Online Seller Solutions

Online Seller Solutions (OSS) is a specialized Amazon operations firm that helps sellers and brands resolve catalog, listing, account, and compliance issues. Founded by Vanessa Hung, our team works directly in the backend of Seller Central and Vendor Central to fix the problems that hold listings back and cost sellers revenue.

Our services include Brand Registry support, category and brand ungating, variation restructuring, GTIN and UPC corrections, buy box recovery, listing suppression fixes, geographic sale restriction removal, deal eligibility, and catalog and flat file work. We also offer ongoing account management for brands that need continuous control over listings, inventory, compliance, and account health.

Every engagement begins with a diagnostic so we can determine whether there is a path forward before quoting any remediation work. Clients receive a clear picture of what is happening with their account and a defined scope for the fix. We work with brands, resellers, agencies, and aggregators, and have completed more than 200 projects across 10+ marketplaces.

Our approach is responsive, transparent, and focused on solving the root cause rather than applying temporary workarounds.