Sentry

Don’t just observe. Take action. The only app monitoring platform built for developers that gets to the root cause for every issue.

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Status, performance and uptime monitoring for cron jobs, websites, APIs and more.
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Locust is an open source performance/load testing tool for HTTP and other protocols. Its developer-friendly approach lets you define your tests in regular Python code. Locust tests can be run from command line or using its web-based UI
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Free browser plugin to measures page load time and displays it in the toolbar.
Build trust with every incident Easily communicate real-time status to your users, just like DigitalOcean and Dropbox.
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