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FullStory vs Google Tag Manager

Based on 14 and 2504 real audits

View FullStory details | View Google Tag Manager details
MetricFullStoryGoogle Tag ManagerWinner
Performance2840Google Tag Manager
Accessibility9188FullStory
Best Practices8686Tie
SEO9391FullStory
Security6465Google Tag Manager
TTFB367ms372msFullStory
Composite7173Google Tag Manager
Performance
FullStory
28
Google Tag Manager
40
Accessibility
FullStory
91
Google Tag Manager
88
Security
FullStory
64
Google Tag Manager
65
SEO
FullStory
93
Google Tag Manager
91
Composite
FullStory
71
Google Tag Manager
73

FullStory and Google Tag Manager are closely matched, each leading in different categories. FullStory has a composite score of 71 while Google Tag Manager scores 73.

When to choose FullStory

Choose FullStory when your primary concern is server response time and accessibility. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Google Tag Manager

Choose Google Tag Manager when your primary concern is performance and security. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 14 audited FullStory sites and 2504 audited Google Tag Manager 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 →

FAQ

Which is faster, FullStory or Google Tag Manager?
Based on real BeaverCheck audits, Google Tag Manager sites score higher on Lighthouse performance (40 vs 28 on average).
Which has better security, FullStory or Google Tag Manager?
Google Tag Manager sites score higher on security analysis (65 vs 64 on average).
Which has better accessibility, FullStory or Google Tag Manager?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor FullStory (91 vs 88). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, FullStory or Google Tag Manager?
FullStory sites score higher on Lighthouse SEO signals (93 vs 91 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), FullStory or Google Tag Manager?
FullStory sites show lower Time to First Byte (367 ms vs 372 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose FullStory or Google Tag Manager for my website?
Both platforms have trade-offs. Google Tag Manager scores higher on overall composite score while FullStory may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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