True RUM Monitor collects performance data directly from your site's visitors, providing developers and site owners with accurate metrics on load times and user experience. It is designed for those who need to move beyond synthetic tests and understand how their site performs in real-world conditions.

Real User Metrics: Captures data like First Contentful Paint and Time to Interactive from actual visitors, not simulated tests. JavaScript Error Tracking: Logs client-side errors across different browsers and devices to help pinpoint specific code issues. Resource Performance Analysis: Identifies slow-loading assets such as images, scripts, and CSS files that delay page rendering. Open-Source Transparency: The code is publicly available, allowing for customization, community contributions, and avoiding vendor lock-in. Developer-Friendly Implementation: Designed for easy integration and provides actionable data to guide performance optimizations and debugging efforts.