Underdays tech stack
About Underdays's storefront
The captured Underdays storefront organizes its catalog into shopping sections including Build your Bundle and Discover UNDERskin™. These are examples from its navigation, not a complete product inventory.
Detected stack
| Layer | Tool | Confidence | Evidence |
|---|---|---|---|
| Platform | Shopify | high | signature: cdn.shopify.com |
| Upsell & checkout apps | Rebuy | high | signature: rebuyengine |
| Email & SMS marketing | Klaviyo | good | signature: klaviyo |
| Analytics & attribution | Triple Whale | good | signature: triplewhale |
| Shopify review apps | Junip | good | signature: junip |
What stands out in Underdays's detected stack
Junip appears on 50 of the 781 apparel storefronts with at least one detected tool in this dataset (6%). Underdays is one of those observed storefronts. This measures how often we detect the tool, not its quality or the brand's results.
Junip and Rebuy are both detected on Underdays. That same pair appears together on 6 apparel storefronts in our dataset. Co-occurrence is a useful starting point for researching a stack, but does not establish that the tools are integrated or which features are enabled.
| Tool | Observed in this category | Explore the tool |
|---|---|---|
| Shopify | 737 / 781 (94%) | Shopify pricing · Shopify alternatives |
| Rebuy | 88 / 781 (11%) | Rebuy pricing · Rebuy alternatives |
| Klaviyo | 609 / 781 (78%) | Klaviyo pricing · Klaviyo alternatives |
| Triple Whale | 137 / 781 (18%) | Triple Whale pricing · Triple Whale alternatives |
| Junip | 50 / 781 (6%) | Junip pricing · Junip alternatives |
How Underdays compares in apparel
We detect 5 tools on Underdays's storefront. The median apparel storefront with at least one detection has 5 detected tools. In the 10-layer comparison below, Underdays has detections in 5 layers.
Layer by layer
| Layer | On this storefront | apparel peers |
|---|---|---|
| Platform | Shopify | 98% |
| Email & SMS | Klaviyo | 86% |
| Reviews & UGC | Junip | 76% |
| Support & CX | not detected | 29% |
| Analytics | Triple Whale | 23% |
| Upsell & checkout | Rebuy | 13% |
| Subscriptions | not detected | 3% |
| Loyalty | not detected | 13% |
| Page builder | not detected | 8% |
| Post-purchase | not detected | 14% |
Other apparel stacks to explore
These storefronts share detected tools with Underdays. Selection is based on overlap within this category; it is not a ranking or an endorsement.
Matador
Shared detections: Shopify, Rebuy, Klaviyo, Triple Whale, Junip.
Sheep Inc
Shared detections: Shopify, Klaviyo, Triple Whale.
Lems Shoes
Shared detections: Shopify, Klaviyo, Triple Whale, Junip.
Research your own stack
Use Underdays's profile as a reference, then scan your own storefront to see what is detectable. Compare your tools with Stack Benchmark and model your own plans and usage in the Stack Cost Calculator. A public signature cannot reveal Underdays's bill, contract or implementation.