Based on 2612 and 35 real audits
| Metric | Google Tag Manager | Stimulus | Winner |
|---|---|---|---|
| Performance | 41 | 42 | Stimulus |
| Accessibility | 88 | 90 | Stimulus |
| Best Practices | 86 | 90 | Stimulus |
| SEO | 91 | 92 | Stimulus |
| Security | 65 | 68 | Stimulus |
| TTFB | 402ms | 289ms | Stimulus |
| Composite | 73 | 75 | Stimulus |
Stimulus outperforms Google Tag Manager in 7 of 7 categories, with a stronger composite score (75 vs 73). Google Tag Manager leads in no categories.
Google Tag Manager doesn't clearly lead Stimulus in any category on the sampled sites — pick it based on developer experience, ecosystem, or existing team skills rather than the audit scores.
Choose Stimulus 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 2612 audited Google Tag Manager sites and 35 audited Stimulus 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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