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YSlow VS GTmetrix

Compare YSlow VS GTmetrix and see what are their differences

Official YSlow Open Source Project Website. YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.

GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.
YSlow Landing Page
YSlow Landing Page
GTmetrix Landing Page
GTmetrix Landing Page

YSlow details

Website Monitoring Uptime Monitoring Monitoring Tools
Pricing URL-

GTmetrix details

Website Monitoring Uptime Monitoring Performance Monitoring
Pricing URL Official GTmetrix Pricing  

YSlow videos

No YSlow videos yet. You could help us improve this page by suggesting one.

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GTmetrix videos

WordPress Speed Optimization - How I Got 100% GTmetrix Scores

More videos:

  • - A2 Hosting Review + GTmetrix Speed Test - 2020
  • - Another WordPress Page Builder Bites The Dust & Why Most Reporting Tools Like GTMetrix SUCK

Category Popularity

0-100% (relative to YSlow and GTmetrix)

Social recommendations and mentions

Based on our record, GTmetrix seems to be more popular. It has been mentiond 28 times since March 2021. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.

YSlow mentions (0)

We have not tracked any mentions of YSlow yet. Tracking of YSlow recommendations started around Mar 2021.

GTmetrix mentions (28)

  • Free for dev - list of software (SaaS, PaaS, IaaS, etc.) — Reports and thorough recommendations to optimize websites. - Source: / 6 days ago
  • I need Help! My site won’t work on Apple phones.
    I loaded your site from my PC and my iPad (it's still loading...I think), but it was really, really slow. So, I checked on and it received an F. Where are you hosting your website, if I might ask? - Source: Reddit / 9 days ago
  • Tips on getting first sale?
    Exactly this!!! I didn’t start getting sales until I heavily invested my time and efforts into social media. I’d recommend starting on as many platforms as you can, then gradually narrow your focus toward whichever gets you the most attention. I started on Facebook/Instagram/Twitter/Pinterest, and then realized that Instagram is my jackpot. Now I just share my Instagram posts on the others as a way to stay active... - Source: Reddit / 9 days ago
  • Reddit's slow af since the last update.
    Try loading said page on . To reddit admins/devs, please test your pages. - Source: Reddit / about 1 month ago
  • Page Speed Insights went through an upgrade on 1st June 2021 - what changed and how will it affect you?
    For those of you who don't know, Lighthouse is the engine that powers page speed insights,, GT Metrix etc. - Source: / about 1 month ago

What are some alternatives?

When comparing YSlow and GTmetrix, you can also consider the following products

Website Speed Test by Pingdom - Pingdom is a website performance monitoring software.

PageSpeed Insights - PageSpeed is addon for ...

DareBoost - DareBoost is an online tool to test, analyze and monitor your website: speed, SEO, quality, security. All you need for website optimization in a single service.

WebPagetest - Run a free website speed test from multiple locations around the globe using real browsers...

Link Assistant - Get all SEO tools in one pack - download free edition of SEO PowerSuite and get top 10 rankings for your site on Google and other search engines!

Google Lighthouse - Lighthouse is an open-source, automated tool for improving the quality of web pages.

User reviews

Share your experience with using YSlow and GTmetrix. For example, how are they different and which one is better?

Post a review