Honest comparison

SlapMyWeb vs PageSpeed Insights

PSI is Google's official performance tester. We use the same Lighthouse engine under the hood — then add 23 more agents and an AI Coach to actually tell you what to fix.

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Straight answer first

What each one
is actually better at

We are not going to pretend PageSpeed Insights is bad. It is not. Here is the honest split.

Where SlapMyWeb wins

Bundles Lighthouse with on-page SEO, content, security, schema
AI Coach prioritizes the top 5 fixes by impact × effort
Auto-generated code snippets you can copy-paste
Roman-Hindi roasts that make audits actually fun
Public share links + scan history + compare across deploys
Multi-client cockpit + white-label reports for agencies

Where PageSpeed Insights wins

Free, official Google-blessed scores
CrUX field data from real Chrome users
No login required for single scans
Trusted by Google's own ranking signals

We keep this section honest on purpose. PageSpeed Insights is a good tool with real advantages — pick the one that fits the job in front of you.

The detail

How they differ
once you look closely

CrUX Field Data: PSI's Unique Advantage

PageSpeed Insights is the only free tool that combines Lighthouse lab data with Chrome User Experience Report (CrUX) field data from real users. CrUX tells you what actual visitors experience — not what a synthetic test measures. If your site has enough traffic, PSI shows real-world LCP, FID, CLS, and INP percentiles broken down by device. SlapMyWeb fetches PSI data via the API and includes it in audits, but the original PSI interface presents field vs lab comparisons more clearly. For pure Core Web Vitals monitoring, PSI remains the authoritative free source.

Beyond Performance: The 85% PSI Cannot See

PSI focuses almost entirely on performance and basic accessibility. It does not audit your title tags, meta descriptions, heading hierarchy, internal link structure, content readability, EEAT signals, security headers, SSL configuration, schema.org markup, or image SEO. SlapMyWeb runs 240+ checks across 10 pillars using 16 specialist modules. A site can score 95 on PSI and still have broken canonical tags, missing schema markup, thin content, no HSTS header, and orphaned internal links — all of which SlapMyWeb catches and explains.

Actionability: Raw Scores vs Fix Instructions

PSI tells you "Reduce unused JavaScript — potential savings of 245 KiB" but does not tell you which bundle to split, which library to lazy-load, or how to configure your build tool. SlapMyWeb's AI Coach takes all findings, ranks them by impact multiplied by effort, and generates specific code snippets — an nginx gzip config, a next.config.js image optimization block, a meta tag fix, or a schema.org JSON-LD template. The difference is between knowing something is wrong and knowing exactly how to fix it.

Agency and Team Workflows

PSI is a single-URL tool with no concept of accounts, projects, history, or collaboration. Every scan is ephemeral — you cannot compare this week's results to last month's, share a report link with a client, or manage multiple sites from a dashboard. SlapMyWeb provides scan history with deploy comparisons, public share links, multi-client management, bulk scanning, and white-label PDF reports on the Agency plan. For anyone managing more than one website, the workflow difference is significant.

Decide in ten seconds

Which one
should you open?

Pick SlapMyWeb when…

Pick SlapMyWeb if you want PSI\'s performance data combined with comprehensive SEO, content, security, and structured data auditing in one place — especially if you need scan history, shareable reports, AI-generated code fixes, or agency features. It turns raw performance scores into a prioritized action plan.

Run a free audit

Pick PageSpeed Insights when…

Pick PageSpeed Insights if you need a quick, free, no-login performance check with authoritative Google CrUX field data. PSI is the reference tool for Core Web Vitals and its scores directly reflect what Google uses for ranking signals. For a fast performance sanity check, nothing beats opening pagespeed.web.dev and pasting a URL.

Feature comparison

Side-by-side,
line by line

No asterisks. Where we lose, the row says so.

Feature	SlapMyWeb	PageSpeed Insights
Core Web Vitals	Yes	Yes
CrUX field data	Yes	Yes
Performance opportunities	Yes	Yes
On-page SEO audit	Yes	No
Content readability + EEAT	Yes	No
Security headers grade	Yes	No
Schema validation	Yes	No
AI roast + action plan	Yes	No
Code-fix snippets	Yes	No
Compare across deploys	Yes	No
White-label reports	Agency plan	No
Bulk scanning	Yes	No
Starting price	$0 forever	Free

$0 forever

SlapMyWeb

Full audit free forever

Free

PageSpeed Insights

Entry plan

See it before you switch

This is the whole product, free, without an account

Paste a URL and you get the full audit — every pillar, every check, a score and a plain-English verdict. No trial timer, no card, no "unlock to view". Compare that against whatever PageSpeed Insights shows you before signup.

Audit my site free

Your score

One weighted number, then the issues that produced it — ranked by the points each one cost.

No llms.txt — AI engines can’t cite you−9
LCP 4.1s on mobile−7
Missing meta description on 12 pages−4

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