Loadster

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Introduction

Loadster helps you find your site’s breaking point before your users do. Scripts can use Playwright, Browser Bots (real headless Chrome) or Protocol Bots (lightweight HTTP user agents suited to APIs and simple sites), and you can launch thousands of concurrent bots from 32 AWS and GCP regions.

The same scripts work for load testing, stress testing and synthetic monitoring. Running your existing Playwright Test .js or .ts scripts means E2E tests can double as load tests. Enterprise customers can run tests from Loadster Cloud or their own infrastructure.

Features

1. Playwright scripts: Reuse E2E tests.
2. Browser Bots: Real headless Chrome.
3. Protocol Bots: Lightweight HTTP.
4. 32 cloud regions: AWS and GCP.
5. Synthetic monitoring: Same scripts.

Pros

1. Pay-as-you-go: Fuel units never expire.

Cons

1. Browser load is costly: Real browsers use more units.

Usage and Links (Example)

1. Start free with 50 units.
2. Import a Playwright test.
3. Scale bots and regions, then review results.

Resources:

• Loadster website

Pricing

Loadster offers pay-as-you-go Fuel at $97 per pack of 1,000 units (they never expire; start free with 50 units), a Team plan at $499 a month billed annually ($5,988 a year) and Enterprise from $1,499 a month.

Recommended for?

1. Teams wanting realistic browser-based load tests.

Conclusion

Loadster bridges E2E scripts and load testing.

Use Protocol Bots for API-heavy scenarios.

On CheckOps, Loadster is filed under the Performance & load and Production monitoring & observability stages. Related tools listed here include K6, JMeter, Gatling, Locust, Artillery and Checkly. Which one fits best depends mostly on your stack, your team’s size and skills, and whether you prefer to run tools yourself or pay for a managed service. This page reflects the official website, documentation and repository as they stood on 11 November 2026.