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Software Development · head to head

Langfuse vs PostHog

L

Langfuse

Software Development

Simple pricing for projects of all sizes

From
On request
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

  • Only PostHog has a free tier, so it costs nothing to try first.
  • Each has a real cost: Langfuse billing is metered per unit, where a unit is any trace, observation, or score sent to the platform; the free Hobby tier includes only 50,000 units per month before graduated per-unit charges apply, as of August 2026.; PostHog the free tier covers 1M events, 5K web session recordings and 2.5K mobile recordings per month before usage-based billing starts

Where they differ

Only the attributes on which Langfuse and PostHog actually diverge.

Attributes where Langfuse and PostHog differ
AttributeLangfusePostHog
Starting priceOn requestFree
Free tierNoYes
PlatformsWebWeb, Ios, Android, Api
CategorySoftware DevelopmentTechnology
FoundedUnknown2020

Identical on both: pricing model (usage-based), 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 Langfuse

Nothing recorded that PostHog does not also cover.

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.

Langfuse

No use cases recorded yet. See the Langfuse review.

PostHog

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

Where each one falls short

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

Langfuse

  • Billing is metered per unit, where a unit is any trace, observation, or score sent to the platform; the free Hobby tier includes only 50,000 units per month before graduated per-unit charges apply, as of August 2026.

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

Langfuse

On request

No published plan breakdown. See the Langfuse review.

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 Langfuse if

Nothing in the data separates Langfuse from PostHog on the points above - pick on price and on how each one feels to use.

Langfuse 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 Langfuse or PostHog better?
Neither clearly leads. Langfuse starts at On request and PostHog at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Langfuse or PostHog?
PostHog has a free tier; the other does not. Paid plans start at On request for Langfuse and Free for PostHog.
Does Langfuse or PostHog run on more platforms?
Langfuse runs on Web. PostHog runs on Web, Ios, Android, Api.
Can I use PostHog for free?
Yes. PostHog has a free tier, so you can try it without paying. Langfuse starts at On request.
What can Langfuse do that PostHog cannot?
PostHog covers Product analytics, Session recording, Feature flags, A/B testing.
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