Based on 3047 and 47 real audits
| Metric | Google Tag Manager | USWDS | Winner |
|---|---|---|---|
| Performance | 41 | 43 | USWDS |
| Accessibility | 88 | 95 | USWDS |
| Best Practices | 87 | 89 | USWDS |
| SEO | 92 | 91 | Google Tag Manager |
| Security | 67 | 67 | Tie |
| TTFB | 433ms | 519ms | Google Tag Manager |
| Composite | 74 | 74 | Tie |
USWDS outperforms Google Tag Manager in 3 of 7 categories, with a stronger composite score (74 vs 74). Google Tag Manager leads in SEO, TTFB.
Choose Google Tag Manager when your primary concern is server response time and SEO. Its audit data shows consistent strength in these areas across the sampled sites.
Choose USWDS when your primary concern is accessibility and performance. Its audit data shows consistent strength in these areas across the sampled sites.
Scores are medians across 3047 audited Google Tag Manager sites and 47 audited USWDS 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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