Sell in Without Chaos
The world's largest e-commerce market. Six platforms. One operational view.
The United States is the biggest e-commerce market on Earth -- over USD 1 trillion in annual online sales and 270 million digital shoppers. American consumers buy everything online, expect fast and free shipping, and spread their spending across multiple platforms. Amazon dominates but doesn't monopolise. Walmart is growing aggressively. eBay remains strong. TikTok Shop is disrupting social commerce. For sellers worldwide, this represents the ultimate opportunity -- and the ultimate operational challenge.
Vastyn connects all six major platforms into one operational view -- unified inventory, consolidated orders, complete fulfilment visibility.
Six platforms. One dashboard. Real-time sync. America's trillion-dollar opportunity, simplified.
Built on AWS. Official marketplace APIs. Designed for American-scale volume.
Is United States right for you?
This is for you if
- Entering the American market or scaling existing operations
- Need unified inventory across Amazon, Walmart, eBay, TikTok Shop, and more
- Want visibility into sales tax (marketplace facilitator laws handle collection)
- Managing both Amazon and Walmart (the dual-platform strategy)
- Preparing for peak season complexity (Black Friday, Prime Day, Holidays)
This is not for you if
- Single platform, no expansion planned
- Under 50 orders/month, prefer manual processes
- Need marketplace account setup (we connect existing accounts)
- Need full WMS (we integrate with them)
The World's E-Commerce Giant
Unmatched Scale
Over USD 1 trillion in annual e-commerce sales. More than 270 million online shoppers. Roughly a quarter of global e-commerce in a single market. No other country comes close.
Platform Diversity
Amazon dominates with 200+ million Prime members, but Walmart is the fastest-growing challenger with 120+ million monthly visitors. eBay remains strong in specific categories. TikTok Shop disrupts with social commerce. This diversity creates multiple paths to American consumers -- and multiple revenue streams for sellers who can manage the complexity.
Consumer Spending Power
American consumers have disposable income and willingness to spend online. Average order values exceed most markets. Premium products, everyday essentials, and everything in between find buyers.
Marketplaces in United States
Amazon
DominantWalmart
Fast-Growing #2eBay
MajorTikTok Shop
Social CommerceEtsy
Handmade/VintageShopify
Own StoreOperationally: List once. Sell on six channels. Inventory that stays accurate across all of them. Orders flowing into a single inbox.
With Vastyn vs Without
What You Need to Sell in United States
Business Registration
No local entity required to start. International sellers use home registration. A US LLC may simplify banking and tax filing as you scale.
Sales Tax
Marketplace facilitator laws mean Amazon, Walmart, eBay collect and remit in most states. For Shopify stores, you may need to collect (Shopify calculates).
Product Compliance
Varies by category: FDA (food, drugs, cosmetics), CPSC (consumer safety, children's), FCC (electronics), EPA (environmental), California Prop 65.
Language
English throughout. No translation required -- same content serves the entire market.
Currency
US Dollars (USD). Vastyn handles conversion to your base currency.
Unified United States Operations
All Six Platforms Connected
Amazon Seller Central, Walmart Seller Center, eBay Seller Hub, TikTok Seller Center, Etsy Shop Manager, Shopify Admin -- all feeding into one unified view.
- Single order inbox across all six platforms
- Unified inventory -- no more manual sync
- Coordinated pricing across all channels
- Combined analytics in one view
Real-Time Inventory Sync
Sell on Amazon, and Walmart, eBay, TikTok Shop, Etsy, and Shopify update within two minutes. Black Friday hits -- you're selling across six channels simultaneously. Inventory stays accurate across every platform, every minute.
- Sub-2-minute sync across all channels
- Stock reserved instantly at point of order
- Event-driven architecture, not scheduled batches
- Handles peak volume without degradation
Sales Tax Visibility
Track what platforms collect across all 50 states. Marketplace facilitator laws handle most complexity, but visibility matters for your records.
- Track collections across all 50 states
- Marketplace facilitator law compliance
- Shopify tax calculation support
- Full audit trail for compliance
Enterprise-grade foundations
Vastyn runs on AWS infrastructure -- the same cloud that powers much of American e-commerce. 99.9% uptime. Official APIs (Amazon SP-API, Walmart Marketplace API, eBay REST API). Full audit trails.
This matters when processing thousands of orders daily. This matters during Prime Day when velocity spikes 10x. This matters during the holiday season when a single oversell cascades into account health warnings. Marketplace connections stable during peak periods. Data secure. Operational history always available.
Fulfilment Options
FBA (Fulfilled by Amazon)
Prime eligibility. Same-day, one-day, two-day shipping. Amazon handles storage, picking, packing, returns.
WFS (Walmart Fulfilment)
Walmart's answer to FBA. Two-day delivery. "Fulfilled by Walmart" badge builds trust. Essential for diversifying beyond Amazon.
Fulfilled by TikTok (FBT)
Social commerce orders. Fast delivery for impulse purchases that need immediate gratification.
3PL / Self
Full control. Abundant 3PL options nationwide. Vastyn manages inventory and pushes tracking to all platforms.
Your North American Hub
American operations naturally extend to Canada and Mexico -- and connect to Amazon's worldwide network.
North American Expansion
Amazon North America unified account. Walmart operates in all three countries. Add Canada to your setup in Vastyn -- your catalogue, inventory logic, and workflows extend. Selling in Canada within hours, not weeks.
Sell in Canada →Amazon Global Selling
Your seller account connects to Amazon's worldwide network. Expand to the UK, Germany, France, Japan, Australia, and beyond. All regions unified in one dashboard.
Multi-Platform Global Reach
eBay is worldwide. Etsy is global. TikTok Shop is expanding internationally. Success here builds operational capability that translates globally.
Peak Seasons & Events
Black Friday / Cyber Monday
Late November. The biggest shopping event in the world. Massive volume across all platforms. Weeks of preparation required.
Prime Day
Usually July. Amazon's mid-year mega-event. Competitors run parallel promotions.
Holiday Season
Nov-Dec. Thanksgiving through Christmas. Fulfilment cut-off dates matter. Late deliveries mean angry customers.
Back to School
Late summer. School supplies, dorm essentials, electronics. Second-largest retail season after holidays.
“We were Amazon-only for years. When we added Walmart, the operational complexity nearly broke us -- different dashboards, different inventory, different fulfilment. We oversold constantly between the two platforms. Vastyn unified everything. Now we're on six channels, and Black Friday last year was our smoothest ever. The dual Amazon-Walmart strategy finally works.”
— Director of E-Commerce, consumer goods brand selling across all major American marketplaces
Launch in Minutes
Connect Your Marketplaces
Connect your marketplace accounts via secure OAuth.
Configure USD Settings
Configure USD pricing rules and sales tax visibility preferences.
Sync Inventory
Sync inventory across all connected platforms.
Start Selling
Start selling. Orders flow into unified inbox. Inventory updates in real time.
Time to launch: 30-60 minutes for full multi-channel setup.
Common questions about United States
Ready to Run Six American Marketplaces From One Dashboard?
Six platforms. One operational view. Real-time sync. America's trillion-dollar opportunity, simplified.
Amazon, Walmart, eBay and more
Built on AWS · Official marketplace APIs · OAuth authentication · Role-based access · Full audit trails