WebPageTest Alternative: Quick Mobile and Desktop Speed Test
Looking for WebPageTest? The test above is the quick version: one click runs Lighthouse for mobile and desktop through Google PageSpeed Insights and adds real-user Chrome UX Report data when it exists. No account, no test settings to choose.
WebPageTest is the deep tool: real browsers in 30 locations on the free plan, waterfalls, video, scripting and experiments. It is now maintained by Catchpoint, which is part of LogicMonitor. Use both for different jobs.
Enterno.io vs WebPageTest
| Feature | Enterno.io | WebPageTest |
|---|---|---|
| Price | Free · paid from $5/mo | Starter free · Pro from $180/year (1,000 runs/mo) |
| Free plan | Mobile + desktop test, no sign-up, daily quota | 150 runs/mo, 30 locations, 60-day history |
| API | REST v4 pagespeed, 200 calls/day free | Pro only |
| Browsers and locations | Google PageSpeed infrastructure, not selectable | Chrome, Firefox, Edge, Brave; 30 locations free, more on Pro |
| Waterfall and video | Critical-path waterfall, filmstrip on request | Full waterfall, filmstrip and video |
| Real-user (CrUX) data | Yes, when available for the URL | RUM listed among paid enterprise features |
| Scripting | Single URL load | Custom scripts, up to 3 steps on Starter |
| Source code | Closed, hosted only | Public, Polyform Shield license |
Free online tool — page speed test: instant results, no signup.
What changed at WebPageTest
WebPageTest was created and open-sourced by Patrick Meenan in 2008. Catchpoint maintains it today, and the WebPageTest site now states that it is part of LogicMonitor through Catchpoint. Pricing moved to a free Starter plan and a paid Pro subscription. The code remains public under the Polyform Shield license, which allows self-hosting but restricts building a competing service.
On Starter you get 150 test runs a month, 30 locations, filmstrip and video, Lighthouse, scripts of up to three steps and 60 days of history. Pro starts at $180 a year and adds the API, scheduled tests, alerts, private and bulk tests, experiments and 13 months of history.
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 run history with a regression watch, and REST API v4 exposes the same analysis as the pagespeed tool, including on the free plan.
Where WebPageTest is better
- Real browsers and locations. Chrome, Firefox, Edge and Brave from 30 locations on the free plan. Enterno does not let you pick a browser or a location.
- Full request waterfall with DNS, TCP and TLS timing per request, plus video comparison and repeat-view tests.
- Scripted tests: log in, click, then measure. Enterno tests a single URL load.
- Experiments (Pro): try an optimisation in a sandbox against a control run, without deploying code.
- Public source code you can run yourself under the Polyform Shield license.
When Enterno fits better
- You want an answer in under a minute and do not want to configure runs, browsers or connections.
- You need mobile and desktop side by side with real-user data on the same screen.
- You need an API on a free plan; WebPageTest API access starts with Pro.
- Speed is one of several checks you run on the same site, next to uptime, SSL and security headers.
A practical split: run the quick test after every deploy, and open WebPageTest when a metric regresses and you need to know which request caused it. For a GTmetrix comparison see GTmetrix alternatives.
A workflow that uses both
- After each deploy, call the speed test through the API and record the mobile score and LCP:
curl -H "X-API-Key: $ENTERNO_KEY" \
"https://enterno.io/api/v4/pagespeed?url=https://example.com&strategy=mobile"- If a metric drops past your threshold, run the same URL in WebPageTest from the location closest to your users and compare the waterfall with a run from before the deploy.
- Fix the request that moved, then confirm with both tools.
This keeps WebPageTest runs for the cases that need them and stays within the 150 free runs a month.
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.
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Frequently Asked Questions
Is WebPageTest still free?
Yes. The Starter plan is free with 150 test runs a month, 30 locations and 60 days of test history. Pro starts at $180 per year for 1,000 runs a month.
Who owns WebPageTest now?
Catchpoint maintains WebPageTest, and the WebPageTest site states it is part of LogicMonitor through Catchpoint. Pro pricing is published on the LogicMonitor site.
Can I self-host WebPageTest?
The code is public on GitHub under the Polyform Shield license, which allows running it yourself but not offering a competing service. Expect real setup work for your own test agents.
Does WebPageTest have a free API?
No. API access is listed as a Pro feature. Enterno includes 200 REST API v4 calls a day on the free plan.
Why is the Speed Index different between tools?
It is computed from video frames, so device emulation, network throttling and location change it. Compare runs within one tool, not across tools.
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