InventorySync.io — Multi-Channel Inventory Sync for Online Sellers

Features

Everything you need to sell everywhere

Built for multi-channel sellers who need reliability, speed, and visibility.

Real-Time Sync

Inventory updates propagate across all your stores in seconds via webhooks. Sell on Shopify, eBay updates automatically.

Oversell Prevention

Read-before-write checks and per-SKU locking ensure no double-counting, even during concurrent sales.

Smart Loop Prevention

Redis-backed change tracking prevents infinite webhook loops so your inventory stays stable across platforms.

Sales Analytics

Track bestsellers, dead stock, and sell-through velocity. See revenue breakdowns by platform in real time.

Stockout Predictions

Get alerted days before a product runs out based on your actual sales velocity. Never miss a sale again.

Market Intelligence

See what's trending on Amazon and eBay. Discover new product opportunities backed by real market data.

How It Works

Up and running in minutes

No complex setup. Connect your stores and start syncing.

Connect Your Stores

Link your Shopify, eBay, Etsy, and WooCommerce accounts with one-click OAuth.

Import & Map Products

Your products are automatically imported and matched by SKU across platforms.

Sync Automatically

Every sale, restock, or manual edit is pushed to all connected stores instantly.

Testimonials

Loved by multi-channel sellers

See what our early adopters are saying about InventorySync.

"We used to oversell at least twice a week across eBay and Shopify. Since switching to InventorySync, it hasn't happened once. The real-time sync is genuinely real-time."

Marcus Reynolds

RetroParts Co.

"The stockout predictions alone have saved us thousands. We get an email before we run out, reorder in time, and never lose a sale. Best tool in our stack."

Jessica Lin

Bloom & Thread

"I manage 400+ SKUs across multiple platforms. Before InventorySync, I had a spreadsheet and a prayer. Now it's all automated. Setup took about 10 minutes."

David Kowalski

GearVault

Pricing

Simple, transparent pricing

Start with a 14-day free trial. Cancel anytime.

Monthly Annual Save 17%

Starter

$29 /month

Up to 200 orders/month

For sellers just getting started with multi-channel.

Up to 3 stores
Unlimited SKUs
Real-time sync
Basic analytics
Stockout email alerts

Start Free Trial

No credit card required · 14-day free trial

Growth

$59 /month

Up to 1,000 orders/month

For growing businesses selling across multiple platforms.

Up to 8 stores
Unlimited SKUs
Real-time sync
Full analytics & insights
Stockout predictions
Monthly reports
Market intelligence
Priority support

Start Free Trial

No credit card required · 14-day free trial

Scale

$119 /month

Up to 5,000 orders/month

For high-volume sellers who need maximum reliability.

Unlimited stores
Unlimited SKUs
Everything in Growth
Priority stockout alerts
Dedicated support

FAQ

Frequently Asked Questions

Everything you need to know about InventorySync.

You connect your stores (Shopify, eBay, Etsy, WooCommerce) via one-click OAuth. InventorySync automatically imports your products and matches them by SKU across platforms. When a sale happens on any platform, stock levels are updated everywhere in real time — so you never oversell.

Every plan starts with a free 14-day trial — no credit card required. After the trial, you're billed monthly or annually via Stripe. You can upgrade, downgrade, or cancel anytime from your Billing page. Downgrades take effect at the end of your current billing period.

Starter ($29/mo) is great if you sell on 2–3 stores with up to 200 orders/month. Growth ($59/mo) is our most popular — it adds full analytics, stockout predictions, monthly reports, and supports up to 8 stores and 1,000 orders/month. Scale ($119/mo) is for high-volume sellers with unlimited stores and up to 5,000 orders/month.

For platforms that support webhooks (like Shopify), syncs happen within seconds of a sale. For platforms like eBay and Etsy, we poll for changes every 60 seconds. Either way, your stock levels stay accurate across all platforms with minimal delay.

Failed syncs are automatically retried up to 5 times with exponential backoff. We also run a daily reconciliation to catch any drift from missed webhooks or platform outages. You can monitor all syncs in your Sync History dashboard.

Yes! You can connect multiple Shopify stores or WooCommerce sites under one account. eBay and Etsy are one store per account (platform limitation). Your plan determines the total number of stores you can connect.

Absolutely. All platform credentials are encrypted with AES-256-GCM. We use OAuth for secure authentication — we never see or store your platform passwords. Payments are handled by Stripe, and we don't store any credit card information.

Yes, you can cancel your subscription at any time from the Billing page. Your access continues until the end of your current billing period. There are no cancellation fees or long-term contracts. After cancellation, your data (stores, products, sync history) is retained for 90 days. If you don't resubscribe within that window, it will be permanently deleted.

Keep inventory in sync across every platform