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Customer reviews: SellUp: Add ons & Cart Upsell

Develop by Shopify

Reviews (121)

Overall rating
4.4

What Merchants Think

Merchants have generally expressed positive feedback about "SellUp ‑ Upsell & Add ons," highlighting its ease of use and effectiveness in increasing sales. The app is appreciated for allowing easy customization of add-ons, catering well to individual business needs. Many users have experienced quick success with implementing upsells immediately after installation. The app is especially praised for its responsive and effective customer support, notably from Dan.

Key Strengths

  • Customizable add-on features per product
  • Easy to set up and user-friendly interface
  • Efficient in increasing average order value (AOV)
  • Responsive and helpful customer support, frequently mentioned by name (Dan)
  • Quick resolution of theme compatibility issues by support

Common Concerns

  • Challenges with third-party theme compatibility
  • Desire for bulk product addition functionality on product pages
  • A few isolated usability issues, such as difficulties in saving new upsells
  • Suggestions for additional features, like adding discounts to upsells

Final Thoughts

Overall, "SellUp ‑ Upsell & Add ons" has been well-received by merchants, proving to be a valuable tool in enhancing sales through upselling. While there are some minor limitations and room for feature improvements, the outstanding customer support and the app's effectiveness make it a strong choice for many businesses looking to boost their sales through upsell strategies.

Collory

Jan 24, 2026  on Shopify

Die Art der Abbuchung ist nicht transparent. Obwohl die App deaktiviert ist wurden innerhalb von 1h 300 Views erzeugt. Laut Entwickler wird nach Anzahl der Views abgerechnet. Für mich ist das fast Betrug und die App sollte als unseriös gemeldet werden.

Official KBeauty

Jan 22, 2026  on Shopify

We are not getting any upsell orders!!

Vintage Source

May 08, 2025  on Shopify

Can't even begin to test the interface out if I don't provide payment information? What?

SYNTH Carbon

Nov 02, 2024  on Shopify

There's no way to save a new upsell anymore.

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