Based on 2706 and 204 real audits
| Metric | Google Tag Manager | jsDelivr | Winner |
|---|---|---|---|
| Performance | 41 | 40 | Google Tag Manager |
| Accessibility | 88 | 88 | Tie |
| Best Practices | 87 | 87 | Tie |
| SEO | 91 | 91 | Tie |
| Security | 66 | 66 | Tie |
| TTFB | 394ms | 453ms | Google Tag Manager |
| Composite | 73 | 73 | Tie |
Google Tag Manager outperforms jsDelivr in 2 of 7 categories, with a stronger composite score (73 vs 73). jsDelivr leads in no categories.
Choose Google Tag Manager when your primary concern is server response time and performance. Its audit data shows consistent strength in these areas across the sampled sites.
jsDelivr doesn't clearly lead Google Tag Manager in any category on the sampled sites — pick it based on developer experience, ecosystem, or existing team skills rather than the audit scores.
Scores are medians across 2706 audited Google Tag Manager sites and 204 audited jsDelivr 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 →
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