Why are my scores different from PageSpeed Insights?

SlapMyWeb scores vs PageSpeed Insights

If your overall SlapMyWeb score is 73 but PageSpeed says 92 — that's expected. We measure more.

What PSI measures

PageSpeed Insights v5 returns:

• 4 lab category scores (Performance · Accessibility · Best Practices · SEO)
• 7 Core Web Vitals lab metrics
• Field data from Chrome UX Report (if enough real-user traffic)

That's it. It's a tight, focused tool — and we use it inline as one of our 16+ inputs.

What SlapMyWeb adds

The public scan describes 125+ checks across 10 audit areas. The overall score is calculated across eight dimensions: Speed, SEO, Security, Mobile, Design, Accessibility, Best Practices, and Content. Audit coverage areas are not score pillars; AI crawler diagnostics do not add a separate scored pillar.

So a site can score well on PageSpeed performance and still have other issues in its metadata, structured data, international signals, or security configuration.

When to trust which

• Engineering-focused changes (performance): PSI is your source of truth — we report what it reports
• Broader site audit: use SlapMyWeb's report to review the additional SEO and technical checks it runs
• Comparing periods: Our Compare mode shows score deltas across runs, which PSI doesn't do at all

Both are right at what they measure. They just measure different things.