PostHog

posthog.com ↗

Product analytics, session replay, error tracking, and feature flags in one platform.

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SI Score: 80/100
Pricing: Not confirmed
Free plan: Not confirmed
Sign-up required: Not confirmed

Ask SI about PostHog

Answers use saved listing facts and recorded sources.

Homepage screenshot

SI REVIEWBased on the site's own pages, in a directory managed by people

What it does

PostHog ingests and stores product and company data, including analytics, session replays, errors, logs, and data from external sources. The data can be queried and acted on from a browser, editor, or terminal, including through the PostHog MCP and CLI. Listed products include Product Analytics, Session Replay, Error Tracking, Web Analytics, Feature Flags, Experiments, Surveys, Warehouse, CDP, Workflows, Logs, AI Observability, Endpoints, Tracing, Heatmaps, and Inbox. A free account can be created with an email address, and no credit card is required. Documentation and a demo are available.

Pricing is usage based with monthly free tiers. The site lists 1 million events per month for Product Analytics, 5,000 recordings per month for Session Replay, 1 million requests per month for Feature Flags, and 1 million rows per month for Warehouse, with stated per unit prices that decrease with volume. Setup can be done through a wizard, and an install command is given for the terminal. Docs cover installing PostHog, sending a first event, SDKs, frameworks, services, and guides. The site also lists a company handbook, changelog, and support with engineering backgrounds.

Best for

Product analyticsSession replayError trackingFeature flags

SI Score

80/100

#1 in Research & Data Analysis

Based on published information. No hands-on task test.

Method 2.0 · Published source review Assessed Oct 28, 2026Score ceiling for this evidence: 84/100.

Product usefulness 80

Evidence

PostHog's dated native page documents a complete product-data workflow: install with a wizard, ingest analytics/replay/error and business data, query it and review proposed improvements before shipping. The one-million-event monthly Product Analytics free tier and explicit human decision on changes give meaningful capacity and authority boundaries, independently of synthetic catalogue text.

Limits: Source-researched AI assessment reviewed by a separate native AI worker. No hands-on product test or human verification is claimed.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checks75/100

HTTPS: yes
Homepage answered with HTTP 200
Privacy policy link: not found
Terms link: not found
Contact or about page: found

We check that these pages exist, not what they say. Ownership and company details are not verified.

Checked Oct 18, 2026.

HTML accessibility checks67/100

Page language set: en
Mobile viewport: yes
Images with a text alternative: 4 of 75
Main heading (h1): yes

Automated checks on the homepage HTML only. This is not a full accessibility audit.

Checked Oct 18, 2026.

Homepage HTML response90/100

First byte after 36 ms
Homepage HTML loaded in 0.1 s
HTML size 1,680 KB

Measured once from our server. Images, scripts and your own connection are not included.

Checked Oct 18, 2026.

Trackers in homepage HTML100/100

No known third-party trackers in the homepage code.

Only the homepage HTML is checked. Trackers loaded later by scripts, and what the service does with your data, are not covered.

Checked Oct 18, 2026.

Page date hints90/100

No copyright year found on the page.
Server says last modified: Sun, 18 Oct 2026 06:01:56 GMT

A copyright year is a weak sign of upkeep. It does not prove the content is current.

Checked Oct 18, 2026.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

posthog.com/
- Product usefulness evidence
- Basic website checks (separate check)Checked Oct 18, 2026
- HTML accessibility checks (separate check)Checked Oct 18, 2026
- Homepage HTML response (separate check)Checked Oct 18, 2026
- Trackers in homepage HTML (separate check)Checked Oct 18, 2026
- Page date hints (separate check)Checked Oct 18, 2026

Checks without a source link

PricingUnknownChecked Oct 18, 2026
Free planUnknownChecked Oct 18, 2026
Sign-up requiredUnknownChecked Oct 18, 2026
PlatformsUnknownChecked Oct 18, 2026
APIUnknownChecked Oct 18, 2026
Open sourceUnknownChecked Oct 18, 2026

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