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Google Tag Manager vs List.js

Based on 2504 and 13 real audits

View Google Tag Manager details | View List.js details
MetricGoogle Tag ManagerList.jsWinner
Performance4045List.js
Accessibility8879Google Tag Manager
Best Practices8691List.js
SEO9185Google Tag Manager
Security6565Tie
TTFB372ms474msGoogle Tag Manager
Composite7373Tie
Performance
Google Tag Manager
40
List.js
45
Accessibility
Google Tag Manager
88
List.js
79
Security
Google Tag Manager
65
List.js
65
SEO
Google Tag Manager
91
List.js
85
Composite
Google Tag Manager
73
List.js
73

Google Tag Manager outperforms List.js in 3 of 7 categories, with a stronger composite score (73 vs 73). List.js leads in performance, best practices.

When to choose Google Tag Manager

Choose Google Tag Manager when your primary concern is server response time and accessibility. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose List.js

Choose List.js when your primary concern is performance and best practices. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 2504 audited Google Tag Manager sites and 13 audited List.js sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

FAQ

Which is faster, Google Tag Manager or List.js?
Based on real BeaverCheck audits, List.js sites score higher on Lighthouse performance (45 vs 40 on average).
Which has better security, Google Tag Manager or List.js?
Google Tag Manager sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, Google Tag Manager or List.js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Google Tag Manager (88 vs 79). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, Google Tag Manager or List.js?
Google Tag Manager sites score higher on Lighthouse SEO signals (91 vs 85 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), Google Tag Manager or List.js?
Google Tag Manager sites show lower Time to First Byte (372 ms vs 474 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose Google Tag Manager or List.js for my website?
Both platforms have trade-offs. List.js scores higher on overall composite score while Google Tag Manager may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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