PostHog vs Fathom: Analytics Comparison (2026)
An independent side-by-side comparison of PostHog and Fathom for analytics buyers — pricing, features, integrations, and how often each is cited by major AI engines.
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
- ✓Product Analytics: 1M events/mo free
- ✓Session Replay: 5K recordings/mo free
- ✓Feature Flags: 1M requests/mo free
- ✓Managed Warehouse: 1M rows/mo free
- ✓Usage-based pricing
- ✓No sales calls required
- ✓Generous free tiers
- ✓Single source of truth for customers
- ✓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
When to choose PostHog
Choose PostHog if your team prioritizes its strengths over Fathom's. Full guidance populates as PostHog's feature data is indexed.
When to choose Fathom
Choose Fathom if your team prioritizes its strengths over PostHog's. Full guidance populates as Fathom's feature data is indexed.
AI visibility profiles
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posthog.com
usefathom.com