for teams already using Playwright or who want programmatic control with an open source testing framework, combined with Loadster's cloud scaling and reporting.
4X
Browser Bots
Record scripts in your browser with Loadster's free extension and edit them visually. Add JavaScript if necessary. Browser Bots automate real headless Chrome browsers for realistic web application testing with a minimal learning curve.
4X
Protocol Bots
Protocol Bots execute scripted HTTP/S requests against your API or static website. Testing at the protocol layer is cost-effective and easily scales to hundreds of thousands of concurrent bots, and is ideal for testing HTTP APIs at scale.
1X
Load test from 32 cloud regions across AWS and GCP clouds. Monitor from 8 dedicated locations on 5 continents.
Faster results, less effort. Loadster makes you faster with browser-based scripting, fully managed infrastructure, live metrics, and automatic reporting.
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Script Recording
Record scripts right in your browser with the free Chrome or Firefox extension. Or add steps manually, if you prefer.
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Quick Editing
Edit your scripts and replay them with a single bot until it works perfectly... all from your browser.
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Instant Playback
As you play scripts from your web browser, watch the results in real time as each step runs. Edit and repeat as necessary!
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Diagnostic Traces
After your script runs, you can inspect requests, responses, screenshots, and errors from every step.
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Managed Cloud
No need install anything or set up test infrastructure! Loadster spins up fully managed cloud instances in about 2-3 minutes.
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Live Results
As each load test runs, keep an eye on the real-time graphs and tables. Observe your site's response times, throughput, and errors.
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Automatic Reports
Loadster automatically generates a full test report with charts and tables after each test. No more tedious manual reporting.
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Team Collaboration
Invite your colleagues, and anyone on your team can create scripts, run tests, and share results. Make scalability a team effort!
Loadster scales with your testing and your budget. Choose between flexible pay-as-you-go and subscription pricing.
Monthly Fuel Plans
Starting at $78 a month
Subscribe to a monthly plan to automatically add fuel every month at a discount. Unused fuel rolls over as long as you keep the plan.
Plan PricingPay As You Go
Starting at $97 for 1000 units
Purchase as much Loadster Fuel as you need for your load testing and monitoring. No commitment, just buy it when you need it.
Fuel PricingNot just a load testing tool. Reuse your scripts for 24/7 site & API monitoring.
The same Loadster scripts you write for load testing also power 24×7×365 site monitoring. Instead of running thousands of bots at once, a monitor runs a single bot on a schedule and alerts you via email, SMS, PagerDuty, Opsgenie, or Slack the moment something breaks.
One platform, one set of scripts, both jobs covered.