Based on 2545 and 52 real audits
| Metric | Google Tag Manager | Lightbox | Winner |
|---|---|---|---|
| Performance | 40 | 39 | Google Tag Manager |
| Accessibility | 88 | 87 | Google Tag Manager |
| Best Practices | 86 | 82 | Google Tag Manager |
| SEO | 91 | 91 | Tie |
| Security | 65 | 65 | Tie |
| TTFB | 375ms | 463ms | Google Tag Manager |
| Composite | 73 | 73 | Tie |
Google Tag Manager outperforms Lightbox in 4 of 7 categories, with a stronger composite score (73 vs 73). Lightbox leads in no categories.
Choose Google Tag Manager when your primary concern is server response time and best practices. Its audit data shows consistent strength in these areas across the sampled sites.
Lightbox 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 2545 audited Google Tag Manager sites and 52 audited Lightbox 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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