GTmetrix Alternative: Free Mobile and Desktop Speed Test
Looking for GTmetrix? The test above gives you the core of a GTmetrix report — Lighthouse scores, Core Web Vitals and a ranked list of fixes — for mobile and desktop at once, with no account. It also shows real-user field data from the Chrome UX Report when Google has it for your URL.
GTmetrix goes further on test control: choice of location, device, connection speed and scheduled monitoring. Below is what each one does well, so you can pick by task rather than by brand.
Enterno.io vs GTmetrix
| Feature | Enterno.io | GTmetrix |
|---|---|---|
| Price | Free · paid from $5/mo | Free sign-up · PRO from $4.99/mo to $49.99/mo (billed yearly) |
| Free plan | Mobile + desktop test, no sign-up, daily quota | Free account, no card; free limits not published on pricing page |
| API | REST v4 pagespeed, 200 calls/day free | Lite: 10 trial credits · Core 10/day · Expert 100/day |
| Real-user (CrUX) data | Yes, when available for the URL | Yes |
| Test locations | Google PageSpeed infrastructure, not selectable | Up to 28 locations (5 on Lite) |
| Waterfall and video | Critical-path waterfall, filmstrip on request | Full waterfall, video and filmstrip |
| Scheduled monitoring | Score history and regression watch for signed-in users | 1–50 monitored slots; hourly from Advanced |
Free online tool — page speed test: instant results, no signup.
What the Enterno speed test measures
The speed test calls Google PageSpeed Insights for both mobile and desktop in parallel and shows them side by side: performance score, LCP, FCP, TBT, CLS and Speed Index from the Lighthouse lab run, plus Chrome UX Report field data (real-user LCP, INP, CLS) when Google has enough traffic for the URL. Opportunities are ranked by estimated gain against effort, render-blocking resources are listed in a critical-path waterfall, and a filmstrip of the load can be captured on request.
Signed-in users keep a history of their runs, and a regression watch flags a score or metric that drops below its recent baseline. The same analysis is available in REST API v4 as the pagespeed tool. For a broader view of a page, the performance check combines speed with other front-end signals.
Where GTmetrix is better
- Test locations. GTmetrix tests from up to 28 locations; Enterno uses Google's PageSpeed infrastructure, so you cannot choose where the test runs.
- Devices and throttling. 55+ simulated mobile and tablet devices and custom connection speeds, user agents, resolution and cookies.
- Full waterfall and video. Request-by-request waterfall, video and filmstrip views. Enterno shows only the render-blocking part of the waterfall.
- Scheduled speed monitoring with alerts and trend graphs, hourly on Advanced and Expert.
- Team features: roles, shared dashboards, PDF reports, bulk testing and CSV export.
When Enterno fits better
- You need a quick mobile and desktop check without creating an account.
- You want lab and real-user numbers on one screen, without opening PageSpeed Insights separately.
- You also check uptime, SSL and DNS for the same site; one API key covers all the tools.
- Your budget is closer to zero than to a performance-tool subscription.
For deep request-level debugging, WebPageTest is the heavier option; see WebPageTest alternatives.
Reading the results
Lab and field numbers answer different questions. Lab data is one load on emulated hardware: use it to compare before and after a change. Field data is the 75th percentile of real Chrome users over 28 days: use it to judge whether users actually experience a fast page. If the two disagree, trust field data for the verdict and lab data for the diagnosis.
Start with the largest opportunity in the ranked list, re-run the test after each fix, and check that the mobile score moves, since mobile is where most sites fail Core Web Vitals.
Running the test from a script
The API takes the same URL and a strategy of mobile or desktop:
curl -H "X-API-Key: $ENTERNO_KEY" \
"https://enterno.io/api/v4/pagespeed?url=https://example.com&strategy=mobile"A common pattern is a post-deploy job that runs the mobile test and fails the pipeline if LCP or the score drops past a threshold you choose. Keep the threshold loose at first: lab scores move a few points between runs even when nothing changed.
Why teams trust us
How it works
Enter page URL
Lighthouse analyzes
Get CWV scores & tips
Why Does Site Speed Matter?
Page load speed directly impacts conversion, SEO rankings, and user satisfaction. Google uses Core Web Vitals as a ranking factor. Every extra second of load time cancost up to 7% in conversions.
Lighthouse Analysis
Google Lighthouse-based analysis: Performance, Accessibility, Best Practices, SEO.
Core Web Vitals
LCP (rendering), FID (interactivity), CLS (visual stability) — key Google metrics.
Resource Analysis
Breakdown by type: HTML, CSS, JavaScript, images, fonts. Size, request count, blocking resources.
Actionable Advice
Specific recommendations with savings estimates: image compression, caching, minification, etc.
Mobile vs Desktop
- Tested on Moto G Power emulation (slow CPU)
- Network: 4G (1.6 Mbps, 150ms RTT)
- Stricter speed scoring
- Google indexes mobile-first
- Priority for SEO optimization
- High CPU performance
- Fast connection without throttling
- Scores typically 20-40 points higher
- Important for B2B and corporate sites
- Use for baseline comparisons
Who uses this
SEO
Core Web Vitals for rankings
Developers
performance optimization
Marketers
speed = conversions
DevOps
performance regression
Common Mistakes
async/defer block rendering. Move to end or add attribute.Cache-Control, the browser reloads CSS/JS on every visit.Best Practices
loading="lazy" for images below the fold.brotli on;Cache-Control: max-age=31536000, immutable. HTML: max-age=0, s-maxage=60.<link rel="preload"> for fonts and CSS. Reduces LCP by 200-500ms.Get more with a free account
Speed check history, competitor comparison and PageSpeed monitoring.
Sign up freeLearn more
Frequently Asked Questions
Is GTmetrix free?
GTmetrix offers free sign-up with no credit card. Paid PRO plans start at $4.99/month billed yearly (Lite) and go up to $49.99/month (Expert) with more tests, locations and API credits.
Does GTmetrix show real-user data?
Yes. GTmetrix now shows Chrome UX Report (CrUX) data alongside its Lighthouse lab report. The Enterno test shows CrUX field data too, when Google has it for the URL.
Can I choose the test location in Enterno?
No. The test runs through Google PageSpeed Insights, which picks the location. Use GTmetrix or WebPageTest if you need to test from a specific city.
Is there an API for the Enterno speed test?
Yes. REST API v4 exposes it as the pagespeed tool with mobile or desktop strategy. The free plan includes 200 API calls a day; see pricing for higher limits.
Why do GTmetrix and PageSpeed scores differ?
Different hardware, network throttling and test locations produce different lab numbers. Compare each tool with itself over time rather than across tools.
Try the live tool that powered this guide
Free plan — 10 monitors, checks every 5 min, no card required. Upgrade for 1-minute interval and multi-region monitoring.