SellDeck
Locks eBay and Depop listings during Whatnot shows and tracks show profit
Inventory & Cross-listing apps for Whatnot sellers
Keep stock in sync across Whatnot, eBay, Poshmark, TikTok Shop and more.
Apps
Crosslist
Universal listing form that publishes to many marketplaces
Vendoo
One inventory list that crossposts and syncs sales, including Whatnot (beta)
Whatnot Connector for Odoo (Commercium)
Odoo app that syncs Whatnot listings, live stock and orders
TCG Automate
Exports card listings to a Whatnot-ready CSV, auction or Buy It Now
Card Pilot
Inventory, labels and multi-channel listing for card sellers, incl. Whatnot
ExportYourStore
Two-way Whatnot cross-listing and inventory sync with your other stores
Nifty
Cloud crosslisting and automation, with Whatnot on Crosslisting and Bundle plans
List Perfectly
One catalog to crosslist and track inventory across many marketplaces
Mascot
Card inventory and crosslisting with a Whatnot channel and auto-delist on sale
Underpriced AI
Photo-to-listing pricing tool with a free extension for Whatnot forms
Sidekick Tools (formerly Posh Sidekick)
Automation bots and crosslisting for Poshmark, Mercari and Whatnot
FAQ
Can I sync Whatnot inventory with eBay?
Cross-listing tools copy listings between marketplaces and help delist sold items.
Is cross-listing allowed?
Check each marketplace policy; tools only automate what you could do by hand.
What should I compare?
Supported marketplaces, auto-delist, bulk editing and monthly price.