GTmetrix is a website performance service for measuring page speed and finding potential causes of slow loads. Its reports pair Lighthouse-powered performance and structure scores with Web Vitals and audits ordered by impact. Tests run in a real Chrome browser, while request-level waterfall charts show timing, status codes, response sizes, and headers. For sites with sufficient Chrome traffic, GTmetrix also uses Chrome UX Report data for field measurements such as INP. Testing is available from 28 global locations and can simulate more than 55 mobile and tablet devices. Users can schedule monitored pages hourly, daily, weekly, or monthly, then review historical graphs and performance alerts. The service includes a REST API and MCP server; its homepage names Claude, Cursor, GitHub Copilot CLI, ChatGPT, and Lovable as compatible AI coding tools. API analysis requests require an API key and use credits. GTmetrix offers web and API access, a free option, and paid plans from 4.99 USD per month billed yearly. It describes its audience as developers, marketers, hobbyists, agencies, small businesses, and enterprises.
Who it is for
GTmetrix suits developers, marketers, agencies, and site owners who need browser-based performance reports, request-level details, or recurring monitoring. Teams that want API or MCP workflows can also consider it, while Expert plans include five team seats.
What is good
- 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.
- A REST API and MCP server support workflows.
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.
Verdict
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.
Get started with GTmetrix
- Visit https://gtmetrix.com/ to access the web service.
- Choose the Free option or a paid plan.
- Use the web platform or API access.
- For REST API requests, obtain an API key and use credits.
- Set monitored-page testing frequency on a plan that includes monitoring.
What the free plan stops at
Lite includes 50 on-demand tests per month, one monitored slot, five test locations, and one month of data retention; it has no hourly monitoring or team seats. Core includes 150 monthly on-demand tests and has no hourly monitoring or team seats. Unlimited on-demand tests on Advanced and Expert are subject to fair use.
Questions about GTmetrix
Is GTmetrix free?
Yes. The Free option is free and does not require a credit card.
What do paid plans cost?
Lite is 4.99 USD per month billed yearly; Core is 9.99 USD per month billed yearly; Advanced is 24.99 USD per month billed yearly; Expert is 49.99 USD per month billed yearly. Enterprise plan pricing is custom.
Which platforms does GTmetrix support?
The listed platforms are web and API.
Does GTmetrix provide monitoring?
Yes. Monitored pages can be tested hourly, daily, weekly, or monthly, depending on plan. Lite and Core do not include hourly monitoring.
Does GTmetrix have an API?
Yes. It offers a REST API and MCP server. REST API access requires an API key, and analysis requests use credits.
How many team seats are included?
Expert includes five team seats with Owner, Administrator, Tester, and Viewer roles. Enterprise plans offer custom team-seat amounts.
GTmetrix plans and pricing
All plansCompared on website monitoring software
- Free plan
- No
- Check types
- http
- Latency monitoring
- Yes
- Page health checks
- Yes
- API access
- Yes
