Based on 3047 and 13 real audits
| Metric | Google Tag Manager | Issuu | Winner |
|---|---|---|---|
| Performance | 41 | 41 | Tie |
| Accessibility | 88 | 88 | Tie |
| Best Practices | 87 | 93 | Issuu |
| SEO | 92 | 91 | Google Tag Manager |
| Security | 67 | 63 | Google Tag Manager |
| TTFB | 433ms | 236ms | Issuu |
| Composite | 74 | 72 | Google Tag Manager |
Google Tag Manager outperforms Issuu in 3 of 7 categories, with a stronger composite score (74 vs 72). Issuu leads in best practices, TTFB.
Choose Google Tag Manager when your primary concern is security and SEO. Its audit data shows consistent strength in these areas across the sampled sites.
Choose Issuu when your primary concern is server response time and best practices. Its audit data shows consistent strength in these areas across the sampled sites.
Scores are medians across 3047 audited Google Tag Manager sites and 13 audited Issuu 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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