Affirm pay‑over‑time messaging vs Klarna On‑Site Messaging
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 3, 2026.
The short answer
- Klarna On‑Site Messaging is detected on 7.5× as many Shopify stores as Affirm pay‑over‑time messaging: 24,113 vs 3,197 as of Nov 3, 2026.
- On the Shopify App Store: Affirm pay‑over‑time messaging 1.4 from 56 reviews and Klarna On‑Site Messaging 2.3 from 237 reviews.
- Klarna On‑Site Messaging lists 7 features Affirm pay‑over‑time messaging’s listing doesn’t mention, including Announcement bar, Banner position, Mobile responsive.
Head to head
- United States
- Canada
- Hong Kong
- United Kingdom
- United States
- Italy
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureThe Affirm Messaging app enables you to display a customer's estimated monthly or bi-weekly payment amount on product pages and at checkout. Reframing prices as a budget-friendly monthly payment can increase average order values. To get started, you can create a merchant account by going to the Affirm website and clicking the "For Business" link.
This app is for merchants with an active Klarna Payments integration. Note: this app will not add Klarna as a payment method. Use this app to boost your business with messaging that lets your shoppers know that Klarna is an available payment option throughout the entire shopping journey.
- Display a budget-friendly monthly or biweekly payment price for each item.
- Leverage Affirm messaging on your product and checkout pages, and more.
- Affirm supports the broadest range of cart sizes, and drives high AOVs
- Promote the availability of payment options like Klarna and increase sales.
- Customize and personalize your messaging to maximize conversions.
- Optionally extend order data sharing & prevent inventory oversells.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Affirm pay‑over‑time messaging |  Klarna On‑Site Messaging |
|---|---|---|
| Detected stores | 3,197 | 24,113(ahead) |
| Net store change, 28 days | +7 | −67 |
| Stores added, 28 days | 61 | 152(ahead) |
| Big-brand share | 15% | 18% |
| Top store categories | Apparel & Accessories, Home & Garden, Vehicles & Parts | Apparel & Accessories, Home & Garden, Health & Beauty |
| Top store countries | United States, Canada, Hong Kong | United Kingdom, United States, Italy |
Reviews
| Measure | Affirm pay‑over‑time messaging | Klarna On‑Site Messaging |
|---|---|---|
| App Store rating | 1.4 ★ | 2.3 ★(ahead) |
| App Store reviews | 56 | 237(ahead) |
| New reviews, 28 days | Not enough data | 3 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Affirm pay‑over‑time messaging | Klarna On‑Site Messaging |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | Not published | Not published |
Listing
| Measure | Affirm pay‑over‑time messaging | Klarna On‑Site Messaging |
|---|---|---|
| Shopify category rank | #15 | #24 |
| Shopify App Charts | #2 in Advertising - Other | #17 on the Shoplist 100 |
| Built for Shopify | No | No |
| Launched | Mar 25, 2020 | Jun 10, 2019 |
| Languages | 1 | 1 |
| Developer | Affirm | Klarna |
Switching movement
5 stores dropped one and added the other in the last 180 days
FAQ
Affirm pay‑over‑time messaging and Klarna On‑Site Messaging: common questions
- Which is more popular, Affirm pay‑over‑time messaging or Klarna On‑Site Messaging?
- Klarna On‑Site Messaging is detected on 7.5× as many Shopify stores as Affirm pay‑over‑time messaging: 24,113 vs 3,197 as of Nov 3, 2026.
- Which has better reviews, Affirm pay‑over‑time messaging or Klarna On‑Site Messaging?
- On the Shopify App Store: Affirm pay‑over‑time messaging 1.4 from 56 reviews and Klarna On‑Site Messaging 2.3 from 237 reviews.
- What features does each app list that the other doesn’t?
- Klarna On‑Site Messaging lists 7 the others don’t mention, such as Announcement bar, Banner position, Mobile responsive, Multi-announcement. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Are stores switching between Affirm pay‑over‑time messaging and Klarna On‑Site Messaging?
- 5 stores dropped one and added the other in the last 180 days. Which stores, and in which direction, is in Shoplist.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 3, 2026; estimated figures are labeled.
Keep comparing
More matchups
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 3, 2026. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.