Stop Losing Money to Inventory Mistakes
StackKnack helps sneaker and luxury resale teams sell with confidence by eliminating inventory mismatches across Shopify, StockX, eBay, and in-store — so staff can say “yes” instantly, without double-checking.
The sale dies in the double‑check
A customer is ready to buy. Your staff pauses to cross‑check Shopify, StockX, and eBay. Minutes pass. The answer isn’t clear. The customer walks. Inventory uncertainty quietly kills revenue.
Customers walk when the answer isn’t instant. Every extra check is a chance to lose the sale.
Small teams bounce between tabs and texts while the line waits. Confidence drops fast.
Oversells, duplicates, and mismatched conditions pile up across channels.
How it works
Three simple steps to give your team one confident answer at the counter.
We pull the inventory signals you already use.
We align listings, quantities, and conditions.
Your team sees a single, confident response.
What this enables
Who it’s for
- Sneaker and luxury resale operations (in-store, warehouse, or hybrid)
- Teams selling across Shopify plus resale marketplaces (StockX, eBay, GOAT)
- Small to large inventory volumes where accuracy directly impacts revenue
- Operations where staff need fast, trusted answers at the point of sale or fulfillment
Who it’s not for
- Generic ecommerce brands with single-channel inventory
- Dropshipping or print-on-demand businesses
- Teams without real-time inventory accuracy issues
- Operations where staff never need to answer “can we sell this right now?”
More than software — operational accuracy, done right
StackKnack isn’t just a dashboard.
We onboard stores carefully to ensure inventory accuracy from day one, reviewing real workflows before expanding automation.
For complex or high-volume setups, onboarding includes direct guidance to ensure accuracy at scale.
This is why high-volume resale operations trust StackKnack in production.
Pricing & Onboarding
Already used in production by high-volume resale operations.
Core platform starts at $150/month.
Designed for smaller or simpler operations.
Ops Partner & Enterprise
Custom pricing for high-volume, multi-location, or complex resale operations. Includes hands-on onboarding, workflow alignment, and scale-specific support.
Learn about Ops PartnerYou’ll know in 10 minutes if StackKnack is a fit.
Book a 30-min walkthroughYou’ll know in 10 minutes if this is a fit
Book a quick walkthrough and tell us how you sell. We’ll confirm fit and next steps on the call.
Book a 30-min callFAQ
Is StackKnack a replacement for my POS or marketplace tools?
No. StackKnack sits alongside your POS and sales channels to keep inventory accurate and trustworthy across systems.
How long does onboarding take?
Most stores are onboarded in days, not months. We review your workflows upfront to ensure accuracy before expanding automation.
Can StackKnack handle high-volume or multi-location operations?
Yes. StackKnack is already running in production for high-volume resale operations, including multi-location setups.
What integrations do you support?
We currently support Shopify, eBay, and Clover, with additional integrations added based on operational needs.
Do I need to change how my team works?
No. StackKnack adapts to your existing workflows rather than forcing a rigid process.
Is this only for sneaker stores?
No. StackKnack is built for sneaker and luxury resale operations where inventory accuracy directly impacts revenue.
How is pricing determined?
Pricing is based on operational complexity and scale, not feature tiers. We’ll quickly confirm fit before onboarding.