swap_horiz Glowroot Alternatives

1

PageSpeed Insights

PageSpeed Insights is a free web analysis tool from Google that assesses a website’s loading speed across various device...

Free Google WebPageTest Speed Test

9.1 Excellent

2

Bundlephobia

Bundlephobia is a website diagnostic tool that analyzes the file size of a webpage’s assets – images, scripts, and style...

Developer Javascript Web Front End

8.5 Great

3

Sitespeed.io

Sitespeed.io is an open-source toolkit for measuring and improving website performance by analyzing various metrics like...

Performance Monitoring Open Source Self Hosted

8.2 Great

4

Blackfire.io

Blackfire.io is a free online tool that analyzes website loading speed by simulating real browser performance, providing...

Performance PHP Apm Profiling

8.2 Great

5

Lumar

Lumar is an open-source tool that analyzes website performance by measuring key metrics like First Contentful Paint, Lar...

Technical SEO Enterprise SEO Audit Crawler

7.9 Good

6

Bombardier

Bombardier is a website speed testing tool developed by Dareboost that analyzes a webpage’s performance across various m...

Open Source CLI Benchmark Go

7.8 Good

7

Percy

Percy is an open-source tool that analyzes the loading speed and performance of websites by simulating real browser beha...

SAAS Visual Testing Regression WebPageTest

7.7 Good

8

Test My Site (Think with Google)

TestMySite, part of Google’s Think With Google initiative, analyzes website loading speed and identifies technical issue...

Google Performance Mobile Legacy

7.6 Good

9

Uptrends Website Speed Test

Uptrends Website Speed Test is an online tool that measures the loading time and performance of websites by analyzing va...

Performance Monitoring Web WebPageTest

7.0 Good

10

Ghost Inspector

Ghost Inspector is a free, open-source browser extension that analyzes website performance by simulating a real mobile d...

Monitoring SAAS Browser Synthetic

7.0 Good

11

HetrixTools

HetrixTools is a free online website speed testing tool that measures website loading times and performance metrics like...

Monitoring SAAS Uptime Alerts

7.0 Good

12

Hyperping

Hyperping is an open-source tool that analyzes website performance by simulating multiple HTTP requests to measure serve...

Modern Monitoring Uptime Status Page

6.9 Fair

13

StatusGator

StatusGator is a free online tool that analyzes website loading speed across multiple global servers and reports the ave...

Monitoring SAAS Aggregator Status Page

6.9 Fair

14

Highlight.io

Highlight.io is a website speed testing tool that analyzes webpages using Lighthouse and PageSpeed Insights to provide d...

Monitoring Open Source Observability Rum

6.9 Fair

15

FusionReactor

FusionReactor is an open-source tool that analyzes website performance by simulating real browser behavior and measuring...

Monitoring SAAS Java Apm

6.9 Fair

16

Seobility

Seobility is a website speed testing tool that analyzes a webpage’s performance across multiple metrics like Core Web Vi...

Performance Monitoring SEO Audit Freemium

6.8 Fair

17

Sensu

Sensu is an open-source tool that analyzes website performance by measuring key metrics like First Contentful Paint, Lar...

Monitoring Open Source Developer Observability

6.8 Fair

18

Sitechecker

Sitechecker analyzes website loading speed across multiple global locations and browsers, providing detailed reports on...

Monitoring SEO SAAS Audit

6.7 Fair

19

Cachet

Cachet is an open-source tool that analyzes website performance by measuring key metrics like First Contentful Paint, La...

Communication Open Source Self Hosted Incident

6.7 Fair

20

Hardenize

Hardenize is a tool that analyzes websites to identify and prioritize performance bottlenecks stemming from server-side...

Monitoring SSL DNS WebPageTest

6.3 Fair