You run the tests, we handle the infrastructure. Loadster is a load testing platform built for fast-moving teams.
Loadster is a load testing, stress testing, and site monitoring platform. Run your load tests at scale with thousands of concurrent bots, then reuse the same scripts for 24/7 site monitoring.
Everything you need for your load testing in one platform. Testing, monitoring, reporting, and scaling with fully managed infrastructure.
A load testing tool generates traffic. A platform takes care of everything around it: provisioning cloud load generators, scheduling tests, persisting results, alerting on failures, managing team access, and integrating with the rest of your workflow.
Loadster covers load testing, stress testing, Playwright scripts at scale, spike testing, soak testing, and 24/7 site monitoring from a single platform. The same scripts you write for load testing also power ongoing monitors — no duplicate tooling, no separate test suites to maintain.
Tests run on demand from 32 AWS and GCP cloud regions worldwide. You pick the regions, Loadster spins up the load generators. Results stream back to your browser in real time.
You write the scripts, Loadster runs the bots. Test with your choice of Playwright, Browser Bots, or Protocol Bots.
The platform supports three bot types, all running from the same cloud infrastructure with shared reporting. Pick the one that fits your tests; you can mix and match across projects or even 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
Scripts are versionable, shareable across your team, and parameterizable with datasets so every bot behaves like a different real user. See the Loadster manual for the full scripting reference.
Load testing and monitoring on the same platform. Write one set of scripts and reuse them for both.
Most load testing tools just do load testing. Loadster's platform treats load testing and 24/7 site monitoring as different ways to run the same scripts: thousands of bots at once for a load test, a single bot on a schedule for a monitor.
Load Testing
Run hundreds or thousands of concurrent bots from your choice of cloud regions. Measure response times, throughput, error rates, and Core Web Vitals in real time. Rerun after each infrastructure change to compare before and after.
Site Monitoring
Take the same script and schedule it as a monitor. A single bot runs on a cadence — every minute, every five minutes, or whatever. Loadster alerts you the moment something breaks, with links to failed cycles and traces for faster debugging.
Having one platform that supports both load testing and monitoring means you don't have to maintain two separate test suites, and your monitoring covers the same user flows you load test.
Integrations and workflow hooks. Run tests in CI, alert into your incident tooling, share reports with your team.
CI/CD Pipelines
The Loadster CLI runs load tests from GitHub Actions, GitLab CI, Jenkins, CircleCI, and any other CI environment. Wire load tests into your deployment pipeline to catch regressions quickly.
Incident Management
Loadster has built-in integrations with PagerDuty, Opsgenie, Slack, and webhooks. Monitoring failures immediately become incidents in the tools your team already watches.
Team Collaboration
Loadster supports multi-user projects with role-based access. Share scripts, tests, and reports across your team. Optionally share test reports and monitoring results outside your organization with a magic link.
Single Sign-On
SAML SSO is available for teams that need it, alongside standard email and password authentication. Loadster integrates with the identity providers your organization already uses.
Load test from 32 cloud regions across AWS and GCP clouds. Monitor from 8 dedicated locations on 5 continents.
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 sure if Loadster is the right load testing platform for your team? Give it a try with 50 free units of Loadster Fuel.
A free Loadster account comes with 50 units of Loadster Fuel, which is enough to run a handful of load tests or quite a bit of monitoring. No credit card required. Upgrade only when you're ready for more capacity.
Loadster has helped improve the performance, scalability, and uptime of thousands of sites. Proud to be chosen by many of the best teams.
Move fast
Don’t crash
Ready to cut your risk of downtime? Load test to prevent crashes. Monitor to react quickly.