Sales channel
OnBuy Inventory Management
Sync your OnBuy stock in real time
Real-time
OnBuy sync
UK-focused
marketplace
Free
up to 50 SKUs
OnBuy is the UK's fastest-growing marketplace. Keep your OnBuy listings stocked and accurate alongside eBay, Amazon, and your website — without ever touching a spreadsheet.
What you get with OnBuy + Salync
Prevent OnBuy cancellations
Cancelled orders hurt your OnBuy seller metrics. Salync keeps your quantities accurate so you only sell what you actually have.
Sync with eBay and Amazon
Selling the same products on eBay and Amazon too? Salync updates all three the moment any channel gets an order.
SKU-based matching
Salync links your OnBuy listings to your central inventory via SKU — so stock always flows to the right listing.
Bulk stock updates
Received a new delivery? Update quantities for hundreds of OnBuy listings at once from your Salync dashboard.
Low-stock alerts
Get notified before your best-selling OnBuy items run out so you can reorder in time.
Movements audit trail
Every stock change is recorded with a timestamp and source channel — useful for reconciling orders and supplier deliveries.
How it works
Connect OnBuy
Authorise Salync with your OnBuy seller account. Connection takes under a minute.
Import your listings
Salync pulls in your active OnBuy listings and matches them to your product catalogue by SKU.
Link other channels
Connect eBay, Amazon, Shopify, or any other channel. All stock is managed centrally.
Sell with accurate stock
Every sale anywhere instantly updates your OnBuy quantities. No manual work required.
Ready to sync your OnBuy inventory?
Free for up to 50 SKUs. No credit card required.
Frequently asked questions
What is OnBuy?
OnBuy is a UK-based online marketplace founded in 2016. It charges lower seller fees than Amazon and eBay and has grown rapidly among British sellers.
Will Salync update my OnBuy stock when I sell on eBay?
Yes. An eBay order immediately triggers a stock update on your connected OnBuy listings — and all other channels — in real time.
How does Salync connect to OnBuy?
Salync connects to OnBuy via their seller API using your OnBuy API credentials. Setup takes under a minute.
Can I manage OnBuy and Amazon inventory together?
Yes. Salync lets you manage inventory across OnBuy, Amazon, eBay, Shopify, and more from a single dashboard — with all channels staying in sync automatically.
Other integrations
Start managing your OnBuy inventory today
Join thousands of sellers using Salync to keep stock accurate across every channel. Free for up to 50 SKUs.
Get started free