FullStory vs PostHog — Which One Wins?
A detailed, side-by-side comparison of FullStory and PostHog to help you pick the right tool for your workflow.
Quick Verdict
PostHog takes the lead with a 4.5 rating and is best for startups wanting product analytics, session replay, and feature flags in one open-source platform.. FullStory (4.3) is the better pick if you need enterprise digital teams needing session replay intelligence at scale..
Side-by-Side Comparison
| Criteria | FullStory | PostHog |
|---|---|---|
| Rating | ★★★★ 4.3(98) | ★★★★ 4.5(167) |
| Pricing Model | paid | open_source |
| Starter Price | Custom pricing | Pay-as-you-go above free limits |
| Free Tier | Yes | Yes |
| Platforms | web | web |
| Learning Curve | medium | medium |
| API Available | Yes | Yes |
| Best For | Enterprise digital teams needing session replay intelligence at scale. | Startups wanting product analytics, session replay, and feature flags in one open-source platform. |
| Verdict | situational | recommended |
Feature Checklist
| Feature | FullStory | PostHog |
|---|---|---|
| Autocapture (no manual tagging) | — | |
| AI frustration detection | — | |
| Session replay at scale | — | |
| Searchable sessions | — | |
| Heatmaps | — | |
| Product analytics | ||
| Session replay | — | |
| Feature flags | — | |
| A/B testing | — | |
| Surveys | — | |
| Self-hostable open source | — |
FullStory
Pros
- ✓AI automatically identifies frustration signals at scale
- ✓Autocapture means no manual event tagging
- ✓Enterprise-grade session replay and analytics
Cons
- ✕Premium enterprise pricing (typically $10K+/year)
- ✕Overkill for small to medium websites
- ✕Opaque pricing requires sales conversations
PostHog
Pros
- ✓All-in-one replaces 4-5 separate tools
- ✓Open source with free self-hosting
- ✓Cloud free tiers are genuinely generous
Cons
- ✕Individual analytics less powerful than dedicated Mixpanel/Amplitude
- ✕Session replay less polished than FullStory
- ✕Self-hosting requires infrastructure management
The Bottom Line
Both FullStory and PostHog are solid tools in the Analytics & Data space. PostHog edges ahead with a stronger overall rating (4.5 vs 4.3) and is the better choice for startups wanting product analytics, session replay, and feature flags in one open-source platform.. However, if you prioritize enterprise digital teams needing session replay intelligence at scale., FullStory is worth serious consideration. We recommend trying the free tier or trial of each before committing.