Fifth Shelf is an all‑in‑one e‑commerce accelerator and Amazon partner. Founded in 2021, they buy inventory upfront, fund ads, optimize listings, and handle warehousing—profiting only when brands do. They also offer custom solutions, zero‑to‑brand launches, compliance support, and analytics tools. Designed to reduce operational complexity, they help brands scale across marketplaces with aligned incentives and no retainer fees