SellUp: Add‑ons & Cart Upsell vs Simply Cartbooster
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026 for SellUp, Oct 13, 2026 for Simply Cartbooster.
The short answer
- Only Simply Cartbooster lists a free plan. Paid plans start at $14.99/month for SellUp and $10/month for Simply Cartbooster.
- SellUp lists 22 features Simply Cartbooster’s listing doesn’t mention, including A/B testing, AI recommendations, Cart upsell.
Head to head
Cross-sell, Upsell, funnels, Add On, Recommendations & Cart.
- United States
- United Kingdom
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free Tier
- · AI On Page Upsell
- · Action Upsell
- · Analytics
- · Basic Support
- · Cart Upsell
- · Post Purchase
Getting Started
- · AI On Page Upsell
- · Action Upsell
- · Analytics
- · Cart Upsell
- · Post Purchase
- · Premium Support
Free Plan
- · 50 Upsell Orders/month
- · Create Discount on Upsell
- · Create Unlimited Upsell
Silver
- · 100 Upsell Orders/month
- · Create Unlimited Upsell
- · Discount on Upsell
GOLD
- · 500 Upsell Orders/month
- · Create Unlimited Upsell
- · Discount on Upsell
PLATINUM
- · Create Unlimited Upsell
- · Discount on Upsell
- · Unlimited Upsell Orders/month
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureLooking to maximize revenue? With SellUp, you can create precision based cross-sells, upsells, product accessories, shop the look & add-ons for your store. From the product page through to the cart & thank you page, you can offer the best upsell & product add-on flow throughout the customer journey. SellUp will match your stores design so upsells look seamless.
This is a simple application that will help you increase your revenue by offering targeted product offers. Simply Cartbooster will increase the average order values using specific product recommendations. Here, you offer more of what the customer is looking for and so provide a smooth and seamless shopping experience to them. This will ultimately lead to an increase in your store revenue.
- Create cross-sells, upsells and add-ons to increase revenue across your store
- Offer add ons and upsells throughout the customer journey
- Create One Check Upsells in 60 seconds. Sell more with SellUp
- Create a frequently bought together section to increase average order value
- You can easily customize all the upsell rules.
- You will get a product wise analysis regarding their sales.
- You can create attractive pop up upsells with variants.
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 |  SellUp | Simply Cartbooster |
|---|---|---|
| Detected stores | 691 | Not published |
| Net store change, 28 days | −14 | 0 |
| Stores added, 28 days | 14 | Not enough data |
| Big-brand share | 11% | Not enough data |
| Top store categories | Apparel & Accessories, Home & Garden, Health & Beauty | Not published |
| Top store countries | United States, United Kingdom, Australia | Not published |
Reviews
| Measure | SellUp | Simply Cartbooster |
|---|---|---|
| App Store rating | 4.4 ★ | Not published |
| App Store reviews | 132 | Not published |
| New reviews, 28 days | 0 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | SellUp | Simply Cartbooster |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $14.99/month | $10/month(ahead) |
| Longest free trial | Not listed | Not listed |
| Plans listed | 2 | 4 |
Listing
| Measure | SellUp | Simply Cartbooster |
|---|---|---|
| Shopify category rank | #248 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Apr 26, 2019 | Dec 12, 2022 |
| Languages | 1 | Not published |
| Developer | LAUNCHTIP | Lucent Innovation |
FAQ
SellUp and Simply Cartbooster: common questions
- Is SellUp or Simply Cartbooster cheaper?
- Only Simply Cartbooster lists a free plan. Paid plans start at $14.99/month for SellUp and $10/month for Simply Cartbooster. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- SellUp lists 22 the others don’t mention, such as A/B testing, AI recommendations, Cart upsell, Click-through rates. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- 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 8, 2026 for SellUp, Oct 13, 2026 for Simply Cartbooster; estimated figures are labeled.
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 8, 2026 for SellUp, Oct 13, 2026 for Simply Cartbooster. 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.