eBay + Amazon seller tool. free plan, no credit card required

Manage eBay and Amazon
from one place.

Two separate seller dashboards. Two sets of inventory numbers that never quite match. Two chances to oversell and damage your ratings. Commerce Kitty syncs eBay and Amazon in real-time so you can run both as one business.

Sync eBay & Amazon Free
One inventory across all your selling channels Amazon eBay Shopify Etsy WooCommerce
The Real Cost

Running eBay and Amazon without sync isn't just inconvenient. it's expensive

2%
eBay defect threshold
before account restrictions
1hr+
Daily time lost switching
between seller portals
3–5%
Amazon cancellation rate
before policy violations kick in
72%
Buyers who won't return
after a canceled order
Before & After

What changes when eBay and Amazon share one inventory

✗ Without Commerce Kitty

  • Stock sells on Amazon. eBay listing stays active and oversells
  • Logging into Seller Central and eBay Seller Hub every single day
  • Amazon and eBay orders in two separate inboxes to manage
  • Cancellations damage metrics on both platforms independently
  • FBA inventory and eBay stock tracked in separate spreadsheets
  • No single view of your total sales performance across both channels

✓ With Commerce Kitty

  • Amazon sale instantly updates eBay. zero window for an oversell
  • One dashboard shows all orders from both marketplaces
  • FBA stock and eBay stock tracked from the same inventory source
  • Cancellation rate on both platforms drops to near zero
  • No spreadsheets. stock levels are always accurate and live
  • Combined performance view helps you optimize pricing and catalog
Features for Marketplace Sellers

Built for the realities of selling on both eBay and Amazon

Not a generic multichannel tool. Commerce Kitty is designed around how marketplace sellers actually work.

Real-Time Bidirectional Sync

An eBay sale instantly updates Amazon inventory. An Amazon sale instantly updates eBay. Always in sync, no batch delays.

Unified Order Dashboard

All eBay and Amazon orders in one screen. Filter by marketplace, status, or SKU without switching portals.

FBA Inventory Awareness

Commerce Kitty accounts for FBA stock separately from FBM stock, keeping your eBay quantities accurate relative to what you can actually fulfill.

Seller Rating Protection

Cancellations are the fastest way to damage your metrics on both platforms. Real-time sync prevents the oversells that cause them.

Bulk SKU Management

Map and manage hundreds of SKUs across both marketplaces. Bulk price updates, bulk stock adjustments, bulk listing pushes.

Cross-Marketplace Analytics

Compare eBay vs Amazon performance by SKU. Identify which marketplace is driving better margins and where to focus.

Real-time inventory sync across every channel

Connect your sales channels in minutes. Commerce Kitty keeps your stock accurate everywhere you sell. Free plan available.

Start Syncing Free
How It Works

Connect both marketplaces in minutes

No complicated setup. Just connect your accounts, map your products, and let the sync run.

1

Connect Amazon & eBay

Authorize Commerce Kitty with both your Amazon Seller Central account and your eBay seller account. Takes about 2 minutes each.

2

Match your products

Commerce Kitty imports your listings from both platforms and matches them by SKU or ASIN. Review and confirm the links.

3

One inventory, two marketplaces

Real-time sync runs automatically. Every sale on either platform updates the other immediately.

Get Started Free

I sell about 400 SKUs across Amazon and eBay. Before Commerce Kitty I was running two completely separate operations. different spreadsheets, different routines, constant overselling. Now it's genuinely one business with two storefronts.

Ryan M.. Amazon FBA & eBay seller, tools & hardware
FAQ

Questions about eBay and Amazon sync

Does Commerce Kitty support Amazon FBA?
Yes. Commerce Kitty understands the difference between FBA stock (held by Amazon) and FBM stock (fulfilled by you). When syncing eBay quantities, it accounts for your FBA inventory so your eBay stock levels reflect what you can actually ship.
What if I sell a product on Amazon only and not on eBay?
No problem. Commerce Kitty only syncs products you've explicitly linked between the two platforms. Products that only exist on one marketplace are unaffected. you control which products participate in the sync.
How does it handle the race condition when both marketplaces sell at the same time?
Commerce Kitty uses real-time locking to prevent simultaneous oversells. If an item sells on eBay and Amazon at almost exactly the same moment, only one order processes. The second buyer sees the item as out-of-stock.
Can I see Amazon and eBay orders in one place?
Yes. The unified order dashboard shows all orders from both marketplaces. You can filter by channel, date, status, or SKU without having to log into Seller Central and eBay Seller Hub separately.
Does this work for large catalogs with hundreds of SKUs?
Yes. Commerce Kitty is built to handle large catalogs. Product matching is automated using SKU and ASIN matching, and you can bulk-manage stock adjustments and pricing across hundreds of listings at once.
Can I also connect Shopify, Etsy, or WooCommerce?
Absolutely. Commerce Kitty supports Shopify, Etsy, WooCommerce, and BigCommerce in addition to Amazon and eBay. Once your two marketplaces are connected, adding a storefront channel takes just a few minutes.

eBay and Amazon should work as one business, not two

Every day you manage them separately is a day of duplicate work, inventory risk, and missed opportunities. Connect them once and run both from a single dashboard.

Sync eBay & Amazon Free
Free plan included No credit card required FBA supported

Ready to sync your inventory?

Connect your sales channels in minutes. Real-time sync across Shopify, Etsy, Amazon, eBay, and more. Free plan available, no credit card required.

Start Syncing Free
Free plan included No credit card required Set up in 5 minutes