posthog Review, Pricing & Features

PostHog review: open-source product analytics with session replay, feature flags and A/B testing. Compare pricing tiers and alternatives.

Category: Analytics
Pricing: Freemium, from Free (generous usage limits); paid plans are usage-based after free allowances
Verified: Not yet
Last updated: July 19, 2026
Founded: 2020
Headquarters: San Francisco, United States

Open Source

Overview

PostHog is an open-source, all-in-one product analytics platform that combines event tracking, session replay, feature flags, experimentation, surveys and a data warehouse in a single tool, aimed at engineering and product teams that want deep product insight without managing multiple separate SaaS subscriptions.

Founded in 2020 by James Hawkins and Tim Glaser and headquartered in San Francisco, PostHog has grown through Y Combinator and several venture funding rounds, including a Stripe-led Series D, into one of the most widely adopted open-source analytics platforms among startups and product-led companies.

Key Features

PostHog's core product analytics tracks user events, funnels, retention and trends, and integrates directly with session replay so teams can watch real user sessions tied to specific analytics events, plus feature flags and A/B testing for controlled experimentation and gradual rollouts.

Beyond analytics, PostHog includes surveys for collecting qualitative feedback, error tracking for catching application exceptions, a data warehouse for querying analytics data alongside external data sources, and AI-oriented observability features, all accessible from a single SDK and dashboard.

Pricing

PostHog offers a generous free tier with monthly allowances across its products, including roughly 1 million analytics events, 5,000 session replays, 1 million feature flag requests and 1,500 survey responses, usable with no credit card and one project with a year of data retention.

Beyond the free limits, PostHog bills on a usage-based, pay-as-you-go model with per-unit pricing that decreases at higher volumes, rather than fixed monthly subscription tiers; paid usage also unlocks additional projects, up to seven years of data retention, and email support.

Key Features

Product analytics — Track user events, funnels, retention and trends to understand how people use a product.
Session replay — Watch recordings of real user sessions linked directly to analytics events and error reports.
Feature flags — Roll out features gradually or to specific user segments with real-time flag toggling.
A/B testing and experimentation — Run controlled experiments tied directly to product analytics data for statistically valid results.
Surveys — Collect in-product qualitative feedback from users alongside quantitative usage data.
Error tracking — Capture and triage application exceptions in the same platform as product usage data.
Data warehouse — Query PostHog analytics data alongside external data sources like Stripe or a data warehouse via SQL.
Self-hosting option — Deploy PostHog on your own infrastructure as an open-source alternative to the managed cloud offering.

Pros & Cons

Pros

Generous, genuinely usable free tier that covers most early-stage products
Consolidates analytics, session replay, feature flags, experimentation and surveys in one tool
Open source with a self-hosting option for teams wanting full data control
Usage-based pricing scales down per unit at higher volumes rather than forcing large tier jumps
Backed by significant venture funding, including a Stripe-led round, supporting continued development

Cons

Usage-based pricing across many products can make total monthly cost harder to predict than a flat subscription
Self-hosting requires infrastructure management that the managed cloud avoids
Breadth of bundled features means some individual capabilities are less deep than best-of-breed point solutions
Learning curve to fully use the platform's many products (analytics, replay, flags, experiments, surveys, warehouse) together
Free tier data retention (1 year) is shorter than paid tier retention (7 years), which may matter for long-term analysis

Pricing

Free
Free N/A
Pay-as-you-go
Usage-based (from $0.00005/event) Monthly, metered

Frequently Asked Questions

Is PostHog free to use?

Yes, PostHog has a generous free tier with monthly allowances across analytics, session replay, feature flags and more, and PostHog states over 90 percent of companies use it for free.

Who founded PostHog?

PostHog was founded on January 23, 2020 by James Hawkins and Tim Glaser, who previously worked together at London startup Arachnys.

Is PostHog open source?

Yes, PostHog is open source and offers a self-hosting option in addition to its managed cloud platform.

How is PostHog priced?

PostHog uses usage-based pricing with free monthly allowances per product (events, replays, flag requests, etc.), after which metered per-unit pricing applies with volume discounts at scale.

What are PostHog's main competitors?

Mixpanel and Amplitude for product analytics, Google Analytics for web analytics, LaunchDarkly for feature flags, Hotjar and FullStory for session replay, and Optimizely for A/B testing.

Where is PostHog headquartered?

PostHog is headquartered in San Francisco, California.

Has PostHog raised venture funding?

Yes, PostHog has raised approximately $194M across multiple rounds, including a $70M Series D led by Stripe in 2024 and a $75M Series E in September 2025.

Does PostHog include session replay and feature flags?

Yes, both session replay and feature flags are built into the platform alongside product analytics, experimentation, surveys and a data warehouse.

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