Sweet Upsell

Name: Sweet Upsell
Brand: Triangle Wave
Rating: 4.4 (17 reviews)

Pricing: From $29/month. Free trial available.
Rating: 4.4 (17)
Developer: Triangle Wave

Go beyond post checkout upsells!

Increase your revenue on autopilot with post-purchase upsells on the order confirmation page - without the need for custom work or flow interruptions! If you're not using post-purchase you’re leaving money on the table. The order confirmation page is valuable real estate where Sweet Upsell can boost your revenue and average order value. Sell in quantity, use custom cross-sells, automatic best sellers and product repeat. We use the native Shopify pages so can use the payment provider you want!

Power up your Order Status and Thank You pages with dynamic funnels
Works with almost anything (Airwallex, Klarna, Bancontact, nothing is too small)
Limited time offers, item repeat, AI and custom upsells

Languages

English

Works with

Customer accounts
Sofort
iDEAL
Multibanco
EPS payments
Blik
Airwallex

Pricing

Monthly

$29 / month

Zero friction post purchase upsells
Autopilot sales with dynamic upsells
No coding required
Great support

7-day free trial

Annual

$249.99 / year

Zero friction post purchase upsells
Autopilot sales with dynamic upsells
No coding required
Great support

7-day free trial

All charges are billed in USD. Recurring and usage-based charges are billed every 30 days.

Reviews (17)

Overall rating

4.4

Counts per rating level

88% of ratings are 5 stars
15
0% of ratings are 4 stars
0% of ratings are 3 stars
0% of ratings are 2 stars
12% of ratings are 1 stars
2

All reviews

Edited December 15, 2025

Only App we found that worked for our payment processor. Super convenient, took our AOV through the roof. The support is pretty good too, we were talking to a real person without any hassle.

luxyeon

United Arab Emirates

9 months using the app

August 15, 2025

I rarely leave negative reviews, but this customer support experience was unacceptable. We used the app for two years without issue, and then it suddenly stopped showing post-purchase. Instead of investigating or offering a solution, Jack from support gave vague, unhelpful replies and failed to address the problem. Messages went largely unanswered, and the overall attitude was poor — not how paying customers should be treated. I strongly recommend choosing a different app for your store.

Dulora

Hong Kong SAR

10 months using the app

Triangle Wave replied August 19, 2025

We’re sorry you felt let down. For anyone reading, the statement that our app “stopped showing post-purchase” isn’t accurate. Shopify's event logs and order history show the post-purchase offer remained active during the period mentioned and continued to display to customers, with impressions and conversions recorded. We’re happy to share what we can.

While providing technical support we also noted several overlapping discount rules and checkout customization from other apps, these can change which orders are eligible to see an offer. We shared guidance and offered direct collaboration.

As a courtesy while we looked into this, we refunded the last 3 months of your subscription.

We work hard to help every merchant succeed and are always happy to walk through discount settings and app logic. Please reach us at our support email on our app page with a few order numbers you believe didn’t see the offer, and we’ll provide a detailed audit and resolution.