Vendoo (YC W22) | 3,061 followers on LinkedIn. Vendoo: A Seller's Best Friend. Multichannel Listing Tool and Inventory Management Software for Online Sellers | Now introducing Vendoo Enterprise: Vendoo simplifies multichannel selling for larger reselling businesses. Easily bulk upload and manage your inventory across multiple marketplaces, including those without APIs. Vendoo is a software created to solve the daily pain points of the millions of sellers in the steadily growing reselling industry.