Shopify integration hub
Checkout extension integration apps for Shopify
5 apps state on their Shopify listing that they work with Checkout extension. Grouped by category, ranked by the public formula. Developer spellings that resolved here: Checkout extension, Checkout Extension.
Checkout extension is itself on the Shopify App Store: Checkout Upsell — Addonn.
Apps naming it
5
Categories
4
Reviews across them
92
With a free plan
4
Upsell and cross-sell: 4 apps
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Post Purchase Upsell—ReSellBoost AOV by reconverting Thank You Page and Checkout Upsells | 5.0(72) | 72 | 3 | $0.99/month | No | 30 days | Yes | 2022 | Checkout extension, OpenAI, Post-purchase page +2 | Established |
| 2 |  AI Upsell & Cart ‑ WeUpsellIncrease AOV using new AI upsell, cart & post purchase... | 5.0(8) | 8 | 3 | $8/month | Yes | none | Yes | 2024 | Checkout extension, Delivery provider, payment modules +2 | Emerging |
| 3 |  SellMore Post Purchase UpsellLift AOV by 1-click upsell, thank you page & checkout... | 5.0(5) | 5 | 3 | $9.99/month | Yes | 14 days | No | 2021 | bundle app upsell, Checkout extension, checkout upsell +2 | Emerging |
| 4 |  Impulse ‑ Unified UpsellsDrive online & in-store revenue with smart upsells and insight | 5.0(2) | 2 | 0 | $29.99/month | Yes | 30 days | No | 2026 | Checkout extension | New |
Checkout - Other: 2 apps
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Post Purchase Upsell—ReSellBoost AOV by reconverting Thank You Page and Checkout Upsells | 5.0(72) | 72 | 3 | $0.99/month | No | 30 days | Yes | 2022 | Checkout extension, OpenAI, Post-purchase page +2 | Established |
| 2 | SellMore Post Purchase UpsellLift AOV by 1-click upsell, thank you page & checkout... | 5.0(5) | 5 | 3 | $9.99/month | Yes | 14 days | No | 2021 | bundle app upsell, Checkout extension, checkout upsell +2 | Emerging |
Cart customization: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | AI Upsell & Cart ‑ WeUpsellIncrease AOV using new AI upsell, cart & post purchase... | 5.0(8) | 8 | 3 | $8/month | Yes | none | Yes | 2024 | Checkout extension, Delivery provider, payment modules +2 | Emerging |
Legal: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  GARAN & EU Guarantee NoticeOfficial EU Warranty Notice & GARAN Guarantee Label 2025/1960 | 5.0(5) | 5 | 3 | $5.85/month | Yes | 14 days | No | 2026 | 24 official EU languages, Checkout extension, EU Directive +3 | New |
Integrations that co-occur
Other tools named on the same listings as Checkout extension.
- Post-purchase page 2
- OpenAI 1
- Product Recommendations API 1
- Upsell Cart Drawer—ShopCart 1
- Delivery provider 1
- payment modules 1
- Shiprocket 1
- Thank you page & Cart page 1
- bundle app upsell 1
- checkout upsell 1
Last updated Oct 23, 2026. Ratings and review counts are the values shown on each app's public listing. How the numbers are computed: methodology.