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GTmetrix vs Yottaa Real User Monitoring

Both stand on website monitoring software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

GTmetrix

Free plan APIWeb

Choose GTmetrix for detailed page diagnostics, recurring checks, and options to test from multiple locations and devices. The free option provides a way to start, while teams needing seats should look at Expert; API users should account for credit limits and plan allowances.

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Yottaa Real User Monitoring

Free plan APIWeb

Choose Yottaa Real User Monitoring if your commerce team needs performance visibility across the full delivery path, including route-level metrics and Core Web Vitals. Free diagnostics are available without a credit card. Check the package details if your retention needs extend beyond the listed 90+ days or depend on a specific historical-data window.

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The facts

GTmetrixYottaa Real User Monitoring
Free planYesYes
Open sourceNot publishedNot published
Runs onAPI, WebAPI, Web
Lowest paid planLite: $4.99 a monthYottaa Starter: $12,000 a year
Plans published66
MakerNot publishedNot published
Websitegtmetrix.comyottaa.com
On website monitoring software#9 of 55#38 of 55

GTmetrix: what it does well

  • Real Chrome tests measure observed page performance.
  • Waterfalls show request timing, status, size, and headers.
  • Reports combine scores, Web Vitals, and impact-ranked audits.
  • Tests cover 28 locations and over 55 simulated devices.
  • Monitoring supports schedules, history graphs, and alerts.

What to know first

  • Lite limits users to 50 on-demand tests each month.
  • Lite and Core do not include hourly monitoring or team seats.
  • API analysis requests consume credits.
  • Unlimited on-demand testing is subject to fair use.

Yottaa Real User Monitoring: what it does well

  • Connects browser, edge, and origin performance data.
  • Breaks down LCP, INP, and CLS by page and element.
  • Reports soft navigation metrics for single-page applications.
  • Lists native integrations with GA4, Adobe Analytics, and Shopify Analytics.
  • Provides REST API and MCP server access to performance data.

What to know first

  • Request data setup uses Fastly real-time log streaming.
  • Historical retention varies by package.

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