# Atrby vs PostHog

> PostHog is a broad product platform. atrby stays narrow on purpose: traffic, revenue and conversion, without feature flags or experiments to manage.

Canonical: https://atrby.site/compare/posthog
Last updated: 2026-10-26

## Side by side

Pricing and features, line by line.

### Pricing

| Capability | atrby | PostHog |
| --- | --- | --- |
| What you are billed on | Pageviews only. Events, goals, revenue and replays never count | Usage per product: events, recordings, flag requests and more |
| Entry price | $19 Starter, $39 Growth at 150k pageviews | Free up to 1M events a month, then from $0.00005 per event |
| Free trial | 14 days, no card | Free tier that resets every month, no card |
| Over your plan limit | Never locked. Moved up only after two months in a row over | Billed per unit, with optional billing limits |

### Revenue

| Capability | atrby | PostHog |
| --- | --- | --- |
| Payment processors | Stripe, Lemon Squeezy, Polar, Paddle, Dodo, Shopify, plus a payment API | Stripe only. Chargebee, Polar and RevenueCat listed as coming soon |
| Funnels | Every plan | Yes |

### Product

| Capability | atrby | PostHog |
| --- | --- | --- |
| Cookieless by default | Yes, with an optional Product mode per site | No, cookies by default |
| Session replay | 2,000 a month on Starter, 20,000 on Growth | 5,000 recordings free a month |
| AI traffic | AI referrals to revenue, plus which AI crawlers read your pages | Not listed |
| Data retention | 3 years on Starter, 5+ on Growth | 7 years on paid plans, 1 year free |
| API and AI tools | MCP, API and CLI | API and an official MCP server |
| Feature flags, experiments, surveys | No, on purpose | Yes |
| Open source | No, hosted only | Yes, MIT |

PostHog details come from posthog.com/llms.txt and posthog.com/pricing, checked on 24 Oct 2026. "Not listed" means we couldn't find it there, not that it's impossible. Prices in USD per month. If something is out of date, email hello@atrby.site and we'll fix it within a day.

## What you get with atrby

Only what it does today.

- **Revenue by source.** Stripe, Lemon Squeezy, Polar, Paddle, Dodo and Shopify by signed webhook. Each payment is matched to the visit that brought it.
- **Cookieless by default.** No cookie banner needed in the default mode. Visitor ids come from a salt that changes daily and is deleted.
- **AI traffic.** Visits and revenue from ChatGPT, Perplexity, Claude and Gemini, plus which AI crawlers read your pages.
- **Funnels and goals.** Ordered funnels per visit and goals on pages or events, with the revenue of visitors who converted.
- **Web vitals from real visits.** LCP, INP, CLS, FCP and TTFB measured by the same script. No extra tag.
- **Priced on pageviews only.** From $19 a month. Events, goals, revenue and crawler hits are never metered.
- **Never locked out.** Over your tier we keep collecting and the dashboard stays open. A 14-day trial needs no card.
- **Alerts and a weekly digest.** Revenue drops, traffic spikes and a broken install by email. A Monday summary of what changed.

We only list what atrby does. Check PostHog's own site for their current features and pricing.

## Run both side by side

Keep whichever tells you more.

### 01. Add atrby next to PostHog

One script tag in the head. It doesn’t touch PostHog, and both can run together.

```html
<script defer src="https://atrby.site/atrby.js" data-site="…"></script>
```

### 02. Connect your payments

One click for each processor. atrby pulls 90 days of payments on connect, so revenue by source fills in on day one.

### 03. Compare for 14 days

Look at both side by side. Remove PostHog only when the numbers line up, or keep both.

PostHog is a trademark of its owner. We are not affiliated.

## Related
- [Compare atrby with other analytics tools](https://atrby.site/compare)
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- [Atrby vs GA4](https://atrby.site/compare/ga4)