Which tool should I use?

Use Google PageSpeed Insights directly if you want the full raw audit with code-level recommendations. Use sitescore for a clean overview of both mobile and desktop scores at a glance, or to share results with a client or non-technical team member.

Yes, sitescore is completely free with no account required.

tool comparison

sitescore vs Google PageSpeed Insights

Q: Is sitescore the same as Google PageSpeed Insights?

sitescore uses the Google PageSpeed Insights API, so the underlying scores are identical. The difference is presentation: sitescore shows mobile and desktop side-by-side, explains each score in plain English, and lets you request an action plan by email.

Both use the same underlying data. The difference is in what happens after. Here is when each makes sense.

use sitescore when

you want mobile and desktop side-by-side
you are sharing results with a client or manager
you want a clean score summary, not a full audit
you want an action plan sent to your email
you do not have a Google account handy

use PageSpeed Insights when

you need code-level diagnostics for a specific issue
you are a developer debugging render-blocking resources
you need raw Lighthouse JSON for CI/reporting
you want historical field data via CrUX
you need a shareable Google-branded report URL

feature comparison

feature	sitescore	Google PageSpeed Insights
data source	Google PSI API	Google PSI / Lighthouse
score accuracy	identical scores	identical scores
mobile + desktop at once	side-by-side	one at a time
Core Web Vitals	FCP, LCP, CLS, Speed Index	full audit + CrUX field data
code-level diagnostics	summary only	detailed recommendations
account required	no account needed	no account needed
action plan by email	optional email capture	not offered
plain-English explanations	for each score	technical descriptions
historical trend data	not stored	via CrUX (public sites)
free	free forever	free

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faq

common questions

Is sitescore the same as Google PageSpeed Insights?

sitescore calls the Google PageSpeed Insights API, so the underlying scores are identical. The difference is presentation: sitescore shows mobile and desktop results together, explains each score in plain English, and offers an email-based action plan for non-technical site owners.

Do I need to use both tools?

Not necessarily. Start with sitescore for a fast health check. If a score is poor and you need to diagnose the exact cause (for example, which JavaScript is blocking render), use PageSpeed Insights or the Lighthouse CLI directly for the full audit.

Will fixing these scores actually improve my search rankings?

Google has used Core Web Vitals (LCP, CLS, FID) as a ranking signal since 2021. Sites that score well on performance and SEO consistently outperform slow sites for competitive keywords. Accessibility and Best Practices do not directly affect ranking but do affect crawl quality and user trust signals.

Why does mobile score lower than desktop on most sites?

Google simulates a mid-range Android device on a slow 4G connection for mobile scoring. Most sites are developed on fast hardware and forget that roughly 60 percent of web traffic is mobile. Performance optimizations for mobile (image compression, lazy-loading, code splitting) matter more than ever for both rankings and user experience.