2,087 Shopify stores currently have SellUp: Add ons & Cart Upsell installed, representing 0.1% of all active Shopify stores.
At a glance: SellUp: Add ons & Cart Upsell is the #463 most-installed Shopify app of the 4,191 with active installs, and #13 of 152 in Upsell and cross-sell. It is most often installed alongside Kartify ‑ Cart Banner & Terms and Klaviyo: Email Marketing & SMS. Its largest market is United States (38% of its stores).
SellUp: Add ons & Cart Upsell is installed on 2,087 of the 2,136,170 active Shopify stores worldwide tracked by StoreCensus. This makes it a notable player in the Upsell and cross-sell category.
Unlike the Shopify App Store's historical download counts, our data reflects current active installations. We detect SellUp: Add ons & Cart Upsell through storefront signature analysis across millions of stores, providing accurate real-time adoption metrics that matter for market analysis and competitive intelligence.
Over the past 30 days, SellUp: Add ons & Cart Upsell has lost 60 net installs, representing a -2.8% change from 2,147 installs. The 90-day trajectory shows decline of 124 installs (-5.6%).
Year-over-year, SellUp: Add ons & Cart Upsell has declined by 13.9%, moving from 2,423 installs to 2,087.
SellUp: Add ons & Cart Upsell shows strong adoption among established businesses, with 100% of users operating stores generating over $100K annually. The platform attracts a balanced mix across revenue tiers, though 0% of stores fall under $50K in annual revenue, indicating accessibility for emerging brands. The 20% penetration among $1M+ stores demonstrates enterprise-level trust, where merchants typically maintain complex tech stacks and face high switching costs.
| Revenue Tier | Stores | Percentage |
|---|---|---|
| $1M – $10M | 29 | 1.4% |
| $100K – $1M | 366 | 18.3% |
| <$100K | 1,610 | 80.3% |
Home & Garden leads adoption at 15%, followed by Fashion & Apparel at 11% and Sports & Outdoors at 10%. Together, these three verticals represent over half of SellUp: Add ons & Cart Upsell's install base. This concentration reflects industries where email marketing drives significant repeat purchase revenue through seasonal campaigns, product launches, and loyalty programs that benefit from sophisticated segmentation and automation capabilities.
38% of SellUp: Add ons & Cart Upsell stores are in United States, in line with its 34% share of all Shopify stores. 12% of SellUp: Add ons & Cart Upsell stores are in United Kingdom, more than its 8% share of all Shopify stores. 11% of SellUp: Add ons & Cart Upsell stores are in Canada, more than its 6% share of all Shopify stores.
Stores using SellUp: Add ons & Cart Upsell typically build comprehensive retention-focused tech stacks. 99% also use Kartify ‑ Cart Banner & Terms for cart customization, while 28% pair it with Klaviyo: Email Marketing & SMS for email marketing. The 28% overlap with Judge.me Product Reviews App indicates merchants unifying customer communication across email, SMS, and support channels. This pairing pattern reveals stores prioritizing customer lifetime value optimization over one-time acquisition, with integrated tools for reviews, loyalty, and recurring revenue.
SellUp: Add ons & Cart Upsell competes in the Upsell and cross-sell category with 2,087 installs, compared to PageFly ✦ AI Page Builder's 63,924.
| App | Installs | Market Share |
|---|---|---|
| PageFly ✦ AI Page Builder | 63,924 | 11.3% |
| Kaching Bundles App & Upsells | 38,800 | 6.9% |
| Bundler » Product Bundles App | 32,221 | 5.7% |
Install data shows market position by adoption — but organic discoverability is another dimension. See which keywords SellUp: Add ons & Cart Upsell ranks for in App Store search to understand its full competitive footprint.
As of October 21, 2026, 2,087 Shopify stores have SellUp: Add ons & Cart Upsell installed, representing 0.1% of all active Shopify stores tracked by StoreCensus.
SellUp: Add ons & Cart Upsell has lost 60 net installs over the past 30 days (-2.8% change) and lost 124 installs over 90 days (-5.6% change). Year-over-year growth is -13.9%.
SellUp: Add ons & Cart Upsell is most popular in Home & Garden (14.8% of users), followed by Fashion & Apparel (11.4%). The app is used across stores of all sizes.
StoreCensus updates SellUp: Add ons & Cart Upsell installation data weekly through continuous monitoring of 2,136,170+ active Shopify stores. We detect installations through storefront signature analysis, providing accurate current install counts rather than historical download numbers.
SellUp: Add ons & Cart Upsell holds a 0.1% market share in its category. To see how it compares to direct competitors, check the Market Position section on this page which shows install counts and market share for similar apps in the same category.
With 2,087 active installations, SellUp: Add ons & Cart Upsell is a growing solution. Consider the 90-day growth trend (-5.6%) to understand momentum, and review the industry breakdown to see if stores similar to yours use it. Always test on a development store first and check recent app store reviews for current user sentiment.
2,087 Shopify stores currently use SellUp: Add ons & Cart Upsell. This data is updated weekly based on continuous monitoring of 2,136,170+ active Shopify stores.
Build targeted prospect lists of stores using SellUp: Add ons & Cart Upsell. Filter by revenue, industry, country, and more.
SellUp: Add ons & Cart Upsell is installed on 2,087 of the 2,136,170 Shopify stores tracked by StoreCensus, representing a 0.10% market penetration rate. It is categorized under Upsell and cross-sell.
SellUp: Add ons & Cart Upsell is installed on 2,087 Shopify stores, representing 0.1% of all tracked stores. This adoption level reflects a focused user base within a specific merchant segment.
Over the past 90 days, SellUp: Add ons & Cart Upsell has lost 124 net installs (-5.6%). Negative 90-day momentum may reflect competitive pressure or merchant churn within the category.
SellUp: Add ons & Cart Upsell is frequently installed alongside Kartify ‑ Cart Banner & Terms and Klaviyo: Email Marketing & SMS, suggesting merchants use it as part of a broader technology stack rather than as a standalone solution.
Interpretations are based on observed StoreCensus data. Directional observations only - not financial or business advice.
Based on StoreCensus tracking of 2,136,170 active Shopify stores.
How SellUp: Add ons & Cart Upsell relates to other apps in the Shopify ecosystem, based on co-installation patterns and category relationships.
Apps commonly paired with SellUp: Add ons & Cart Upsell
Apps merchants consider as alternatives
Co-installation data is derived from observed patterns across StoreCensus-tracked stores. Overlap percentages indicate the share of SellUp: Add ons & Cart Upsell users who also have the listed app installed.
Data is refreshed on a weekly basis and reflects observed platform activity across active ecommerce stores. StoreCensus detects app and plugin installations through storefront signature analysis including JavaScript signatures, API calls, and HTML markers — measuring current active installations, not historical download counts.
StoreCensus continuously discovers and indexes active Shopify storefronts globally. Our crawler identifies 2,136,170+ live stores through domain analysis, platform signals, and third-party data sources.
App and plugin installations are detected through storefront signature analysis — including JavaScript bundle signatures, API endpoint patterns, HTML data attributes, and network request fingerprints. This identifies apps that are currently active, not merely historically downloaded.
Each store is re-scanned on a recurring basis. Historical snapshots are retained to calculate 30-day, 90-day, and year-over-year growth rates. This enables trend analysis that reflects actual merchant behavior over time, not just point-in-time counts.
Disclaimer: Estimated metrics (revenue, traffic) should be considered directional estimates rather than audited financial data. Active install counts reflect StoreCensus detection capability and may not capture 100% of installations for apps with non-standard implementation patterns.
This page presents data from the SellUp: Add ons & Cart Upsell Installation Statistics proprietary StoreCensus dataset. Statistics may change over time as stores are discovered, removed, or updated in our index.
StoreCensus does not receive compensation from app developers or vendors for rankings or placement. All rankings are determined solely by observed installation data across tracked Shopify storefronts.
