Fathom vs FullStory: Analytics Comparison (2026)
Fathom and FullStory are both analytics platforms, but they differ in their pricing models, data retention policies, and available features. Fathom offers a single, privacy-focused plan with unlimited sites and data retention, while FullStory provides a free tier with session-based limits and advanced features accessible through paid plans.
AI Citation Scorecard
How often each is cited by major AI engines when buyers ask analytics questions. Last 90 days across ChatGPT, Perplexity, Gemini, Claude, and Copilot.
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
- ✓Up to 50 sites included
- ✓Ecommerce/event tracking included
- ✓Easy integration with all CMSs/frameworks
- ✓API access
- ✓Forever data retention
- ✓100% data ownership
- ✓No cookie banners required
- ✓Unlimited email reports
- ✓30,000 monthly sessions
- ✓12 months of analytics retention
- ✓Session Replay
- ✓Basic analytics
- ✓Debugging tools
- ✓Core capabilities for 10 users
When to choose Fathom
You require a privacy-focused analytics solution with unlimited site tracking, unlimited email reports, API access, and forever data retention, and do not require a free tier or live demos.
When to choose FullStory
You need a free analytics plan with session replay, basic analytics, debugging tools, and 12 months of data retention, and your usage is limited to 30,000 monthly sessions and 10 users.