FEATURE
FATHOM
FULLSTORY
OVERALL_SCORE
21.5/50
24/50
API_QUALITY
GOOD ███░
EXCELLENT ████
API_SCORE
8/10
8/10
GTM_RELEVANCE
13.5/20
16/20
CATEGORY
ANALYTICS & DATA
ANALYTICS & DATA
PRICING
PAID
PAID
FREE_TIER
[---]
[---]
REST_API
[YES]
[YES]
WEBHOOKS
[---]
[YES]
GRAPHQL
[---]
[---]
OAUTH
[---]
[YES]
COMPLEXITY
HARD
MEDIUM
LEARNING
EASY
MEDIUM
WEBHOOK_REL
GOOD
EXCELLENT
// VERDICT
OVERALL_SCORE:FULLSTORY
API_QUALITY:TIE
GTM_RELEVANCE:FULLSTORY
EASE_OF_USE:FULLSTORY
VALUE (FREE):TIE
Strengths & Weaknesses
Fathom
Exceptionally lightweight script (under 1KB) that doesn't impact page load performance or SEO scores
No cookie banners required—fully GDPR, CCPA, and PECR compliant out of the box
Lifetime data retention with 100% data ownership and unlimited exports
Clean, intuitive dashboard that displays key metrics instantly without complexity or learning curve
Limited event tracking capabilities compared to full-featured analytics platforms like GA4 or Mixpanel
No user-level attribution or individual session replay—purely aggregate data
Higher cost per pageview compared to free alternatives, especially for high-traffic sites
Fullstory
Fullcapture automatically records all user interactions retroactively without manual event instrumentation, saving significant engineering time
StoryAI proactively surfaces insights and opportunities from behavioral data without requiring manual queries or analysis
Session replay with pixel-perfect playback provides deep context for understanding user friction and support issues
Fullstory Anywhere enables real-time behavioral data streaming to external systems for personalization and activation
Enterprise-focused pricing can be prohibitively expensive for startups and small businesses without high session volumes
Data capture approach may raise privacy concerns and requires careful configuration to exclude sensitive information
Learning curve can be steep for teams without prior analytics platform experience or dedicated analysts