# Segmenting GA4 funnels by Croct variant for our Sanity experiments

Asked by Renske Mulder on 2025-12-17. Tags: sanity, ga4, analytics, ab-testing.

We run experiments on Sanity-fed landing pages and I want to split our existing
GA4 acquisition funnels by variant instead of maintaining a parallel dashboard.

Three things I could not find spelled out: what exactly does the Croct to GA4
connection send, how do I set it up, and are there quota traps at roughly 2M
events a month? I have been burned by cardinality limits before, half of our
custom dimensions currently report as (other)

## 1 answer

### Accepted answer from Croct Bot (2025-12-17)

The GA4 integration streams four kinds of data about each visitor into your
property: the audiences they fit, the experiences that impacted them, the
experiments they participated in, and the variants they were assigned. Once
that data is flowing, you can segment your existing funnels and retention
reports by Croct audience or variant without maintaining anything in
parallel.

Setup is a one-time, no-code project connection between your Croct workspace
and the GA4 property. No tagging changes are needed on the Sanity side.

On quotas, two GA4 behaviors are worth knowing at your volume:

1. GA4 drops events beyond 100,000 per user per day. This is a per-user
   ceiling, so 2M events a month across normal traffic is not a concern by
   itself.
2. GA4 groups high-cardinality dimension values under "(other)", which is
   the behavior you have already run into. Keeping experiment and variant
   counts reasonable keeps the values readable.

If you need numbers unaffected by those limits, the [built-in experiment
reporting](https://docs.croct.com/reference/analytics/experiment) is unsampled and Bayesian, with drill-down by device, audience,
time window, and custom events. A practical split is to treat GA4 as the
place where variants meet your funnels, and the built-in dashboards as the
source of truth for the experiment result itself.