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Eleventy vs Google Tag Manager

Based on 2 and 2933 real audits

View Eleventy details | View Google Tag Manager details
MetricEleventyGoogle Tag ManagerWinner
Performance6441Eleventy
Accessibility9788Eleventy
Best Practices8887Eleventy
SEO10092Eleventy
Security6567Google Tag Manager
TTFB399ms421msEleventy
Composite7674Eleventy
Performance
Eleventy
64
Google Tag Manager
41
Accessibility
Eleventy
97
Google Tag Manager
88
Security
Eleventy
65
Google Tag Manager
67
SEO
Eleventy
100
Google Tag Manager
92
Composite
Eleventy
76
Google Tag Manager
74

Eleventy outperforms Google Tag Manager in 6 of 7 categories, with a stronger composite score (76 vs 74). Google Tag Manager leads in security.

When to choose Eleventy

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

When to choose Google Tag Manager

Choose Google Tag Manager when your primary concern is security. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 2 audited Eleventy sites and 2933 audited Google Tag Manager 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 →

Small sample: one or both technologies have fewer than 10 audited sites. Treat these numbers as directional — medians stabilize around 20–30 audits per side.

FAQ

Which is faster, Eleventy or Google Tag Manager?
Based on real BeaverCheck audits, Eleventy sites score higher on Lighthouse performance (64 vs 41 on average).
Which has better security, Eleventy or Google Tag Manager?
Google Tag Manager sites score higher on security analysis (67 vs 65 on average).
Which has better accessibility, Eleventy or Google Tag Manager?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Eleventy (97 vs 88). 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, Eleventy or Google Tag Manager?
Eleventy sites score higher on Lighthouse SEO signals (100 vs 92 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), Eleventy or Google Tag Manager?
Eleventy sites show lower Time to First Byte (399 ms vs 421 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 Eleventy or Google Tag Manager for my website?
Both platforms have trade-offs. Eleventy scores higher on overall composite score while Eleventy 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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