Fathom vs PostHog: Analytics Comparison (2026)
Fathom is suitable for users prioritizing privacy-focused analytics with flat-rate pricing and extensive site support. PostHog is suitable for users needing a comprehensive product analytics suite with free tiers for various features and usage-based pricing.
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
- ✓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
When to choose Fathom
You need a simple, privacy-centric analytics solution with unlimited sites, email reports, and data ownership, without the need for cookie banners.
When to choose PostHog
You need a product analytics platform with free tiers for events, session replays, feature flags, and a managed warehouse, with usage-based pricing and a focus on being a single source of truth for customer data.