SoStocked (now part of Carbon6) is a dedicated inventory management platform for Amazon FBA sellers. It forecasts demand, generates purchase orders, and helps prevent both stockouts and overstock situations. We've used it across catalogs ranging from 20 to 500+ SKUs — here's an honest assessment of what it does well, where it falls short, and whether it's worth the monthly investment.
SoStocked is a specialized inventory planning tool. It does one category of things — inventory management — and does them in depth. It is not an all-in-one seller suite like Helium 10 or Jungle Scout. If you are asking "is SoStocked worth it in 2026" or looking for the best Amazon inventory management tool, this review covers the features, pricing, and limitations in detail. You won't find keyword research, listing optimization, or PPC management here. What you will find is the most thorough inventory forecasting and reorder planning system available for Amazon sellers in 2026.
The tool was originally founded by Chelsea Cohen in 2020 and quickly became the go-to inventory tool for serious FBA sellers. Carbon6 acquired SoStocked in 2022, bundling it into their growing suite of Amazon seller tools (which also includes PixelMe, D8aDriven, and others). The integration into Carbon6 has brought some UI improvements and cross-tool features, though the core inventory engine remains largely the same.
This is SoStocked's core strength. The forecasting engine goes well beyond simple moving averages:
In our experience, SoStocked's forecasting accuracy for products with 6+ months of sales history is within 10-15% of actual demand over a 30-day window. For seasonal products, the accuracy is notably better than tools that only use linear projection.
SoStocked tracks the full supply chain timeline per product:
The tool combines all these timelines to calculate a "reorder date" for each SKU — the latest date you can place a PO with your supplier without risking a stockout. This is where SoStocked earns its keep: when you're managing 50+ SKUs with different suppliers and lead times, manually tracking reorder dates in a spreadsheet becomes error-prone and time-consuming.
Based on its forecasting and reorder calculations, SoStocked generates purchase orders that you can send directly to suppliers. POs include:
SoStocked helps plan FBA shipments considering Amazon's storage limits:
SoStocked tracks inventory across Amazon US, Canada, UK, EU marketplaces, and Walmart. If you sell in multiple regions, having a unified view of inventory levels, reorder dates, and supplier timelines across all marketplaces is a significant advantage over tracking each marketplace separately.
| Plan | Monthly cost | SKU limit | Key inclusions |
|---|---|---|---|
| Starter | ~$49 | Up to 500 SKUs | Basic forecasting, reorder alerts, 1 marketplace |
| Professional | ~$99 | Up to 2,000 SKUs | Advanced forecasting, seasonal adjustments, multi-marketplace |
| Enterprise | ~$199 | Unlimited | All features, API access, priority support, custom reporting |
Carbon6 occasionally bundles SoStocked with their other tools at a discount. Check for current bundle pricing if you're also interested in their PPC or analytics tools. Annual billing typically saves 15-20%.
| Pros | Cons |
|---|---|
| Best-in-class demand forecasting for FBA | Steep learning curve — setup takes hours, not minutes |
| Seasonal and promotional adjustments prevent common forecasting errors | Overkill for sellers with under 20 SKUs |
| Multi-marketplace inventory tracking | No profit analytics (need Sellerboard or similar alongside) |
| PO generation saves significant time at scale | Interface can feel overwhelming for new users |
| IPI-aware shipment planning | At $49-199/mo, adds real cost to your tool stack |
| Feature | SoStocked | Sellerboard | RestockPro |
|---|---|---|---|
| Demand forecasting | Advanced (seasonal, trend) | Basic (velocity only) | Good (velocity + trend) |
| Supplier management | Good | None | Excellent |
| PO generation | Yes | No | Yes (automated) |
| Profit analytics | No | Yes (core feature) | Basic |
| Starting price | $49/mo | $15/mo | $49/mo |
| Best for | Private label, 50+ SKUs | Budget-conscious, under 50 SKUs | Wholesale/arbitrage |
For the full comparison of inventory tools, see our best inventory management tools roundup.
Ideal users:
Not the right fit for:
SoStocked is the best dedicated inventory management tool for Amazon FBA sellers with complex operations. Its seasonal forecasting, lead time tracking, and PO generation capabilities are significantly more sophisticated than what you get from all-in-one tools like Helium 10 or basic alternatives like Sellerboard's inventory features.
The ROI math is straightforward: if preventing one stockout per year saves you $3,000-10,000 in lost revenue and ranking recovery, the $49-199/month subscription pays for itself quickly. But don't subscribe until your operation is complex enough to need it — for smaller catalogs, the simpler (and cheaper) alternatives work fine.
For tips on reducing overall FBA costs (including the storage fees that good inventory management helps avoid), check our guide on how to reduce Amazon FBA fees. Sellers looking for SoStocked pricing plans can start with the $49/month Starter tier and upgrade as their catalog grows. For AI-powered tools that complement your inventory planning with smarter listing copy and research, see Nesyona's AI writing tools guide.