Payments and checkout Shopify Prospect Lists for Ecommerce SaaS Sellers
For ecommerce SaaS sellers, use this page to find Shopify merchants already using related apps. StoreRadar tracks 12 payments and checkout apps. Shop Pay leads by store count, with 28,901 public Shopify stores.
Find verified founder emails among Shopify stores using payments and checkout apps for ecommerce SaaS sellers.
What this group shows
| Apps in this group | 12 |
|---|---|
| App with the largest store count | Shop Pay · 28,901 |
| App with the smallest store count | PayTomorrow · 15 |
| Apps with extra store details | 6 of 12 |
| Apps also found with another app | 2 of 12 |
| Last checked | 4 November 2026 |
Counts come from public store checks. One store can appear under more than one app.
How to use this page
Start with the app closest to your product. Add store type, catalog or country when you request a list.
If you sell checkout or payment tools, use this group to find stores using online payment options.
Open the app pages below when you need the count, observation date and any available breakdown. Keep the page date with anything you cite.
Apps with the largest store counts
| Rank | App | Stores found | Extra store details |
|---|---|---|---|
| 1 | Shop Pay | 28,901 | profile and same-store evidence |
| 2 | Afterpay | 6,827 | profile and same-store evidence |
| 3 | Klarna | 4,311 | profile details |
| 4 | Sezzle | 1,445 | profile details |
| 5 | Zip | 1,194 | profile details |
| 6 | Affirm | 243 | profile details |
| 7 | Laybuy | 160 | count only |
| 8 | Paidy | 56 | count only |
Apps are ordered by store count in the current StoreRadar snapshot.
Every app in this group
- Shop Pay · 28,901 stores · 4 November 2026
- Afterpay · 6,827 stores · 4 November 2026
- Klarna · 4,311 stores · 4 November 2026
- Sezzle · 1,445 stores · 4 November 2026
- Zip · 1,194 stores · 4 November 2026
- Affirm · 243 stores · 4 November 2026
- Laybuy · 160 stores · 4 November 2026
- Paidy · 56 stores · 4 November 2026
- Tamara · 50 stores · 4 November 2026
- Tabby · 48 stores · 4 November 2026
- Splitit · 26 stores · 4 November 2026
- PayTomorrow · 15 stores · 4 November 2026
Open the Payments and checkout category hub · Return to For ecommerce SaaS and integration sellers
Start with this audience
Start your next campaign with Shopify stores using payments and checkout apps.
After payment
Load the matching Shopify stores and export your campaign list.
Optional verified contact delivery for qualifying matches
How StoreRadar checks these stores
StoreRadar.co records the apps found on public Shopify stores in the 4 November 2026 check. The category label groups similar tools.
Read the methodology · Browse the dataset catalog · Return to app intelligence
Find verified founder emails among Shopify stores using payments and checkout apps for ecommerce SaaS sellers.
What you receive
Store-only rows use 1 credit each. Rows with a qualifying verified-contact package use 2 credits total each. A contact package qualifies only when a name, title and verified work email are all available.
Before export, your workspace shows the qualifying row count and exact credit total. You are charged only for qualifying rows delivered.