📊 Analytics & Monitoring Comparison
Fathom Analytics vs PostHog
A detailed comparison to help you choose the right tool for your needs.
Last updated: 2026-01-31
Fathom Analytics
From $14/mo
Strengths
- + No cookies means no cookie consent banner — one less annoyance for visitors
- + Single dashboard shows everything you need in one screen
- + Script loads in under 1KB, so it does not slow your site down
Weaknesses
- − No free tier — $14/month minimum is a real cost for pre-revenue founders
- − Far fewer features than Google Analytics 4 (no funnels, no cohorts, no custom reports)
- − No event tracking on the lowest plan
PostHog
Free up to 1M events, then usage-based
Strengths
- + 1 million free events/month covers most startups for a long time
- + Replaces 4+ separate tools (analytics, session replay, feature flags, A/B testing)
- + Self-hosting option if you need to keep data on your own servers
Weaknesses
- − Steep learning curve — the sheer number of features can be overwhelming at first
- − Setting up meaningful dashboards takes time and thought
- − Self-hosted version requires real infrastructure to run
The verdict
Which one is right for you?
Choose Fathom Analytics if you want
- → No cookies means no cookie consent banner — one less annoyance for visitors
- → Single dashboard shows everything you need in one screen
Choose PostHog if you want
- → 1 million free events/month covers most startups for a long time
- → Replaces 4+ separate tools (analytics, session replay, feature flags, A/B testing)
In depth
About each tool
Fathom Analytics
Privacy-focused website analytics — no cookies, no banners, one simple dashboard
Fathom gives you the analytics you actually look at — visitors, page views, top pages, referrers — and nothing else. No cookie consent banners (because there are no cookies), no complex custom reports, no spending an hour configuring dashboards. Open it, see your numbers, close it.
Founded by Jack Ellis and Paul Jarvis (of Company of One fame). At $14/month with no free tier, you are paying for simplicity and privacy. If you need funnels, cohort analysis, or event tracking, PostHog or even GA4 gives you more. If you just want to know “how many people visited and where did they come from,” Fathom respects both your time and your visitors’ privacy.
PostHog
Product analytics, session replay, feature flags, and A/B testing — all in one open-source tool
PostHog is what you get when developers build analytics for developers. Instead of paying for Mixpanel (analytics) + FullStory (session replay) + LaunchDarkly (feature flags) + Optimizely (A/B tests), PostHog bundles all four into one platform. And the free tier is 1 million events per month — enough for most startups to run for months without paying.
The honest downside is complexity. PostHog can do a lot, and figuring out what to track and how to set up useful dashboards takes real effort. If you just want page views and referrer data, Plausible or Fathom is simpler. If you want to understand how users actually move through your product, PostHog is worth the setup time.
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