Based on 2764 and 46 real audits
| Metric | Google Tag Manager | USWDS | Winner |
|---|---|---|---|
| Performance | 41 | 43 | USWDS |
| Accessibility | 88 | 95 | USWDS |
| Best Practices | 87 | 89 | USWDS |
| SEO | 91 | 91 | Tie |
| Security | 66 | 67 | USWDS |
| TTFB | 403ms | 529ms | Google Tag Manager |
| Composite | 74 | 74 | Tie |
USWDS outperforms Google Tag Manager in 4 of 7 categories, with a stronger composite score (74 vs 74). Google Tag Manager leads in TTFB.
Choose Google Tag Manager when your primary concern is server response time. 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 2764 audited Google Tag Manager sites and 46 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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