Load testing and monitoring for websites, web apps, and APIs. Load test your site with tens of thousands of headless Chrome browsers or automated HTTP clients.

Joined April 2011
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New in Loadster: - Playwright Test support for monitoring and load testing - Core Web Vitals with acceptance thresholds and trends - Improved monitoring maintenance windows - Monaco editor and dashboard refinements Read on... (1/5)
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Better Monitoring Maintenance Windows When you set up your Loadster monitoring maintenance windows, it's now your choice whether they pause monitors entirely during the window or run the monitors but mute alerts. (4/5)
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Also, Loadster now uses a Monaco-based script editor (the one from VS Code) with autocomplete, autoformat, and more. Pretty nice way to edit your JS scripts. Lots more UI improvements too. Check out the full list at: loadster.com/changelog/ (5/5)
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Loadster retweeted
Took me 7 minutes to sign up for @loadsterperf, set a test up, and have it run a 3 minute test on a new website. Very easy to use tool and super helpful to know the site could handle 25 bots hitting the site hundreds of times in a short time span.
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29 Jul 2025
Sorry for the late announcement, but Speedway is now Loadster Site & API Monitoring! Reuse your load test scripts for 24/7 site monitoring. Continuously test entire user journeys with headless Chrome browsers and get alerted if anything breaks. loadster.app/intro/site-and-…
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19 Nov 2024
2024.10 Loadster Changelog Updates * Monitoring Plans – Predictable Site & API Monitoring plans in Loadster. * Better Script Recording – Major updates to the browser extension. * Browser Script Timeline – Full DOM & Browser Console. loadster.app/changelog/
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4 Oct 2024
2024.09 Loadster Changelog Updates Webhook Improvements – Get notified and programmatically handle load test results. Recording Hover Events – Nice for sites with hover menus, etc. …plus 9 other UX and bug fixes. loadster.app/changelog/
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Loadster retweeted
Just used @loadsterperf, it's just so easy to use! Tested one of my golang server, turns out it can run ~2 millions requests per day easily with $0 just on free tiers! It's really crazy to see how much we can do for free!
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Loadster retweeted
I try not to post too much coding geekery, but wow, just used @loadsterperf for the first time in years. Easy load testing for a new web app. So easy. Also, apparently, @TwitterEng should check it out... #TwitterDown
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18 Oct 2022
Here's what's new and improved in Loadster recently... * Graph Timestamps on Hover * Trace Filtering * Request Details in Protocol Traces * Faster Script Playing from North America and Europe * Speedway Limit Emails * Other Fixes & UX Improvements loadster.app/changelog/
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9 Sep 2022
Recent Loadster updates... * Delayed Start for Bot Groups * Individual Keypress Actions for Browser Bots * Speedway Notification Policies * Speedway Maintenance Windows loadster.app/changelog/ Thanks to everyone who requested these!
Loadster retweeted
7 Jul 2022
Our latest Radar report 📈 "Cloud Performance Testing Tools" by @Delzermd gigaom.io/3NQJQVx Featuring: @ApacheJMeter @apicasystems @grafana @loadsterperf @MicroFocus @nastel @RadViewSoftware @SmartBear @Tricentis
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25 Mar 2021
Our static site hosting provider is having issues and loadster.app is currently unreachable. Already migrated, but DNS changes need to propagate. Backend services are unaffected. Apologies for the trouble and we’ll be back soon.
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25 Mar 2021
The static site issues should now be resolved and fully propagated for everyone, but if you have further trouble, reply here or email help@loadster.app. Sorry again for the downtime!
10 Feb 2021
If you're launching load tests from your CI environment with the Loadster CLI, make sure to upgrade to the latest version 1.4.0, which fixes some API breakage. Thanks to Benoit for submitting the fix! github.com/loadster/loadster…
Loadster retweeted
It's load-testing time for ScrapingBee 🐝. If you ever need to do this, just use loadster.app! Killer app that saves me so much time.
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