VS Code
CodePen
GitHub
Node.js
RegExr
JSFiddle
CodeSandbox
Free ebook for the JS Beginners

GA4 Auditor
AnalyticsPulse.ai
ASG Audit & Analytics Services
tagstack.io
Audit your GA4 and Google Tag Manager setup in minutes. Get a scored A–F report across consent, data quality and conversion integrity, plus a client-ready export.
Which is more popular?
Based on our record, Eloquent JavaScript seems to be more popular. It has been mentioned 218 times since March 2021.
Website, pricing, platforms and company facts side by side.
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EJS
Eloquent JavaScript
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| Website | eloquentjavascript.net | trackingauditor.io |
| Pricing | ||
| Company | — | Startup from the United Kingdom · 1 - 9 employees |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Eloquent JavaScript yet.
Tracking Auditor is an automated audit tool for Google Analytics 4 and Google Tag Manager. It connects to your GA4 property and GTM container read-only, analyses the live setup against 30 days of real traffic data, and grades it A to F across five weighted dimensions: consent architecture, GTM...
What each product offers, as listed by its team.

Possible disadvantages
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An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
Overall verdict
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Walkthroughs and reviews on video.
Eloquent JavaScript A Modern Introduction to Programming 3rd Edition by Marijn Haverbeke review
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How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing Eloquent JavaScript and Tracking Auditor.
Tracking Auditor's answer:
It audits the whole tracking stack in one scored pass. Most tools check one layer: a tag scanner checks what fires, a consent tool checks the banner, GA4 add-ons check events. Tracking Auditor connects to GA4 and Google Tag Manager together, cross-references them against 30 days of real traffic data, and grades the setup A to F across five weighted dimensions: consent, GTM governance, GA4 event quality, cookies and conversion integrity. That cross-referencing catches the problems single-layer tools miss, like a key event with no working tag behind it, or a purchase event counted twice.
Tracking Auditor's answer:
The enterprise tools in this space (ObservePoint, TagInspector) start at hundreds to thousands per month and are built for compliance teams. Tracking Auditor produces a comparable audit in about two minutes for £120, or unlimited audits at £199 a month, and the output is built to be handed to a client: plain-English findings, a prioritised fix plan, and white-label Google Doc and Sheet exports. The first audit preview is free with no card, so you can see your grade before paying anything.
Tracking Auditor's answer:
Digital marketing agencies and consultants who audit client GA4 and GTM accounts, and in-house marketing or analytics teams who want an independent check on their own setup. Typical trigger moments: taking over a new client account, a site rebuild, a consent banner change, or numbers that stopped matching the order system.
Tracking Auditor's answer:
It came out of agency work. Auditing a client's GA4 and GTM setup by hand takes the better part of a day, the checklist lives in someone's head, and the same problems come up every time: tags firing before consent, duplicate tracking, conversions that quietly stopped recording. Tracking Auditor turns that manual process into a repeatable, scored audit so the finding-and-explaining part takes minutes and the time goes into fixing things instead.
Tracking Auditor's answer:
Next.js on Vercel, with the official Google Analytics and Tag Manager APIs for read-only data access, Anthropic's Claude for generating the written findings and fix plans, Postgres for audit history, and Stripe for billing.
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Recommendations tracked on public social media and blogs since March 2021.

If you haven’t read Eloquent JavaScript , go check it out. It’s one of my all-time favourite programming books — hands down. - Source: dev.to / about 1 year ago
Videos, blogs, text-based teachings, YouTube project-based learning, books, and the like are all examples of various methods and mediums of acquiring skills, especially in the software engineering industry. As I continue to navigate... - Source: dev.to / almost 2 years ago
Seconded. I won't recommend it and no one I know has recommended it for a decade. It's hard for someone who doesn't know JS to know which parts has changed and is no longer the way to do things. https://github.com/getify/You-Dont-Know-JS... - Source: Hacker News / about 2 years ago
Tracking Tracking Auditor since Jul 2026.
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