Prices shown in your local currency. VAT/taxes may apply depending on your location. EU & UK residents: GDPR rights apply. Swiss residents: see Impressum.
Patented Technology

Sell Everywhere.
Fulfill Smarter.
Grow Faster.

eStack is the command center for multi-channel sellers. Automate inventory replenishment, sync orders across Amazon, Walmart, Shopify, and eBay. Never go out of stock again.

Works with: Amazon Walmart Shopify eBay
RetailProducts InventoryReportsPurchasing
Orders Today
2,847
↑ 18% vs yesterday
Channels
4 / 4
All synced
SKUs Active
1,581
Across all channels
Stock Health
97%
Auto-managed
Alert
Reorder Alert: "Wireless Earbuds SKU-4821" needs restock in 6 days. Supplier PO auto-generated for 500 units, ready to approve.
Amazon FBA
Shopify
eBay
Walmart

Sales Channels & Shipping Providers

Amazon
Walmart
Shopify
eBay
USPS
UPS
FedEx
DHL
Deutsche Post
DPD
Royal Mail

One platform.
Your entire operation.

From demand forecasting to multi-channel fulfillment, eStack replaces multiple tools with one intelligent hub.

Demand Planning

Proprietary, patented algorithms analyze sell-through velocity across all channels and automatically trigger reorder points, avoiding stockouts and overstock.

Patented

Multi-Channel Fulfillment

Ship Shopify, eBay, and Walmart orders using your Amazon FBA inventory via seamless MCF integration. One stock pool, all your storefronts.

Amazon Certified

Inventory & Order Management

Centralize all orders and inventory across every sales channel in real-time. View your global FBA inventory in one location to better plan purchasing.

Real-time sync

Global Shipping Solutions

Generate and print shipping labels with all major carriers and post offices worldwide. Compare rates, automate carrier selection, and fulfill from anywhere.

100+ Carriers

Auto Purchase Orders

eStack drafts the reorder automatically, based on forecasted demand and lead times, ready for you to review and approve in one click.

Auto-Generated

Analytics & Reporting

Inventory reports and sales reports across all your stores, unified in one dashboard so you always know exactly how your business is performing.

All stores

Product & Competitor Research

Built-in market intelligence tools native to your workflow. Discover opportunities, track competitors, and validate new products without switching apps.

Market intelligence

Intelligent inventory.
Zero stockouts.

Our patented recommendation engine predicts demand and recommends what to reorder. While you sleep, it’s calculating tomorrow’s reorder points from today’s data, ready for your approval.

Cross-channel demand signals

Aggregates velocity data from Amazon, Walmart, Shopify, and eBay simultaneously to compute accurate global demand curves.

Just-in-time replenishment

Patented JIT algorithms factor in supplier lead times, shipping windows, and seasonal trends to hit optimal stock levels automatically.

Auto-generated purchase orders

When a reorder threshold is hit, a supplier PO is drafted with quantities, costs, and delivery dates, ready for one-click approval.

U.S. Patents 10,521,764 B1 & 11,100,440 B1
Reorder Forecast: SKU-4821 · Wireless Earbuds
W1
W2
W3
W4↑
W5⚠
W6
Action Required
Stockout risk in 6 days. Reorder 500 units from Supplier #12 to maintain 28-day cover across all channels. Estimated cost: $4,200.

Ready to ship in 15 minutes

No complex onboarding. Connect your channels and start fulfilling orders fast.

1

Create Your Instance

Sign up and your eStack environment is ready instantly. No setup fees, no IT required.

2

Add Your Products

Import your catalog from any channel or upload via CSV. eStack auto-maps SKUs and variants.

3

Connect Your Channels

Plug in Amazon, Shopify, eBay, Walmart, and your shipping carriers in seconds.

4

Start Fulfilling

Orders flow in, eStack manages your inventory, and you focus on growing your business.

Built on two U.S. patents.
Ready when you are.

Join sellers who have eliminated stockouts, streamlined fulfillment, and scaled across channels with eStack’s patented platform.

Free trial included. No credit card required. Easy migration from existing tools.

Impressum / Legal Notice

eStack, Inc. — a Delaware corporation registered as a foreign corporation in the State of Washington
2120 1st Avenue N, Unit B-6 — Seattle, WA 98109 — United States
Phone: +1 (206) 890-0196  ·  Email: support@estack.com

eStack® is a registered trademark of eStack, Inc. EU/UK GDPR & Swiss revFADP inquiries: support@estack.com