PostHog icon

PostHog

★★★★★ 4.5
VS

SpyFu

★★★★ 4.2
Feature PostHog SpyFu
Pricing Free / from $0/mo From $39/mo
Free Plan ✓ Yes ✗ No
Rating 4.5 / 5 4.2 / 5
Best For developers, startups, product-teams, privacy-conscious-companies ppc-managers, seo-professionals, agencies, competitive-analysts
Founded 2020 2006
Product Analytics
Session Replay
Feature Flags
Experiments
Surveys
Data Warehouse
Self Hosting
Competitor Keywords
Ppc Research
Backlink Analysis
Rank Tracking
Keyword Research
Domain Comparison

✓ PostHog Pros

  • All-in-one analytics replacing multiple tools
  • Generous free tier (1M events/month)
  • Self-hostable for full data control
  • Feature flags and experiments built-in

✗ PostHog Cons

  • Can be complex to set up properly
  • Self-hosting requires infrastructure maintenance
  • Less polished UI than Amplitude

✓ SpyFu Pros

  • Unlimited search results on all plans
  • Excellent competitor analysis
  • Historical data going back years
  • Good PPC research tools

✗ SpyFu Cons

  • Interface can be overwhelming
  • Data accuracy varies for smaller sites
  • Limited international data

The Verdict

PostHog is built for developers and startups, with a focus on product-analytics and session-replay. SpyFu targets ppc managers and seo professionals and leads with competitor-keywords and ppc-research.

On pricing, PostHog is the clear winner for budget-conscious users — starting at $0/mo compared to $39/mo for SpyFu. That $39/mo difference adds up quickly for growing teams.

PostHog has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. SpyFu requires a paid subscription from day one.

Feature-wise, PostHog offers broader built-in capabilities (7 features vs 6), while SpyFu takes a more focused approach — which can mean a simpler, faster onboarding experience.

Bottom line: PostHog has a slight overall edge — but if unlimited search results on all plans matters most to you, SpyFu may still be the right call.

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