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Head-to-head · Core Web Vitals Monitoring Tools

GTmetrix vs WebPageTest

  • Updated Nov 2026
  • Both researched from official sources
  • 1 check side by side
Higher score GTmetrix #2 in Core Web Vitals Monitoring Tools 9.1/10 Paid ✓ 0 of 3 features Visit GTmetrix
WebPageTest #3 in Core Web Vitals Monitoring Tools 9.0/10 Free plan Free plan✓ 0 of 3 features Visit WebPageTest

GTmetrix leads on 0 checks, WebPageTest on 1, and 0 are even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGTmetrix · 9.1/10
  • Free planonly WebPageTest

GTmetrix scores higher on our rubric for core web vitals monitoring tools: 9.1 against 9.0 out of 10; our editors rank them #2 and #3.

WebPageTest offers free plan; GTmetrix doesn't.

GTmetrix is the better fit for teams wanting synthetic and scheduled Web Vitals testing. WebPageTest is the better fit for open-source performance engineers and test labs.

  • GTmetrix fits best

    Teams wanting synthetic and scheduled Web Vitals testing

  • WebPageTest fits best

    Open-source performance engineers and test labs

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Side by side

Feature GTmetrix 9.1/10 Visit ↗ WebPageTest 9.0/10 Visit ↗
At a glance
Editor score 9.1 9.0
Ranking #2 in Core Web Vitals Monitoring Tools #3 in Core Web Vitals Monitoring Tools
Best for Teams wanting synthetic and scheduled Web Vitals testing Open-source performance engineers and test labs
Pricing model Paid Free plan + paid
Starting price — Free plan
Free plan — ✓ (best)
Free trial — —
Deployment Cloud, Browser extension Cloud, Self-hosted
Platforms Web Web
Features GTmetrix 0/3 · WebPageTest 0/3
Real-user monitoring Not checked yet Not checked yet
Synthetic monitoring Not checked yet Not checked yet
CI budget checks Not checked yet Not checked yet
Specs
Alert channels Not checked yet Not checked yet
Data retention Not checked yet Not checked yet
Synthetic test locations Not checked yet Not checked yet
Our review
Pros
  • Lighthouse reports include Web Vitals and detailed waterfall charts.
  • Schedules, alerts and history support ongoing performance tracking.
  • Global locations, mobile simulation, REST API and MCP access.
  • Tests pages across browsers and locations, with page- and request-level metrics
  • Includes Lighthouse runs, scripted tests, and API access
  • Open-source with cloud and self-hosted deployment options
Cons
  • No perpetual free plan; access is paid after the free trial.
  • Monitoring frequency and capacity vary by plan.
  • Focused on page performance, not SSL, status-page, ping, DNS or keyword monitoring.
  • Does not provide continuous page-speed monitoring
  • Does not include site audits
  • Does not include A/B testing
Our verdict

GTmetrix is a web-based website performance testing and monitoring platform for website owners, developers, marketers, agencies and teams of different sizes. It runs tests in real Chrome browsers from global locations, measuring Lighthouse…

Read the review →

WebPageTest is a website performance testing tool for developers and teams investigating how web pages load. It runs tests with real browsers and locations, then presents performance results for analysis. Its emphasis is on running and…

Read the review →
  1. GTmetrixCore Web Vitals Monitoring Tools 9.1Paid
  2. WebPageTestCore Web Vitals Monitoring Tools 9.0Free plan

Strengths and trade-offs

  • GTmetrix — where it wins

    • Lighthouse reports include Web Vitals and detailed waterfall charts.
    • Schedules, alerts and history support ongoing performance tracking.
    • Global locations, mobile simulation, REST API and MCP access.

    Where it doesn't

    • No perpetual free plan; access is paid after the free trial.
    • Monitoring frequency and capacity vary by plan.
    • Focused on page performance, not SSL, status-page, ping, DNS or keyword monitoring.

  • WebPageTest — where it wins

    • Tests pages across browsers and locations, with page- and request-level metrics
    • Includes Lighthouse runs, scripted tests, and API access
    • Open-source with cloud and self-hosted deployment options

    Where it doesn't

    • Does not provide continuous page-speed monitoring
    • Does not include site audits
    • Does not include A/B testing

More comparisons

All core web vitals monitoring tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

Last updated · How we research and update