Updated May 2026
Best Inventory and Restock Software for Amazon FBA (2026)
A direct, data-driven roundup for private-label brands doing 250K to 5M dollars a year. Inventory Hero is included and we think it is strong, but the table is honest: every tool here earns its place for a specific kind of seller, and we say plainly where each one is weak.
The short answer
For Amazon FBA private-label brands doing 250K to 5M dollars a year, the best inventory and restock software in 2026 is the one that turns sales velocity into a defensible purchase order: it forecasts demand by SKU, accounts for supplier lead time and minimum order quantity, and flags the 2026 Amazon storage and low-inventory costs before they hit your statement. Sellerboard is the strongest choice when profit analytics is the priority, SoStocked when you need deep purchase-order configurability, Forecastly for fast restock alerting, Helium 10 if you already pay for its suite, and Inventory Hero for sellers who want forecasting plus restock plus fee exposure in one focused tool. There is no single winner for every catalog; match the tool to how you actually reorder.
The 2026 comparison table
Scored on the five things that actually decide a reorder. Order is by fit for the stated use case, not a single overall winner. See the methodology for how each column is judged.
| Tool | Best for | Forecasting | Restock math | 2026 fee awareness | Multi-location |
|---|---|---|---|---|---|
| Inventory Hero | Sellers who want demand forecasting, restock recommendations, and 2026 fee exposure in one focused tool | Strong | Strong | Strong | Yes |
| Sellerboard | Sellers who want profit analytics first, with restock as a module | Solid | Solid | Solid | Partial |
| SoStocked | Sellers who need deeply configurable purchase-order workflows | Solid | Strong | Basic | Yes |
| Forecastly | Sellers who want fast, opinionated restock alerts | Solid | Solid | Basic | Partial |
| Helium 10 (Inventory Management) | Sellers already paying for the Helium 10 suite | Add-on | Add-on | Basic | Partial |
| RestockPro (eComEngine) | FBA sellers who want restock plus kitting and supplier tracking | Basic | Solid | Basic | Partial |
Competitor rows describe verifiable, publicly stated capabilities and positioning. We do not list competitor pricing because public plan pricing changes frequently and a stale number would be misleading. Where money matters, this page anchors to Amazon's published 2026 fee schedule below.
The tools, in detail
1. Inventory Hero
Best for: Sellers who want demand forecasting, restock recommendations, and 2026 fee exposure in one focused tool
Inventory Hero connects to Seller Central, projects unit demand at 30, 90, and 365 days from real sales velocity, and converts that into a restock quantity that respects supplier lead time, minimum order quantity, and seasonal peaks. It buckets every SKU by inventory age and surfaces projected long-term storage and low-inventory cost exposure before fees post, which is the part most spreadsheets miss. Honest trade-off: it is purpose-built for FBA, AWD, and 3PL inventory planning, so it is not a profit-and-loss dashboard or a PPC tool. If your single biggest pain is stockouts and aging stock, it is built for exactly that.
2. Sellerboard
Best for: Sellers who want profit analytics first, with restock as a module
Sellerboard is widely used as a profit-and-loss and fee-tracking dashboard for Amazon sellers, and it includes a restock and inventory module that estimates reorder timing from sales history. Its strength is that inventory decisions sit next to true net margin per SKU, so you reorder with profit context, not just velocity. Honest trade-off: forecasting and purchase-order configurability are intentionally lighter than tools that specialize in restocking, so very complex supplier setups can outgrow it.
3. SoStocked
Best for: Sellers who need deeply configurable purchase-order workflows
SoStocked is built specifically for Amazon inventory management and is known for highly customizable forecasting inputs, reorder formulas, and purchase-order management. If you manage many SKUs with varied suppliers, lead times, and MOQs, its configurability is its main advantage. Honest trade-off: that flexibility carries a steeper setup and learning curve, and its focus is the supply chain rather than 2026 fee exposure modeling, so pair it with the fee math below.
4. Forecastly
Best for: Sellers who want fast, opinionated restock alerts
Forecastly focuses on demand forecasting and timely restock alerts, including inbound-shipment awareness and reorder suggestions designed to prevent stockouts. It is a good fit for sellers who want to be told when and roughly how much to reorder without configuring a heavy system. Honest trade-off: it is a focused restock tool rather than a broad profit suite, so you will still track margin and 2026 fees elsewhere.
5. Helium 10 (Inventory Management)
Best for: Sellers already paying for the Helium 10 suite
Helium 10 is a broad Amazon seller suite (research, keywords, listings, analytics) that includes inventory and restock tooling. Its advantage is consolidation: if you already rely on Helium 10 daily, keeping inventory in the same login reduces tool sprawl. Honest trade-off: inventory is one feature inside a large platform rather than its core focus, so dedicated restock tools generally go deeper on lead-time and MOQ modeling.
Read the full Helium 10 (Inventory Management) vs Inventory Hero comparison
6. RestockPro (eComEngine)
Best for: FBA sellers who want restock plus kitting and supplier tracking
RestockPro from eComEngine is an established FBA restocking tool that estimates reorder quantities and timing from sales velocity and supports supplier and purchase-order tracking and kitting workflows. It is a practical operational choice for hands-on FBA teams. Honest trade-off: its forecasting model is more rules-of-thumb than advanced demand projection, and it does not specialize in modeling the 2026 fee changes.
Why 2026 Amazon fee math changes the decision
Inventory software is only as good as the fee reality it plans against. Amazon's 2026 US schedule changed enough that velocity-only restock math now leaves money on the table. The numbers below are Amazon's published 2026 rates, not our estimates.
Storage swings roughly 2.7x by season
Standard-size monthly storage is about 0.87 dollars per cubic foot off-peak (January to September) and about 2.40 dollars per cubic foot at peak (October to December). Oversize runs about 0.56 dollars off-peak and 1.40 dollars at peak. A restock plan that ships peak-season cover too early pays the high rate to warehouse it.
2026 fulfillment fees are price-banded
Fulfillment fees now depend on whether an item is priced under 10 dollars, 10 to 50 dollars, or over 50 dollars. A large standard-size unit at 1 to 1.25 lb is about 4.22 dollars under 10 dollars and about 5.30 dollars over 50 dollars. Reorder quantity decisions interact with pricing and tier in a way a flat per-unit assumption misses.
Sub-10-dollar items get a discount band
Products under 10 dollars no longer pay standard rates and instead receive a discounted fulfillment fee, replacing the old Small and Light program. For low-ASP catalogs this changes the true landed cost per reorder and therefore the reorder quantity that stays profitable.
Aging inventory is a planned cost, not a surprise
Because long-term storage and low-inventory costs compound on slow movers, the best 2026 tools bucket SKUs by age (for example 0 to 90, 91 to 180, 181 to 270, 271 to 365, and 365 plus days) and surface exposure before fees post, so you can promote, bundle, or remove while there is still time.
Want to run your own SKU against the 2026 schedule? Use the free Amazon FBA fee calculator.
How we judged each tool
Five criteria, weighted toward what actually loses or makes money on a reorder. We did not score on logo count or marketing copy.
Demand forecasting quality
Does it project unit demand from real sales velocity and seasonality, or just average the last 30 days? Stale averages cause both stockouts and overstock.
Restock math (lead time, MOQ, safety stock)
A reorder number is only useful if it respects supplier lead time, minimum order quantity, and a configurable safety buffer. This is where spreadsheets quietly fail.
2026 Amazon fee awareness
Tools that ignore price-banded fulfillment and seasonal storage produce reorder quantities that look fine on velocity but lose money on landed cost.
Multi-location visibility
FBA, AWD, and 3PL stock have to be reconciled into one available-and-inbound number, or the forecast is working from the wrong on-hand figure.
Time to a trustworthy answer
For a 250K to 5M dollar a year operator, setup cost is real. The right tool produces a defensible reorder you can act on without a month of configuration.
Frequently asked questions
What is the best inventory management software for Amazon FBA in 2026?
There is no single best tool for every catalog. For profit-led decisions, Sellerboard is strong because inventory sits next to true net margin. For deeply configurable purchase orders, SoStocked leads. Forecastly is good for fast restock alerts, Helium 10 makes sense if you already pay for the suite, and Inventory Hero is built for sellers who want demand forecasting, restock recommendations, and 2026 fee exposure in one focused tool. Match the tool to how you actually reorder rather than to a feature checklist.
Why does 2026 change which inventory tool I should use?
Amazon's 2026 US schedule made fulfillment fees price-banded (under 10 dollars, 10 to 50 dollars, over 50 dollars) and kept storage seasonal, with standard-size storage swinging from about 0.87 dollars per cubic foot off-peak to about 2.40 dollars at peak. A restock recommendation built only on sales velocity can be profitable on units but lose money on landed cost and storage timing. Tools that model these 2026 realities produce safer reorder quantities.
Is Sellerboard or Inventory Hero better for restocking?
They optimize for different jobs. Sellerboard is a profit-and-loss platform with a capable restock module, so it is the better pick when you want inventory decisions made with full margin context. Inventory Hero specializes in demand forecasting, lead-time and MOQ aware restock quantities, and 2026 fee exposure, so it goes deeper on the reorder decision itself. Profit-analytics-first sellers often lean Sellerboard; sellers whose primary pain is stockouts and aging stock often lean Inventory Hero.
Can a spreadsheet replace Amazon inventory software?
It can until it cannot. A spreadsheet does not watch sales velocity in real time, does not reconcile FBA, AWD, and 3PL stock automatically, and does not model 2026 price-banded fulfillment fees or seasonal storage. The failure mode is silent: a stockout demotes your ranking before the sheet is updated, or peak cover ships early and pays the high storage rate. Dedicated tools exist primarily to remove that lag.
How should a 250K to 5M dollar a year FBA brand choose?
Start from your worst recurring pain. If surprise fees and thin margin are the issue, choose a profit-led tool such as Sellerboard. If complex supplier and purchase-order logic is the issue, choose SoStocked. If recurring stockouts and aging inventory are the issue, choose a forecasting-and-restock specialist such as Inventory Hero or Forecastly. Then pressure-test any tool's reorder output against the 2026 fee math before you trust it for a full quarter of cover.
Key terms
New to the vocabulary above? Plain-English definitions: sales velocity, safety stock, lead time, minimum order quantity, and long-term storage fee.
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