Softwr

E-Commerce · head to head

FullStory vs PostHog

FullStory logo

FullStory

E-Commerce

Digital experience intelligence platform

From
Free
Rated
-
Full reviewWebsite
PostHog logo

PostHog

Technology

The single platform to analyze, test, observe, and deploy new features

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: FullStory free tier limited to 30,000 sessions per month, no 5,000+ monthly active user sites; PostHog the free tier covers 1M events, 5K web session recordings and 2.5K mobile recordings per month before usage-based billing starts
  • They diverge on capability: FullStory covers Session replay, PostHog covers Product analytics.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which FullStory and PostHog actually diverge.

Attributes where FullStory and PostHog differ
AttributeFullStoryPostHog
Pricing modelquoteusage-based
PlatformsWeb, MobileWeb, Ios, Android, Api
CategoryE-CommerceTechnology
Founded20142020

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in FullStory

  • Session replay
  • Conversion funnels
  • User journey mapping
  • Error tracking
  • Frustration signals
  • Search functionality
  • Custom events
  • Jira

Only in PostHog

  • Product analytics
  • Session recording
  • Feature flags
  • A/B testing
  • SQL access
  • Data warehouse
  • Apps platform
  • Microsoft Teams

Both cover

  • Heatmaps
  • Slack
  • Segment
  • Zapier
  • SOC2
  • GDPR
  • HIPAA

What people use each for

The jobs each tool is most often brought in to do.

FullStory

  • User experience analysisnot PostHog
  • Bug reproductionnot PostHog
  • Conversion optimizationnot PostHog
  • Customer supportnot PostHog
  • Product developmentnot PostHog

PostHog

  • Product analyticsnot FullStory
  • Feature experimentationnot FullStory
  • User behavior trackingnot FullStory
  • A/B testingnot FullStory
  • Debug production issuesnot FullStory

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

FullStory

  • Free tier limited to 30,000 sessions per month, no 5,000+ monthly active user sites
  • Personal email addresses cannot be used for signup; business email domain required
  • Paid plan pricing not publicly listed, requires sales contact for quotes
  • Free plan has no email support, only community-based assistance
  • Mobile app analytics requires a separate add-on purchase

PostHog

  • The free tier covers 1M events, 5K web session recordings and 2.5K mobile recordings per month before usage-based billing starts
  • Accounts without a card on file are limited to 1 project; adding one raises it to 6
  • Data retention is 1 year until a card is added, which extends it to 7 years
  • Support is community-only until the account is on a paid plan
  • Error tracking is capped at 100K exceptions and surveys at 1500 responses per month on the free tier

Pricing, plan by plan

FullStory

Free
  • FreeFree
    • 1,000 sessions/month
    • 14-day data retention
    • Basic analytics
  • Business$undefined/month
    • Custom sessions
    • 3-month retention
    • Advanced analytics
  • Enterprise$undefined/month
    • Unlimited sessions
    • Custom retention
    • Advanced privacy controls

PostHog

Free
  • FreeFree
    • 1M events/month
    • 5K sessions/month
    • Unlimited users
  • Paid$undefined/month
    • $0.00031/event
    • $0.005/session
    • Advanced permissions
  • Enterprise$undefined/month
    • SAML SSO
    • Advanced security
    • Dedicated support

Which should you pick?

Choose FullStory if

  • You need session replay.
  • You want to start without paying.
  • You work on Web, Mobile.
  • You also want conversion funnels.
FullStory review

Choose PostHog if

  • You need product analytics.
  • You want to start without paying.
  • You work on Web, Ios, Android, Api.
  • You also want session recording.
PostHog review

Questions people ask

Is FullStory or PostHog better?
Neither clearly leads. FullStory starts at Free and PostHog at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FullStory or PostHog?
FullStory starts at Free and PostHog at Free.
Does FullStory or PostHog run on more platforms?
FullStory runs on Web, Mobile. PostHog runs on Web, Ios, Android, Api.
Can I use FullStory for free?
Both have a free tier, so you can try either at no cost before committing.
What is FullStory best used for?
FullStory is most often used for user experience analysis, bug reproduction, conversion optimization, customer support. Of those, user experience analysis and bug reproduction are not what PostHog is typically brought in for.
What can FullStory do that PostHog cannot?
FullStory covers Session replay, Conversion funnels, User journey mapping, Error tracking. PostHog covers Product analytics, Session recording, Feature flags, A/B testing. Both handle Heatmaps, Slack, Segment, Zapier.

Answered from the vendors’ own pages

FullStory: What does FullStory's free tier include?

30,000 sessions per month, 10 user seats, 5,000 server-side events per month, 1 year of session replay retention, and 1 year of product analytics retention. Session capture pauses when you exceed the monthly limit, though existing sessions remain accessible.

Source
PostHog: What does PostHog's free tier include per month?

PostHog free tier includes: 1M analytics events, 5K session replays, 1M feature flag requests, 100K error tracking exceptions, 1,500 survey responses, 1M data warehouse rows, 10K data pipeline events, 100K AI observability events, 500 PostHog AI credits, 10K workflow messages, and 10GB log ingestion. Source: https://posthog.com/pricing

Source
FullStory: What features are excluded from the free plan?

Dashboards, configurable form privacy, Go-Live functionality, Streams, client-side rate hooks, mobile app analytics, and StoryAI are not available on the free tier. Email support is also unavailable; only community-based help is provided.

Source
PostHog: How much data retention does PostHog provide on paid plans?

PostHog free tier provides 1-year data retention. Pay-as-you-go plans offer 7-year data retention across all projects, enabling longer historical analysis. Source: https://posthog.com/pricing

Source
FullStory: Can I use a personal email to sign up for FullStory's free plan?

No. FullStory requires a business email domain for signup; personal email services like Gmail cannot be used for free plan registration.

Source
PostHog: What percentage of PostHog users stay on the free tier?

PostHog states that 97% of companies use PostHog for free, indicating extensive free tier adoption. However, specific per-unit pricing rates for overages on paid plans are not published. Source: https://posthog.com/pricing

Source
FullStory: How does FullStory integrate with Slack?

FullStory's Slack integration allows individual users to send noteworthy sessions to Slack channels. Advanced and Enterprise plans can configure Alerts to receive notifications in Slack when user metrics exceed defined thresholds.

Source
PostHog: When does PostHog provide priority support on paid plans?

PostHog provides email or Slack support for accounts exceeding $2,000/month on pay-as-you-go plans. Specific response times and support SLAs are not detailed on their pricing page. Source: https://posthog.com/pricing

Source
FullStory: What analytics platforms does FullStory integrate with?

FullStory integrates with Segment, Mixpanel, Adobe Analytics, Google Analytics, Salesforce, HubSpot, and others. These integrations allow you to attach FullStory session URLs to events in your analytics platform for cross-platform correlation.

Source
Share

Related pages

More on FullStory

More on PostHog

Keep looking

Other head to heads