sitespeed.io
sitespeed.io is an open-source web performance measurement and monitoring tool that analyzes web pages and user journeys. It generates comprehensive HTML reports including Core Web Vitals, page loading videos, HAR waterfalls, and optimization recommendations. The tool supports automated scheduled runs, exporting metrics to time-series databases like Graphite or InfluxDB for visualization in Grafana dashboards. It features multi-browser support, connection throttling, and mobile device testing.
Checked on Oct 18, 2026.
Alternative resources
Lighthouse
Automated open-source tool for improving the quality of web pages with audits for performance, accessibility, SEO, and progressive web apps.
Jaeger
Open source distributed tracing platform for monitoring and troubleshooting complex microservices-based distributed systems.
BoxWatch
Server monitoring tool for metrics, cron heartbeats, uptime checks, and process monitoring with an open-source agent.