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Loadster

Loadster

Browser/RUM Commercial Hybrid

NOT YET REVIEWED · CATALOG DATA

MAINTAINED BY · Loadster, Inc., based in Phoenix, Arizona, United States.

Official site ↗
Pricing model
Free trial and paid plans.
First released
Not verified
Last verified
Answer

Loadster is a cloud-based SaaS platform used for load testing, stress testing, and site/API monitoring of websites and web applications. It enables users to detect performance bottlenecks and site outages by simulating traffic from global cloud regions or self-hosted engines.

What it is

Loadster is a cloud-based SaaS platform used for load testing, stress testing, and site/API monitoring of websites and web applications. It enables users to detect performance bottlenecks and site outages by simulating traffic from global cloud regions or self-hosted engines.

Features

  • Cloud-hybrid load testing (global cloud regions or self-hosted engines)
  • Site and API monitoring with active bots
  • Visual scripting for user flows
  • JavaScript-based Code Blocks for advanced logic and custom programming
  • Headless Chrome browser automation for user interaction simulations

Best for

  • Browser/RUM scenarios across typical web and service stacks
  • Organizations budgeting for commercial licenses or subscriptions
  • Groups comfortable scripting in JavaScript

Not the best fit when

  • Projects that require a fully free open-source stack only

Architecture and concurrency

Loadster is commonly operated as hybrid software with scenario authoring in JavaScript. Concurrency and distribution depend on how you size workers or injectors.

Fact sheet

Specs

Scripting
JavaScript
Protocols
HTTPHTTPSWebSocket
Operating systems
WindowsmacOSLinux
Tags
browserapidesktop

Pricing

Loadster uses a usage-based 'Fuel' system. Options include monthly fuel plans (starting at $77/month) and pay-as-you-go fuel that does not expire. Custom and enterprise plans are available upon request.

Sources

SHOW SOURCES

LAST VERIFIED · 2026-08-11 · GROUNDED VIA EXA · CURATED BY NAVEENKUMAR NAMACHIVAYAM

Frequently asked

ANSWER-SHAPED
Who is Loadster for?

Loadster is best for teams validating real-browser or end-user experience under load. It is commercial software, typically licensed for larger or governed programs. Vendor: Loadster. Deployment model: hybrid. Free trial and paid plans. Confirm details against the official site and a short proof-of-concept in your environment.

How does Loadster differ from BrowserUp?

Compared with BrowserUp, scripting centers on JavaScript rather than Java, JavaScript. Loadster lists protocols HTTP, HTTPS, WebSocket; BrowserUp lists HTTP, HTTPS. Status is active versus active. Use the Test Rig to compare full specs side by side before a proof-of-concept.

What scripting language and concurrency model does Loadster use?

Loadster uses JavaScript for scripting or scenario definition. Runtime model: code-first scenarios where virtual users execute scripted behavior under load. OS support: Windows, macOS, Linux. Protocols: HTTP, HTTPS, WebSocket. Match these to how your team already authors tests and which systems you must drive under load.

What is the cloud or enterprise path for Loadster?

Loadster supports a hybrid path that can combine self-hosted controllers or agents with cloud or distributed load as the product allows. Teams often keep sensitive assets private while bursting generators into the cloud. Pricing model: Free trial and paid plans.

What are known limitations of Loadster?

Loadster limitations to weigh: commercial licensing and quotes can gate large-scale or enterprise use. Status: active. Always validate against your target protocols and scale with a proof-of-concept. Confirm details against the official site and a short proof-of-concept in your environment.