Inventory Planner Alternatives (2026)
Key takeaway: The Inventory Planner alternative we recommend is ReplenishRadar at $99 a month, month to month. It forecasts Shopify and Amazon as one number, builds the FBA inbound plan that Inventory Planner does not, and publishes every price. If you are leaving because a 12-month contract auto-renewed at a higher rate, every option here bills month to month except Zoho, whose headline price is annual, and Cin7, where the term varies by deal.
Use ReplenishRadar at $99 a month. It forecasts Shopify and Amazon as one number, and it is the only tool in this comparison that builds the FBA inbound shipment instead of just reading Amazon demand. The price is published, billing is month to month, and setup is about ten minutes. If you are leaving because your 12-month contract auto-renewed at a number nobody warned you about, every option below bills month to month except Zoho, which quotes an annual rate, and Cin7, where the term depends on the deal. Inventory Planner itself is a competent tool. The common reasons to leave are price, Amazon and setup time, not forecast quality.
Why people actually leave
The common reasons to leave fall into three groups, and only one of them is about forecast quality.
The first is renewal. Inventory Planner publishes one tier, Essentials, at $119.99 a month, and it covers a single Shopify warehouse. Above that you get a quote. The floor sits around $244.99 a month on a twelve-month contract that auto-renews and wants 30 days notice. Miss that window and a renewal quote above what you signed for arrives with no room to walk away.
The second is Amazon. Inventory Planner will read your FBA demand and fold it into the forecast. It will not tell you how many units to send to which fulfillment center this week. If Amazon is a real channel for you, that gap is the whole job.
The third is time to value. Multi-warehouse means a demo, then implementation, then days or weeks of setup. Some catalogs deserve that. A $2M Shopify store usually does not.
The alternatives
| Tool | Built for | Price from | Contract | Amazon | Setup |
|---|---|---|---|---|---|
| ReplenishRadar | Shopify plus Amazon | $99/mo | Month to month | Native, builds FBA inbound plans | About 10 min |
| Stockful | Shopify only, tight budget | $19.99/mo | Month to month | No | Self-serve |
| Prediko | Shopify-led DTC | $49/mo under $100k GMV | Month to month | Reads FBA stock and sales (since October 2026), no FBA plans | About 15 min |
| Sumtracker | Selling on 3 or more marketplaces | $59/mo, $119 to forecast | Month to month | Stock sync only | Self-serve |
| Zoho Inventory | Small catalogs already inside Zoho | Free to 50 orders, then $29/mo | Annual billing | Order and stock sync | Self-serve |
| Katana | Makers who assemble what they sell | Free to 30 SKUs, then a custom annual quote | Annual on the paid plan | Stock sync, no FBA plans | Days |
| Veeqo | Shipping first, inventory attached | Free shipping, $19/mo inventory | Month to month | Deep, Amazon owns it | Self-serve |
| Cin7 | Wholesale alongside DTC | $349/mo | Varies | Add-on | 1 to 8 weeks |
Start with ReplenishRadar. The paragraphs under the table describe the other seven so you can see where each differs from us.
ReplenishRadar: our recommendation
We built the thing Inventory Planner does not: the FBA inbound plan. One forecast covers Shopify and Amazon together, then it splits the buy into what stays in your warehouse and what ships to FBA, and it accounts for receiving time per fulfillment center because Amazon's centers are not equally fast. Reorder points come from measured supplier lead times rather than the number you typed in a year ago, and purchase orders round to your supplier's minimums and case packs automatically. $99 a month, month to month, 14 days free, no call. Setup is about ten minutes because it is OAuth into Shopify and Seller Central and then it backfills. Start the 14-day trial.
Stockful, a Shopify-only option at $19.99
Nineteen dollars and change buys forecasting, reorder points and purchase orders for Shopify. Against Essentials at $119.99 for one Shopify warehouse, the price gap is $100 a month. The forecast is self-tuning, so you cannot tinker with it the way Inventory Planner lets you. The limit is channels: it has no Amazon connection, so the day you add a second channel you are shopping again.
Prediko, a Shopify-first forecast you cannot inspect
$49 a month under $100k GMV, fast setup, and a forecast you cannot open up and inspect. That last part is the tradeoff. Prediko does not say what model sits behind a number, and ReplenishRadar shows each product's forecast next to what actually sold.
Cin7, a wholesale operations suite
$349 a month and one to eight weeks to implement. Nobody switches to Cin7 to save money. It is built for businesses that run wholesale and DTC out of one stock pool and need the whole operation in one system, which is a different problem from forecasting.
The ones we would not switch to for this
Sumtracker and Zoho are sync tools first. Sumtracker does forecast, but only on the $119 Replenish plan, and it is a twelve-month projection rather than the per-product tuning you are used to. Zoho gives you reorder points you set by hand. Katana is built for people who assemble products from components. Veeqo is shipping software Amazon gives away with inventory attached. All useful, none of them a like-for-like replacement for what Inventory Planner was doing for you.
What the switch actually costs
Run the arithmetic before you agonize over features. Say you are on the quote-based multi-warehouse tier at $244.99 a month, which is the floor, and your renewal came in higher.
| Line | Inventory Planner | ReplenishRadar |
|---|---|---|
| Monthly | $244.99 | $99 |
| Twelve months | $2,939.88 | $1,188 |
| Contract | 12 months, auto-renew | Month to month |
| Cost to leave early | Remainder of term | Nothing |
That is $1,751.88 a year, about the size of one mid-sized purchase order for a store this size. The saving is real but it is not the argument. The argument is the last row. A month-to-month tool has to keep earning it, and a twelve-month auto-renew does not.
Migration itself takes an afternoon. Export your closed purchase orders to CSV before you cancel, because that history is what a new tool uses to measure your actual supplier lead times, and starting without it means typing guesses into a field that decides your reorder points. Everything else, products and stock levels, comes across from Shopify and Seller Central on its own.
When ReplenishRadar is not the right fit
We plan Shopify and Amazon. Three situations point elsewhere.
- You run wholesale with a B2B portal or EDI. We have neither, and Cin7 is built for that, with eight weeks to budget.
- Bills of materials, because you make what you sell. Katana is built for that.
- A Shopify-only business where the bill is the only thing that matters. Stockful starts at $19.99 a month, though it stops at the Shopify boundary.
How to pick in one minute
Use ReplenishRadar unless one of those three is you. Amazon alone settles it for most sellers: sell there and only ReplenishRadar builds the inbound plan. On Shopify only, we show every forecast next to actual sales and measure supplier lead times from your PO history, which is what an inspectable forecast looks like.
Still not sure whether the forecast quality justifies any of this? Take your worst SKU, work out its reorder point by hand, and compare it to what your current tool says. If the two numbers are close, your problem is not the forecast and switching will not fix it.
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