sitespeed.io

Free open-source tool for testing, monitoring, and optimizing website speed using real browsers.

Desktopfreeglobal

sitespeed.io is a free, open-source tool for testing, monitoring, and optimizing website speed using real browsers across desktop and mobile environments. It runs via Docker or npm and produces detailed performance metrics and dashboards, aimed at web developers and performance engineers who want to track page-speed trends over time, not just a single test snapshot.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of sitespeed.io - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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