Grain logomark
Honest comparison · Updated April 2026

Grain vs PostHog

PostHog is a Swiss Army knife for product teams with data engineers. Grain is for teams where the founder, PM, or marketer needs answers directly.

The 30-second honest answer
Pick PostHog if you want

A huge product-analytics toolbox — events, flags, replay, experiments, SQL — if you have the team to wire it up and maintain it.

Pick Grain if you want

An AI analyst that proactively investigates revenue leaks and writes the reports. No SQL, no data engineer.

They overlap on: Event tracking, funnels, session replay, heatmaps, feature flags, dashboards.

Feature matrix

What each tool ships today. No roadmap wishes.

Capability
PostHog
Grain
Open source
Self-hosted on enterprise
Self-hostable
Enterprise only
Cloud SaaS
Cookieless tracking
Recall
GDPR out of the box
AI analyst built-in
Basic Max AI
Kai (3 tiers)
Deep Investigation
Six-phase audit
Heatmaps
Session Replay
Mobile SDK
iOS + Android
Funnels / journeys
Basic
Tracks + attribution + p-values
Custom dashboards
WordPress / WooCommerce
Community
Native, server-side
BYOK AI
n/a
OpenAI, Gemini
Pricing
Usage-based, scales quickly
$29 → $299 flat · LTD via AppSumo

When PostHog is the better choice

  • You have a data team that writes SQL daily.
  • You want feature flags and experiments in the same tool.
  • You're willing to pay usage-based bills that scale with traffic.
  • You need a mature OSS ecosystem.

When Grain is the better choice

  • Your founder, PM, or marketer needs answers directly — no SQL.
  • You want flat, predictable pricing instead of per-event billing.
  • You want proactive AI investigation, not a tool that waits for a query.
  • You're on WordPress or WooCommerce and want native tracking.

Run both, no commitment

PostHog and Grain scripts coexist cleanly. Many teams use PostHog for flags/experiments and Grain for AI-led analysis. Email eray@grainql.com for a 90-day Growth-tier trial.

FAQ

Is Grain open source?

No, not in the next 12 months. Self-hosting is available on enterprise tier.

Does Grain track users across sites?

No. No cross-site tracking, no fingerprinting, no third-party cookies.

Can I export my data?

Yes. CSV from every view, plus the Grain Connector (in development).