| # | App | Category | Script KB (p50) | Script KB (p75) | Script requests (p50) | Stores |
|---|---|---|---|---|---|---|
| 1 | Postscript * | Email & SMS | 404 | 404 | 3 | 5,443 |
| 2 | Klaviyo | Email & SMS | 136 | 234 | 22 | 162,906 |
| 3 | Omnisend * | Email & SMS | 85 | 85 | 4 | 24,589 |
| 4 | Attentive | Email & SMS | 60 | 191 | 5 | 4,298 |
| 5 | Mailchimp | Email & SMS | 5 | 5 | 1 | 51,378 |
* Attribution domains not yet manually verified. Data: HTTP Archive mobile crawl, Sept 2026, store home pages.