Skip to content
SPECIFICTION
Get listed

GTmetrix

gtmetrix.com

From $4.99/mo Free plan WebAPI
Visit gtmetrix.com
Spec score 8.4 #14 of 55 in Website Monitoring Software

What it is

GTmetrix tests website performance and explains causes of slow pages and possible optimizations. Reports combine Lighthouse-based performance and structure scores, Web Vitals, and impact-ranked audits. Tests run in a real Chrome browser, while waterfall charts show each request’s timing, status, response size, and headers. Chrome UX Report data supplies field measurements such as INP when a site has sufficient Chrome traffic. Testing covers 28 global locations and simulations of more than 55 mobile and tablet devices. Monitored pages can run hourly, daily, weekly, or monthly, with historical graphs and alerts. GTmetrix provides a REST API and MCP server and names Claude, Cursor, GitHub Copilot CLI, ChatGPT, and Lovable as compatible AI coding tools. The free plan requires no card. Paid plans start at $4.99 a month billed yearly; API requests use credits.

Spec sheet

Purpose
GTmetrix tests website performance and explains why a page is slow and how to optimize it.Read 11 Oct 2026 · gtmetrix.com
Audience
GTmetrix describes its users as developers, marketers, hobbyists, agencies, small businesses, and enterprises.Read 11 Oct 2026 · gtmetrix.com
Support
Enterprise plans include priority support, and the site provides a contact option for questions.Read 11 Oct 2026 · gtmetrix.com
Headquarters
Lyon, FranceRead 28 Sep 2026 · gtmetrix.com
Founded
2009Read 28 Sep 2026 · gtmetrix.com
API access
The REST API requires an API key, uses HTTPS, and meters analysis requests with credits.Read 11 Oct 2026 · gtmetrix.com
Devices and locations
The product offers testing from 28 global locations and simulates more than 55 mobile and tablet devices.Read 11 Oct 2026 · gtmetrix.com
Fair use limit
Unlimited On-Demand Tests are subject to a fair use policy, and GTmetrix may restrict or suspend excessive or abusive use.Read 11 Oct 2026 · gtmetrix.com
Monitoring
Monitored pages can be tested hourly, daily, weekly, or monthly, with historical graphs and performance alerts.Read 11 Oct 2026 · gtmetrix.com
Privacy and security
The privacy policy says GTmetrix does not receive or store Google, Microsoft, or GitHub account passwords used for third-party sign-in.Read 11 Oct 2026 · gtmetrix.com
Real browser
GTmetrix loads tests in a real Chrome browser and measures observed page performance.Read 11 Oct 2026 · gtmetrix.com
Real user data
GTmetrix uses Chrome UX Report data for field measurements including INP, when a site has sufficient Chrome traffic.Read 11 Oct 2026 · gtmetrix.com
Reports
Reports combine Lighthouse-powered performance and structure scores with Web Vitals and audits ranked by impact.Read 11 Oct 2026 · gtmetrix.com
Team access
Expert plans include five team seats with Owner, Administrator, Tester, and Viewer roles.Read 11 Oct 2026 · gtmetrix.com
Waterfall
Waterfall charts break page loads down request by request, including timing, status codes, response sizes, and headers.Read 11 Oct 2026 · gtmetrix.com
Workflow and integrations
GTmetrix offers a REST API and MCP server, and its homepage names Claude, Cursor, GitHub Copilot CLI, ChatGPT, and Lovable as compatible AI coding tools.Read 11 Oct 2026 · gtmetrix.com

Plans and prices

Free Free Free option; no credit card required Read 11 Oct 2026 · gtmetrix.com
Lite $4.99 a month billed yearly 50 On-Demand Tests/month · 1 Monitored Slot · 5 Test Locations · Trial – 10 API/MCP Credits · 1 Month Data Retention · No Hourly Monitoring · No Team Seats Read 11 Oct 2026 · gtmetrix.com
Core $9.99 a month billed yearly 150 On-Demand Tests/month · 3 Monitored Slots · 10 Test Locations · 10 Daily API/MCP Credits · 6 Months Data Retention · No Hourly Monitoring · No Team Seats Read 11 Oct 2026 · gtmetrix.com
Advanced $24.99 a month billed yearly Unlimited On-Demand Tests* · 10 Monitored Slots · 28 Test Locations · 50 Daily API/MCP Credits · 6 Months Data Retention · Hourly Monitoring · No Team Seats Read 11 Oct 2026 · gtmetrix.com
Expert $49.99 a month billed yearly Unlimited On-Demand Tests* · 50 Monitored Slots · 28 Test Locations · 100 Daily API/MCP Credits · 12 Months Data Retention · Hourly Monitoring · 5 Team Seats Read 11 Oct 2026 · gtmetrix.com
Enterprise Plans Priced on request Custom plan; more monitored slots, API credits, and team seats; priority support; white-label PDF reports Read 11 Oct 2026 · gtmetrix.com

Every GTmetrix plan and price →

Strong points and limits

Strong points

  • Real Chrome performance measurements
  • 28 testing locations
  • More than 55 device simulations
  • Waterfall request diagnostics
  • Scheduled monitoring with alerts

Limits

  • API requests consume credits
  • Unlimited tests follow fair-use rules
  • Paid plans begin at 4.99 USD monthly
  • Hourly monitoring is not on lower plans

Who it suits

GTmetrix suits developers, marketers, hobbyists, agencies, small businesses, and enterprises monitoring web performance. It is useful for teams needing browser tests, location and device coverage, reports, or scheduled monitoring.

Verdict

GTmetrix combines lab testing, field data, diagnostics, and recurring monitoring for website performance work. A free option is available, while broader locations, monitoring, retention, team seats, and API credits depend on paid tiers.

Where Specifiction places it

Alternatives to GTmetrixAll alternatives →