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FullStory vs Google Tag Manager

Based on 15 and 2812 real audits

View FullStory details | View Google Tag Manager details
MetricFullStoryGoogle Tag ManagerWinner
Performance3041Google Tag Manager
Accessibility9188FullStory
Best Practices8687Google Tag Manager
SEO9391FullStory
Security6566Google Tag Manager
TTFB389ms408msFullStory
Composite7274Google Tag Manager
Performance
FullStory
30
Google Tag Manager
41
Accessibility
FullStory
91
Google Tag Manager
88
Security
FullStory
65
Google Tag Manager
66
SEO
FullStory
93
Google Tag Manager
91
Composite
FullStory
72
Google Tag Manager
74

Google Tag Manager outperforms FullStory in 4 of 7 categories, with a stronger composite score (74 vs 72). FullStory leads in accessibility, SEO, TTFB.

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 best practices. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 15 audited FullStory sites and 2812 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 (41 vs 30 on average).
Which has better security, FullStory or Google Tag Manager?
Google Tag Manager sites score higher on security analysis (66 vs 65 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 (389 ms vs 408 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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