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Funnelish - PostHog

Send Funnelish funnel events to PostHog

Q: How does Upstack identify users in PostHog?

Upstack assigns each visitor a consistent distinct_id that persists across sessions, devices and browsers when it can resolve the visitor’s identity. Anonymous visitors get a temporary ID that Upstack tries to merge once the visitor is identified.

Q: Will I see duplicate events if I also have PostHog installed via another method?

Possibly. If PostHog’s JavaScript snippet or another integration sends the same events, you may see duplicates, so disable overlapping event types in either Upstack or the other integration.

Q: Which events does PostHog receive?

PageView as $pageview, ViewContent as view_item, AddToCart as add_to_cart, InitiateCheckout as initiate_checkout and Purchase as purchase.

Q: Which customer parameters are sent to PostHog?

Each event carries Upstack’s resolved distinct_id, which persists across sessions, plus email when the visitor is identified, IP address, user agent and device details.

Q: How do I check that Funnelish events are reaching PostHog?

Visit your store, view a product or add to cart, and confirm the event appears in PostHog under Activity, Live Events.

Q: How long does it take to connect Funnelish to PostHog?

Most brands are live in under 20 minutes. Once Funnelish events reach Upstack, every destination receives the same resolved events, PostHog included.

Each event is resolved to a person against a 750M+ device graph before it reaches PostHog, so records and reporting reflect the person, not the device.

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US device IDs in the graph: 750M+
Match rate on events: 90%+
Identity window, per customer: Lifetime
Most brands are live: <20 min

How it flows

How a Funnelish event reaches PostHog. Tracked on the funnel page, resolved to a person, then sent.

01 Capture

Captured from Funnelish

Add the Upstack Pixel to your Funnelish funnels to track what shoppers do there. When Funnelish creates the order in Shopify, Upstack records it like any other Shopify order.

See the Funnelish integration

FunnelishWhat it sends

page / eventsfrom the Upstack Pixel in each funnel’s head
fbclid / gclid / ttclidclick IDs kept on the way to checkout
order_idthe Shopify order Funnelish creates
order sourceshows as Funnelish in Upstack reports

02 Understand

Resolved to one person before it leaves

Every Funnelish event is matched against a 750M+ device graph, so a phone browse and a desktop checkout resolve to one customer rather than two strangers.

How resolution works

Resolved before it is sent

IdentityMatched against a 750M+ device graph, so a phone browse and a desktop checkout resolve to one customer.
customer_typeNew or returning, resolved before send.
DeduplicationOne person, one record, across devices and identifiers.
Bot and fraud filteringAutomated traffic never becomes a contact.

A CRM is only as trustworthy as its worst duplicate. These controls exist so the record reflects the person.

03 Activate

Delivered to PostHog

Stream resolved product and commerce events into PostHog for analysis on a person, not a session.

See the PostHog integration

PostHogWhat it receives

distinct_idthe person, across devices
event name and propertiesfunnels and retention
$set person propertiesuser-level attributes

Which events reach PostHog

Each Upstack event is mapped to the PostHog event below before it is sent.

Upstack event	Sent to PostHog as
Page view	$pageview
Product view	view_item
Add to cart	add_to_cart
Checkout	initiate_checkout
Purchase	purchase

Each event carries Upstack’s resolved distinct_id, which persists across sessions, plus email when the visitor is identified, IP address, user agent and device details.

The catch

A funnel visit and the order it produced come from two systems: the funnel page and the Shopify order Funnelish creates.

Upstack records the order once per Shopify order ID, with Funnelish as its order source, and resolves the buyer against the same graph as the funnel visit.

Where to check in PostHogRecords you can audit

PostHog Activity

then check that a single person shows events from more than one device.

What changes

What changes when Funnelish feeds PostHog. Two gains on the PostHog side, two on the Funnelish side.

PostHog

Server-side delivery

Upstack always sends events to PostHog from its servers as well as through the PostHog snippet, so an event an ad blocker or browser privacy setting stops in the browser still arrives from the server.

PostHog

Identity-resolved events

Events sent to PostHog carry the resolved customer whenever Upstack can identify one, matched against a 750M+ device graph.

Funnelish

Funnel pages tracked

The pixel loads in the head of every funnel page, so visits and the events you configure are recorded on pages your theme never touches.

Funnelish

One setup, every destination

Connect Funnelish once and forward to every ad platform and email tool you run.

Setup

Live in under 20 minutes.

You need your PostHog Project API Key from Project Settings and the data region, US or EU, where your project is hosted.

Upstack dashboardExample

PostHog Destination Healthy

Read the full PostHog setup guide

01

Add the Upstack Pixel to each funnel

In Funnelish, add the Upstack Pixel snippet to each funnel as a tracking code placed with Append To Page Head. If the funnel links to Shopify, add the script that keeps click IDs and UTMs on the link.
02

Add the PostHog destination

Under Destinations, add PostHog with your Project API Key, which starts with phc_, and the Data Region (US or EU) that matches where your PostHog project is hosted.
03

Check Live Events in PostHog

Visit your store, view a product or add to cart, and confirm the event appears in PostHog under Activity, Live Events.

FAQ

Questions about Funnelish and PostHog.

How does Upstack identify users in PostHog?

Upstack assigns each visitor a consistent distinct_id that persists across sessions, devices and browsers when it can resolve the visitor’s identity. Anonymous visitors get a temporary ID that Upstack tries to merge once the visitor is identified.

Will I see duplicate events if I also have PostHog installed via another method?

Possibly. If PostHog’s JavaScript snippet or another integration sends the same events, you may see duplicates, so disable overlapping event types in either Upstack or the other integration.

Which events does PostHog receive?

PageView as $pageview, ViewContent as view_item, AddToCart as add_to_cart, InitiateCheckout as initiate_checkout and Purchase as purchase.

Which customer parameters are sent to PostHog?

Each event carries Upstack’s resolved distinct_id, which persists across sessions, plus email when the visitor is identified, IP address, user agent and device details.