SoStocked

SoStocked is an Amazon inventory management and demand forecasting platform built specifically to solve the stockout and overstock problems that spreadsheets and generic software couldn't fix. The company was founded in 2019 by Amazon sellers Chelsea Cohen, John Koch, and Dan Fernandez, who had been selling on Amazon since 2014 and, after years of jumping between spreadsheets, Airtable, and other inventory tools that couldn't be tuned to their business, decided to build the fix themselves alongside 25 other top Amazon sellers. In 2022, SoStocked was acquired by Carbon6, the Amazon seller software ecosystem, and Carbon6 has since become part of the broader SPS Commerce product lineup.

Unlike black-box forecasting tools, SoStocked is designed to feel more like a fully customizable spreadsheet than a rigid algorithm, letting sellers see and adjust exactly how every forecast is calculated, factoring in sales velocity, seasonality, lead times, safety stock buffers, and promotions. The platform forecasts demand up to 12 months ahead and centers on an Inventory Command Center that surfaces KPIs, alerts, and stock-health widgets at a glance. Deeper tools include a Stockout Risk Analyzer that flags at-risk ASINs before sales are lost, an FBA Size Tier Optimizer and Overstock Fees Dashboard to reduce storage costs, a Master Carton Calculator, and full purchase order, supplier, and multi-location management across FBA, Amazon Warehousing and Distribution (AWD), and third-party (3PL) warehouses. A newer addition, ProfitFlow, extends the platform beyond inventory into forward-looking profit planning, forecasting sales, fees, and costs per ASIN to catch margin-draining products before they become a problem.

SoStocked serves Amazon sellers and agencies managing complex, multi-SKU catalogs across all Amazon marketplaces, including Pan-European and NARF-affected sellers, with reported adoption from over 1,000 customers who describe never wanting to go back to spreadsheets. Every plan includes free data migration (a $199 value) and personalized 1-on-1 onboarding, and the company reports helping sellers recover significant lost margin from stockouts, overstock, and hidden Amazon fees. Pricing scales with monthly order volume, starting at $175/month for the combined Inventory + Profit plan, making it best suited to established or scaling FBA sellers who need serious forecasting depth rather than a lightweight profit tracker.

SoStocked's core plan, Inventory + Profit, starts at $175 per month, with the final price scaling based on a seller's monthly order volume; the plan combines profit strategy tools (ProfitFlow) with full inventory forecasting in a single subscription. Carbon6 also offers discounted introductory terms for new customers, such as a 3-month plan around $474 USD (roughly $158/month) for accounts with up to 1,000 orders/month, along with longer-term contract options. Every plan includes free data migration from a seller's existing system (a $199 value), 1-on-1 onboarding, email and chat support, and coverage across all Amazon marketplaces. A free trial is available for sellers to evaluate the platform before committing, though there is no permanent free tier. Sellers with higher order volumes or more complex multi-warehouse needs should expect pricing to scale upward accordingly; exact figures for larger catalogs require contacting SoStocked's sales team.