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Statsig vs PostHog

Statsig logo

Statsig

Software

Unified platform for feature flags, A/B testing, and product analytics

From
Free
Rated
-
Full reviewWebsite
PostHog logo

PostHog

Software

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Statsig pro plan is limited to a single project, requiring Enterprise for multi-project support.; 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: Statsig covers Feature Flags, PostHog covers Product analytics.

Where they differ

Only the attributes on which Statsig and PostHog actually diverge.

Attributes where Statsig and PostHog differ
AttributeStatsigPostHog
Pricing modelfreemiumusage-based
Platformsweb, apiWeb, Ios, Android, Api
FoundedUnknown2020

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

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 Statsig

  • Feature Flags
  • Experimentation
  • Product Analytics
  • Session Replay
  • Web Analytics
  • Warehouse-Native Deployment
  • Role-Based Access & SSO

Only in PostHog

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

What people use each for

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

Statsig

  • Rolling out features gradually with kill switchesnot PostHog
  • Running A/B tests with statistical rigornot PostHog
  • Tracing metric regressions to specific releasesnot PostHog
  • Consolidating analytics and experimentation toolingnot PostHog
  • Warehouse-native experimentation for data teamsnot PostHog

PostHog

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

Where each one falls short

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

Statsig

  • Pro plan is limited to a single project, requiring Enterprise for multi-project support.
  • Overage pricing on the Pro plan can become costly for high-event-volume products.
  • Warehouse-native deployment and advanced access controls are gated behind custom Enterprise contracts.
  • Free tier session replay and analytics retention are capped, pushing active teams toward paid tiers quickly.

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

Statsig

Free
  • DeveloperFree
    • 2M events/month
    • Unlimited flag & config checks
    • 50,000 session replays/month
  • Pro$150/month
    • 5M events included, then $0.05 per 1K events
    • Advanced experimentation & analytics
    • Unlimited analytics retention
  • Enterprise$undefined/month
    • Volume-discounted event/experiment contracts
    • Warehouse-native deployment
    • SSO & role-based access 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 Statsig if

  • You need feature flags.
  • You want to start without paying.
  • You work on web, api.
  • You also want experimentation.
Statsig 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 Statsig or PostHog better?
Neither clearly leads. Statsig 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, Statsig or PostHog?
Statsig starts at Free and PostHog at Free.
Does Statsig or PostHog run on more platforms?
Statsig runs on web, api. PostHog runs on Web, Ios, Android, Api.
Can I use Statsig for free?
Both have a free tier, so you can try either at no cost before committing.
What is Statsig best used for?
Statsig is most often used for rolling out features gradually with kill switches, running a/b tests with statistical rigor, tracing metric regressions to specific releases, consolidating analytics and experimentation tooling. Of those, rolling out features gradually with kill switches and running a/b tests with statistical rigor are not what PostHog is typically brought in for.
What can Statsig do that PostHog cannot?
Statsig covers Feature Flags, Experimentation, Product Analytics, Session Replay. PostHog covers Product analytics, Session recording, Feature flags, A/B testing.

Answered from the vendors’ own pages

Statsig: What does Statsig cost?

Statsig offers a free Developer tier, a Pro tier at $150/month with 5M included events and $0.05 per 1,000 events after that, and custom Enterprise pricing based on event or experiment volume.

Source
Statsig: Is there a free plan, and what are its limits?

The free Developer plan includes 2M events per month, unlimited flag and config checks, 50,000 session replays per month, and 1-year analytics data retention with unlimited seats.

Source
Statsig: How is usage metered on Statsig?

Statsig meters billable events including exposures with Metric Lifts enabled, log events from SDKs or imports, ingested warehouse metrics, and custom metrics; disabled flag checks are not metered.

Source
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