Shopify stores with Postscript detected but Klaviyo not detected

StoreRadar observed 1,241 stores in a population of 300,332 on 17 October 2026.

Buyer question

Which Shopify stores show Postscript while Klaviyo is not detected, and how does this observed cohort divide by vertical for target-audience mapping?

This research is intended to compare same-category Shopify store cohorts where Postscript was observed and Klaviyo was not detected for integration, extension, or competitor-campaign research.

1,241

Observed stores in the Postscript detected; Klaviyo not detected cohort · population denominator 300,332 · snapshot 17 October 2026

1,241 of 2,288 stores with a public Postscript signal had no detected Klaviyo signal (54.2%) in the same snapshot. Among 1,231 stores with a known catalog size, the largest reported group was 1–9 products (376).

A missing public signal does not prove the excluded app is absent, incompatible, or unwanted.

Snapshot takeaways

Among 2,288 stores with a public Postscript signal, 1,047 also showed a public Klaviyo signal and 1,241 did not show it (54.2% of the Postscript signal cohort).
Largest recorded catalog size group: 1–9 products, 376 of 1,231 known values (30.5%).
Largest recorded vertical group: Streetwear, 67 of 445 known values (15.1%).
Largest recorded country group: AU, 54 of 138 known values (39.1%).

These comparisons use only the dated aggregate values shown below.

Signals and cohort

Signal	Observed evidence
Postscript	2,288 stores with a public signal
Klaviyo	1,047 of 2,288 stores with the installed signal also showed this public signal
All cohort conditions	1,241 stores

How big are their product lists?

Known values for 1,231 of 1,241 cohort stores.

Observed group	Stores	Share of known values
1–9 products	376	30.5%
10–49 products	373	30.3%
200+ products	256	20.8%
50–199 products	226	18.4%

What do these stores sell?

Known values for 445 of 1,241 cohort stores.

Observed group	Stores	Share of known values
Streetwear	67	15.1%
Womenswear	62	13.9%
Skincare	28	6.3%
Menswear	27	6.1%
Fine Jewelry	24	5.4%

Where are these stores?

Known values for 138 of 1,241 cohort stores.

Observed group	Stores	Share of known values
AU	54	39.1%
CA	42	30.4%
US	35	25.4%
BR	5	3.6%
IN	2	1.4%

What the observation means

StoreRadar detected a public Postscript signal on these stores. A public Klaviyo signal was not detected in this filtered cohort. This is a detector non-observation; it does not prove the excluded app is absent or incompatible.

Counts describe public storefront observations in a dated snapshot. They can change as storefronts and their visible signals change.

Start with this audience

Use these observed storefront signals as a starting cohort, then choose the catalog, country and offer filters that fit your campaign.

SELECTED AUDIENCE

Postscript detected; Klaviyo not detectedThe installed app and non-detection conditions on this page are selected for your campaign.

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