Best Amazon FBA Inventory Tools (2026)

Seller Central Is a Starting Point, Not a Solution

Amazon gives you basic inventory management in Seller Central. You can see stock levels, check your IPI score, and get restock recommendations. Those recommendations are often wrong. I have seen Seller Central suggest sending 2,000 units of a product that sells 5 per day, which is over a year of supply. Follow that advice and your IPI will crater.

Serious FBA sellers need better demand forecasting, restock limit awareness, and transfer planning. Here are the tools worth considering, and which one fits depending on how you sell.

The Short Version

If you sell on Amazon and Shopify, ReplenishRadar is the best fit. It coordinates inventory planning across both channels with FBA-aware transfer suggestions.

If Amazon is 90%+ of your business and Shopify is not in the picture, SoStocked or RestockPro are built for that workflow.

Comparison Table

Prices below are as of October 2026, checked against each vendor's own pricing page.

Tool	Best For	Multi-Channel	FBA Depth	Price From
ReplenishRadar	Amazon + Shopify	Yes	Transfer planning	$99/mo
SoStocked	Amazon-only	Limited	Deep	$175/mo
RestockPro	FBA restocking	Limited	Deep	$49/mo
Veeqo	Free shipping, paid inventory	Some	Basic	Free shipping, $19/mo inventory
Inventory Planner	Large catalogs	Yes	Yes	Custom quote

ReplenishRadar: Best for Multi-Channel FBA Sellers

Full disclosure: this is our product. But we built it because I spent years trying to coordinate Amazon and Shopify inventory in spreadsheets and kept getting burned. The core problem: your warehouse stock serves two masters. FBA needs replenishment. Shopify needs fulfillment stock. Without a unified view, one channel steals from the other.

ReplenishRadar connects to both channels, forecasts demand across them, and generates FBA restock suggestions that account for what you need to keep for Shopify. It does not read your restock limits, so check those in Seller Central. You get a single inventory position across FBA, warehouse, and Shopify locations, with days-to-stockout calculations that factor in inbound shipments.

Pricing is $99-$499/month based on SKUs, stores, and sales line item volume. free inventory report.

Where it is not the right fit: if you are Amazon-only and do not plan to add Shopify, the multi-channel features are wasted. Go with SoStocked instead.

SoStocked: Best for Amazon-Only Planning

SoStocked is built specifically for Amazon sellers. Deep FBA workflow integration, Amazon-centric forecasting, and shipment planning designed around how Amazon sellers actually work. If Amazon is your whole business, this is a strong choice.

The limitation is the flip side of its strength. Limited multi-channel support means sellers who add Shopify or other channels later often outgrow it.

If Amazon is 90%+ of revenue and likely to stay that way, SoStocked fits well. As of October 2026, SoStocked publishes a single "Inventory + Profit" plan at $175/month, with a free trial.

RestockPro: Best for FBA Replenishment Focus

RestockPro focuses heavily on the FBA restocking workflow. Replenishment recommendations, supplier management, purchase order creation, and sales forecasting tuned for Amazon. If your biggest pain is figuring out when and how much to send to FBA, RestockPro is narrowly focused on that problem.

Same limitation as SoStocked: Amazon-centric. Multi-channel depth is limited. As of October 2026, eComEngine lists RestockPro starting at $49/month, with annual plans available.

Veeqo (Amazon-Owned): Free Shipping, Paid Inventory

Amazon bought Veeqo and made its shipping features free for every seller, and that part has not changed: label printing and rate shopping across carriers still cost nothing. What has changed is the inventory side. As of October 2026, Veeqo's inventory and demand-forecasting plan starts at $19/month, priced by order volume, with a $350/month High Volume tier for ERP integrations and dedicated support. If you only need shipping, Veeqo is still free. If you want its forecasting, budget for the inventory plan.

Veeqo is also still not primarily a forecasting tool even on the paid tier. It shows you what you have and syncs stock across channels. For demand prediction, you need dedicated planning software.

Inventory Planner: Best for Large Catalogs

Inventory Planner handles high SKU counts (500+) with granular forecasting parameters. Multi-marketplace support, including Amazon. Sophisticated controls for sellers who want to tune their forecasting model.

The tradeoff: steeper learning curve and higher price point. If you have 50 SKUs, this is overkill. If you have 2,000 and a team that will invest in setup, it is worth evaluating. As of October 2026, Sage no longer publishes fixed tiers for Inventory Planner; pricing is a custom quote based on order volume and SKU count. See our full ReplenishRadar vs Inventory Planner comparison for the Amazon-specific gaps.

What to Look For in an FBA Inventory Tool

Restock limit awareness. FBA limits are real constraints, not suggestions. A good tool tracks your current limit utilization, identifies which SKUs are burning your capacity without selling fast enough, and plans shipments within your available space.

Demand forecasting that is better than Amazon's. Seller Central's recommendations use basic averages. Look for tools that incorporate seasonality detection, trend identification, and lead time awareness. I have seen Amazon recommend 60 days of supply for a product about to enter its slow season. That is a recipe for excess inventory fees.

Transfer planning. A good tool tells you to send 300 units by Friday to avoid stocking out, and how much room that leaves in your restock limit, not just that you are low on the SKU. The specificity matters.

Multi-channel coordination (if applicable). If you also sell on Shopify, a tool that only sees Amazon will blind-spot you on the other half of your demand. Unified forecasting accounts for total demand, not just one channel.

How to Decide

The decision is simpler than it looks. Two questions:

Are you Amazon-only or multi-channel? Amazon-only sellers should look at SoStocked or RestockPro. Multi-channel sellers (especially Shopify + Amazon) should look at ReplenishRadar or Inventory Planner.

Do you need forecasting or just inventory tracking? If you just want to see stock levels and print shipping labels, Veeqo is free and fine. If you want to predict when you will stock out and get told when to reorder, you need a planning tool.

For most sellers reading this, running Shopify and Amazon with 50-500 SKUs, ReplenishRadar is the right answer. For Amazon-only sellers with no plans to go multi-channel, SoStocked handles the job.

Start a free ReplenishRadar trial and see your FBA inventory alongside Shopify ->

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Related Reading:

• Amazon FBA Inventory Limits Explained
• Amazon FBA Restock Strategies
• Multi-Channel Inventory Challenges
• ReplenishRadar vs SoStocked