What is the difference between PostHog and Pirsch?

PostHog is best for Product teams that need analytics, session replay, and feature flags in one tool, while Pirsch is best for Privacy-focused teams wanting simple web analytics. PostHog starts at Free and Pirsch starts at $4/mo.

Is PostHog or Pirsch cheaper?

PostHog starts at Free and is free. Pirsch starts at $4/mo with a free tier.

Is there a free alternative to Pirsch?

Both PostHog and Pirsch offer free tiers.

PostHog vs Pirsch

PostHog is open-source product analytics suite with session replay, feature flags, A/B testing, and surveys, while Pirsch is privacy-friendly web analytics with no cookies, made and hosted in Germany. The biggest difference up front: PostHog is free, while Pirsch starts at $4/mo. PostHog is built for product teams that need analytics, session replay, and feature flags in one tool, whereas Pirsch targets privacy-focused teams wanting simple web analytics.

At a glance

	PostHog	Pirsch
Best for	Product teams that need analytics, session replay, and feature flags in one tool	Privacy-focused teams wanting simple web analytics
Starting price	Free	$4/mo
Free tier	✓	✓
Open source	✓	—
Free tier available	✓	✓
Open source	✓	—
A/B Testing	✓	—
Cookie-Free	—	✓
Events	—	✓
Feature Flags	✓	—
GDPR-Ready	—	✓
Product Analytics	✓	—
Server-Side	—	✓
Session Replay	✓	—
Surveys	✓	—

PostHog

Strengths

All-in-one: analytics, session replay, feature flags, A/B tests
Generous free tier (1M events/mo)
Open source and self-hostable
Strong developer experience

Weaknesses

Can be overwhelming — lots of features
Self-hosting requires significant infrastructure
UI has a learning curve
Some features less mature than best-in-class alternatives

Try PostHog → Full review

Pirsch

Strengths

Includes Cookie-Free as a core feature, purpose-built for analytics workflows
Includes GDPR-Ready as a core feature, purpose-built for analytics workflows
Free for 2.5K pageviews — generous enough for most small teams to get real work done
Includes server-side alongside the core feature set — fewer separate tools needed

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Data accuracy depends on tracking setup — misconfigured events give misleading results
Limited team/admin features if your organization eventually scales up

Try Pirsch → Full review

The bottom line

Pricing: PostHog is completely free, which makes it the obvious pick if budget is the top concern. Pirsch starts at $4/mo, but Free for 2.5K pageviews. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.

Feature gaps: PostHog offers A/B Testing, Feature Flags and Product Analytics that Pirsch lacks. Pirsch brings Cookie-Free, Events and GDPR-Ready that PostHog does not have.

Team fit: PostHog is geared toward any size teams, while Pirsch is aimed at small teams teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Open source: PostHog is open source, meaning you can self-host, audit the code, and avoid vendor lock-in. Pirsch is proprietary — you are trusting the vendor with your data and uptime.

Where each tool shines: PostHog's biggest strengths are: all-in-one: analytics, session replay, feature flags, a/b tests. generous free tier (1m events/mo). Pirsch's biggest strengths are: includes cookie-free as a core feature, purpose-built for analytics workflows. includes gdpr-ready as a core feature, purpose-built for analytics workflows.

Watch out for: With PostHog, users commonly note that can be overwhelming — lots of features. With Pirsch, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose PostHog if...

You need a tool built for product teams that need analytics, session replay, and feature flags in one tool
Budget is a hard constraint — PostHog is free, Pirsch is not
You need self-hosting, data sovereignty, or the ability to audit source code
You specifically need A/B Testing and Feature Flags
You care about generous free tier (1m events/mo)

Choose Pirsch if...

You need a tool built for privacy-focused teams wanting simple web analytics
You specifically need Cookie-Free and Events
You care about includes gdpr-ready as a core feature, purpose-built for analytics workflows
Your team size fits the small teams profile Pirsch is designed for
The free tier works for you: free for 2.5k pageviews