Stop Losing $5K+/month to Inventory Mistakes
Resale teams using StackKnack answer “can we sell this?” in seconds — not minutes. We sync your Shopify, StockX, eBay, and in-store inventory so your staff never double-checks again.
Every “hold on, let me check” costs you money
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. This happens dozens of times a week.
Customers walk when the answer isn’t instant. At 10+ lost sales/month, that’s $2,000+ walking out the door.
Small teams bounce between tabs and texts while the line waits. That’s hours lost every day.
Oversells, duplicates, and mismatched conditions pile up. Each one costs you money and reputation.
Sound familiar?
See exactly how StackKnack fixes this for stores like yours. 30 minutes. No commitment.
Go live in under an hour
Three steps to give your team one confident answer at the counter.
We connect to Shopify, eBay, Clover, and more. Takes minutes, not days.
We align listings, quantities, and conditions across every channel and location.
Staff see a single, confident response. “Yes, it’s available.” Done.
What changes after StackKnack
Staff answer instantly. No tabs, no texts, no “let me check.” Customers buy on the spot.
Real-time sync means you never sell what you don’t have. Protect your margins and your reputation.
Clean, accurate records across every location and channel. No more spreadsheet chaos.
Scale from 1 to 5 locations without proportionally adding staff. StackKnack handles the complexity.
StackKnack is made for resale operations like yours
In-store, warehouse, or hybrid operations
Shopify + StockX + eBay + GOAT — all synced
Staff at the counter or fulfillment floor
Where inventory accuracy directly impacts revenue
We don’t just sell software — we make sure it works for your store
Every store gets hands-on onboarding. We review your actual workflows, connect your channels, and verify accuracy before you go live.
For complex or high-volume setups, you get direct guidance from our team to ensure accuracy at scale.
Starts at $150/month
No hidden fees. No long-term contracts to start. Cancel anytime.
Core
$150/month
Everything you need to get started
- Multi-channel inventory sync
- Real-time availability checks
- Shopify + eBay + Clover integrations
- Smart collections & price rules
- Consignor invoicing & payouts
- Inventory labels & bulk operations
- Slack notifications
- Standard onboarding (< 1 hour)
Ops Partner
Custom pricing
For scaling and multi-location teams
- Everything in Core
- Multi-location support
- In-store sales & kiosk mode
- Embedded analytics dashboards
- Stripe payment processing
- Purchase order management
- Hands-on workflow alignment
- Dedicated onboarding
You’ll know in 10 minutes if StackKnack is a fit. No pressure, no sales pitch — just an honest conversation.
See if StackKnack is right for your store
Book a quick 30-minute walkthrough. Tell us how you sell, and we’ll show you exactly how StackKnack fits your workflow.
- See a live demo with your actual channels
- Get honest feedback on fit
- No sales pitch, no pressure
Got questions? We’ve got answers.
No. StackKnack sits alongside your POS and sales channels to keep inventory accurate and trustworthy across systems.
Most stores are onboarded in under an hour. We review your workflows upfront to ensure accuracy before expanding automation.
Yes. StackKnack is already running in production for high-volume resale operations, including multi-location setups.
We currently support Shopify, eBay, and Clover, with additional integrations added based on operational needs.
No. StackKnack adapts to your existing workflows rather than forcing a rigid process.
No. StackKnack is built for any resale or consignment operation where inventory accuracy directly impacts revenue — sneakers, luxury, vintage, streetwear, designer goods, and more.
Pricing is based on operational complexity and scale, not feature tiers. We’ll quickly confirm fit before onboarding.
You'll know in the first 10 minutes of our call. There's no commitment, no contract to sign upfront. If it's not a fit, we'll tell you honestly.
Stop losing sales to inventory uncertainty
Join resale teams already using StackKnack in production. Book a free 30-minute walkthrough today.
Book your free demo nowFree · 30 min · No commitment