PageSpeed gives you the test. nimo gives you the first fix to review.
Use PageSpeed Insights when you want a free page check from Google. Use nimo when the result needs to become one clear fix, owner, and check-again step.
Report preview
PSI can show the problem. nimo turns the same evidence into a likely cause and first action.
CrUX label: public field data, previous 28-day window when available
Lighthouse label: point-in-time lab diagnostic
Next check: reduce render-blocking work before changing the whole page
Owner: developer or CMS owner, depending on where the issue lives
Choose nimo if
The score has to become a next step.
You need to explain why two speed results do not tell the same story.
You want one first action and a check-again step in plain language.
You need a report a developer, marketer, or CMS owner can use without reading the raw audit.
Choose PageSpeed Insights if
You need Google's free single-page diagnostic.
You want Google's free mobile and desktop diagnostic for a single page.
You need a quick Lighthouse report without creating an account.
You already know how to turn raw audits into a safe implementation plan.
Source labels
Keep the technical labels in the details.
PageSpeed Insights can combine Lighthouse lab data with CrUX field data when field data is available. nimo keeps those labels visible so the next step is based on the right kind of evidence.
CrUX field data
Public Google field data from real Chrome usage when enough data is available.
It commonly reflects the previous 28-day collection period, so it is not same-day proof.
Lighthouse lab data
A controlled, point-in-time diagnostic run that helps debug a specific page.
It can disagree with field data because it is a test environment, not the whole audience.
Unavailable
The page or origin did not have enough public field data for the requested view.
Use lab diagnostics for the immediate next step, then rerun later if field data appears.
Workflow
nimo turns the result into work someone can review.
The goal is not to replace PageSpeed Insights for everyone. It is to reduce the translation work between a diagnostic report and the first practical change.
Label the source
Keep the technical source visible in the report detail so the reader sees which facts came from CrUX, Lighthouse, or no available source.
Explain the cause
Translate the evidence into the most likely reason the page feels slower or needs more investigation.
Pick the next check
Name the owner, first action, and check-again step to use after the change.
Wait for field data
Rerun Lighthouse after deploy, then wait for CrUX to catch up before treating the field gap as closed.
Tradeoffs
Be fair about where PageSpeed is stronger.
PageSpeed Insights is hard to beat when the job is a quick free diagnostic from Google's ecosystem. nimo wins when the job is turning that evidence into a labeled explanation and a first action someone can review.
PSI is stronger for
Free mobile and desktop diagnostics, quick Lighthouse details, and direct visibility into the source labels Google provides.
nimo is stronger for
Explaining the disagreement, choosing the first action, naming the owner, and creating a simple report to share.
Sources checked
Competitor claims come from official PageSpeed and Chrome docs.
Checked on May 19, 2026. Recheck source labels before changing PSI capability copy or adding any API, quota, or new-feature claim.
FAQ
Common questions before you compare.
Is nimo a replacement for PageSpeed Insights?
No. PageSpeed Insights is still useful for quick free diagnostics. nimo is for turning the evidence into a clearer report with a source label, first action, owner, and check-again step.
Why can CrUX and Lighthouse disagree?
CrUX is public field data from real Chrome usage when enough data exists. Lighthouse is a point-in-time lab run, so the two sources can point at different parts of the problem.
Can this prove a fix worked the same day?
Use Lighthouse for an immediate rerun after deploy. Treat CrUX as delayed field evidence and wait for the field data window to catch up before calling the gap closed.
Run the comparison on your page.
Start with the PageSpeed Insights preset, replace the URLs with the pages that matter, and turn the result into a clear next step.
Run your own comparison