Load Testing + Stress Testing + Monitoring Platform
Load test with thousands of Browser Bots, Protocol Bots, or Playwright browsers from 32 cloud regions. Monitor round-the-clock from around the world and get alerts about downtime or broken flows. Proactive and reactive performance engineering for websites, web apps, and APIs.
Load testing + site monitoring = high availability. Prepare for heavy traffic. React quickly to problems.
Loadster is a cloud-based performance engineering platform that uses the same scripts for load testing and site monitoring, so you can both test and monitor your site's key pages and critical flows.
Load testing your site will proactively determine how it will handle heavy load in a real high-traffic event. Discovering your site's breaking point and then eliminating scalability bottlenecks will make your site more resilient and far less likely to crash when a surge of real traffic hits.
Monitoring your site's critical flows 24/7 is just as important. Even highly optimized sites may suffer unplanned downtime. Active site monitoring, with bots constantly testing your site's most important user journeys, will help you detect problems and react to them before your users are impacted.
Loadster's combination of proactive load testing and reactive monitoring is just what you need for high-availability websites, web apps, and APIs.
Load Testing
ProactiveLoad test your site with thousands of concurrent bots to prepare for heavy traffic. Find the breaking point, identify scalability bottlenecks, and optimize performance to prevent site crashes under peak load.
Find your site's breaking point before peak traffic catches you off guard.
Site Monitoring
ReactiveMonitor your site 24×7×365 with bots to detect problems quickly and ensure your site stays fast, functional, and always available. Bots test your site at all hours from multiple locations around the world.
Detect downtime and other problems before real users are impacted.
Automate real headless Chrome browsers or lightweight HTTP clients. Your choice of Playwright, Browser Bots, or Protocol Bots.
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
Playwright
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
Load test on demand from 32 AWS and GCP cloud regions. Monitor continuously from 8 locations across 5 continents.
Performance engineering results with less time and effort. Loadster makes your team 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 predictable subscription pricing.
Monthly Fuel Plans
Starting at $77 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.
Check 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.
Check Fuel PricingLoadster has optimized the performance, scalability, and uptime of thousands of sites. We're proud to be a testing platform of choice to elite teams.
Move fast
Don’t crash
Ready to cut your risk of downtime? Load test to prevent crashes. Monitor to react quickly.