Looking for a SoStocked alternative?
Two different problems send people to this search, and they have different fixes. One is a software problem. The other one only looks like it.
What SoStocked is.
SoStocked is Amazon inventory management software from the Carbon6 family, built around forecasting, restock alerts and purchase order workflows, priced per SKU. Inside its lane it is a serious product, and if you run it happily, keep running it. This page is not a teardown, because the tool is usually not the thing that failed.
If you want different software, the shortlist is below and it is short. If the numbers in the tool stopped being true, no replacement subscription fixes that, because the thing that decayed was not the algorithm.
You want different software.
Fair. Per-SKU pricing scales with your catalog, and every model has opinions you either share or fight. The usual candidates, described from their own sites:
Inventory Planner
Forecasting and replenishment, strongest in the Shopify and multichannel world, from Sage. The usual move for brands whose center of gravity is not Amazon.
RestockPro
FBA restocking, kitting and labels from eComEngine. Narrower than SoStocked, which is the point: less model to configure, less model to maintain.
A built workbook
The third option is no subscription at all: a model built once on your own catalog, in files you can open, fed from your platform exports. This is what the Engine installs. What the build covers →
What switching changes: the model, the interface, the invoice. What switching does not change: somebody still has to keep the inputs true and own the dates.
The tool was fine. Nobody owned it.
The failure pattern we see inside live accounts is almost never the forecast math. It is the inputs drifting away from reality while the recommendations stay confidently precise. Three ways it happens:
Order-ready dates move in the real world first
A supplier slips two weeks and mentions it in a chat thread, not in your software. Every downstream recommendation is now built on a date that no longer exists, and the tool has no way to know.
Two systems, two truths
The planning tool shows units inbound that Seller Central does not, or the 3PL count disagrees with both. One of those numbers is wrong, the forecast cannot tell which, and it will happily recommend a reorder against the wrong one.
Alerts are not decisions
Forty flags on a Monday morning is not a plan. Somebody turns flags into purchase orders with quantities, dates and a deposit approval, or the flags scroll off the screen and become next quarter’s stockout.
In one client catalog, 4,800 units sat invisible to planning under a duplicate SKU. No forecast can see stock filed under the wrong name. A reconciliation pass found it in week one. The documented catch →
Buy the decision, not another dashboard.
The In-Stock Engine is managed inventory planning: one build that models your catalog, then a weekly rhythm of suggested POs, transfers and risk flags, run by a senior lead with specialists behind them. It runs beside a client-owned SoStocked account or replaces the subscription with the built workbook. Both are normal. The product is the same either way: order-by dates that are owned, every week, by name.
Worth thirty minutes if you hold 50 or more SKUs of real stock on 30 to 120 day lead times. Under that, book nothing: the free map and the health score are built for exactly you.
The three questions this page gets.
Do we have to leave SoStocked to work with you?
No. The weekly cadence has run inside client accounts that plan on SoStocked, and the build works from whatever your stack is. What changes is not the software, it is that a senior lead owns the order-by dates being true every week.
Is the In-Stock Engine software?
No. It is one system build, then a weekly plan: suggested POs, transfer recommendations and risk flags, delivered by a senior lead with specialists keeping the numbers current. The deliverable is decisions with dates on them, documented as they are made.
What does it cost next to a tool subscription?
Different line items for different jobs. The build is $1,500 once, Core is $1,250 a month, Partner is $2,250, published in full on the services page. Tool pricing is set by the vendor and changes, which is why no tool prices appear on this page.
SoStocked is a product of Carbon6. Inventory Planner is a product of Sage. RestockPro is a product of eComEngine. Names appear for factual comparison only. No affiliation or endorsement is implied, in either direction.
Talk it through against your catalog.
Bring a stock report, whichever tool it comes out of. Thirty minutes later you know which SKUs are at risk in the next 90 days and where the order-by dates actually sit.