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Technology · head to head

PostHog vs Postmark

PostHog logo

PostHog

Technology

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

From
Free
Rated
-
Full reviewWebsite
Postmark logo

Postmark

Marketing

No hidden fees, no guesswork. Just the features you need, at a price that makes sense

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: PostHog the free tier covers 1M events, 5K web session recordings and 2.5K mobile recordings per month before usage-based billing starts; Postmark free tier caps at 100 emails per month with no overages allowed

Where they differ

Only the attributes on which PostHog and Postmark actually diverge.

Attributes where PostHog and Postmark differ
AttributePostHogPostmark
Pricing modelusage-basedfreemium
PlatformsWeb, Ios, Android, ApiWeb
CategoryTechnologyMarketing
Founded2020Unknown

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 PostHog

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

Only in Postmark

Nothing recorded that PostHog does not also cover.

What people use each for

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

PostHog

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

Postmark

No use cases recorded yet. See the Postmark review.

Where each one falls short

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

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

Postmark

  • Free tier caps at 100 emails per month with no overages allowed
  • Basic plan ($15/mo) includes 10,000 emails then charges $1.80 per 1,000 extra; Pro and Platform tiers have their own lower per-1,000 overage rates ($1.30 and $1.20), so cost scales per email beyond the included volume
  • Custom high-volume pricing above the published tiers requires contacting sales

Pricing, plan by plan

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

Postmark

Free

No published plan breakdown. See the Postmark review.

Which should you pick?

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

Choose Postmark if

  • You want to start without paying.
Postmark review

Questions people ask

Is PostHog or Postmark better?
Neither clearly leads. PostHog starts at Free and Postmark at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PostHog or Postmark?
PostHog starts at Free and Postmark at Free.
Does PostHog or Postmark run on more platforms?
PostHog runs on Web, Ios, Android, Api. Postmark runs on Web.
Can I use PostHog for free?
Both have a free tier, so you can try either at no cost before committing.
What is PostHog best used for?
PostHog is most often used for product analytics, feature experimentation, user behavior tracking, a/b testing. Of those, product analytics and feature experimentation are not what Postmark is typically brought in for.
What can PostHog do that Postmark cannot?
PostHog covers Product analytics, Session recording, Feature flags, A/B testing.
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