Website speed test, DNS lookup service incl EDNS client subnet, fast geolocation for IP or hostname, HTTP response headers, FREAK attack tester and more.
Cost / License
- Free
- Proprietary
United StatesPlatforms
- Online
Yahoo! YSlow Alternatives
Yahoo! YSlow is described as 'YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. YSlow is a Firefox add-on integrated with the Firebug web development tool' and is an app in the web browsers category. There are more than 10 alternatives to Yahoo! YSlow for a variety of platforms, including Web-based, SaaS, Google Chrome, Mozilla Firefox and Wordpress apps. The best Yahoo! YSlow alternative is Google Lighthouse, which is both free and Open Source. Other great apps like Yahoo! YSlow are GTmetrix, Screpy, PageSpeed Insights and WebPageTest.
Alternatives list
SpeedVitals is a website performance evaluation tool for improving Core Web Vitals. SpeedVitals uses Lighthouse to measure the Lab Data and Chrome's User Experience API to measure Field Data. It has features like Multi-Device & Multi-Location Testing, Waterfall Charts...
Cost / License
- Free
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
+5
SpeedVitals is the most popular SaaS alternative to Yahoo! YSlow.
- SpeedVitals is Free and Proprietary
Speedrank monitors the performance of your website in the background. It displays Lighthouse reports over time and delivers recommendations for improvement. Speedrank is a paid product with 14-day-trial.
Cost / License
- Freemium (Subscription)
- Proprietary
Platforms
- Online
MachMetrics continually monitors the speed of your website. So you know exactly how your pages are performing throughout the day, around the world, and on various devices
Vita - Lighthouse alternative for iOS Safari. Vita is a Safari extension for iOS that measure site's Core Web Vitals.
Cost / License
- Freemium (Subscription)
- Proprietary
Platforms
- iPhone
- iPad
+5
Vita is the most popular iPhone & iPad alternative to Yahoo! YSlow.
- Vita is Freemium and Proprietary
It costs a lot to have a slow website. Stop gambling your users will endure slow pages. Start running performance regression now!.
Cost / License
- Freemium (Subscription)
- Proprietary
Platforms
- Software as a Service (SaaS)
Free, professional-grade Website Speed Test with unique Video Visualization and Actionable Recommendations for Core Web Vitals (LCP, INP, CLS).
Cost / License
- Free
- Proprietary
Platforms
- Online
+3
Analyze and manage your website's performance, SEO, accessibility, best practices, PWA and more using Pagespeed + Lighthouse.
Cost / License
- Freemium (Subscription)
- Proprietary
Platforms
- Online
- Slack
- Software as a Service (SaaS)
- Wordpress
+1
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