What is the best Inventory Planner alternative?

For a store selling on both Shopify and Amazon, ReplenishRadar at $99 a month, because it is the only tool here that builds the FBA inbound shipment rather than just reading Amazon demand. For a Shopify-only store watching costs, Stockful at $19.99 a month. Both are month to month with no sales call.

How much does Inventory Planner cost in 2026?

One public tier, Essentials, at $119.99 a month for a single Shopify warehouse. Multi-warehouse pricing is quote-based with a floor around $244.99 a month on a 12-month contract that auto-renews and needs 30 days notice to cancel.

Why do sellers leave Inventory Planner?

Three reasons in the order I hear them: the renewal price jumped, they added Amazon and found it reads FBA demand but will not build the inbound shipment, or the quote-based multi-warehouse tier costs more than the problem it solves.

Is there a free Inventory Planner alternative?

No, not one that forecasts. Katana is free up to 30 SKUs but its forecasting is basic, and Veeqo gives away shipping software with inventory attached. If you are under about 50 products, a spreadsheet and a reorder point are genuinely fine.

Can I keep my purchase order history when I switch?

Usually yes, as a CSV export of closed POs. That history is worth carrying because it is what lets a new tool measure your real supplier lead times instead of asking you to type in a guess.

Inventory Planner Alternatives (2026)

If you sell on Shopify only and you are leaving over price, use Stockful at $19.99 a month. If you also sell on Amazon, use ReplenishRadar at $99 a month, because it is the only tool in this comparison that builds the FBA inbound shipment instead of just reading Amazon demand. 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. Most people who leave are not leaving because it forecasts badly.

Why people actually leave

I have read a lot of switching threads and the reasons cluster into three, 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, and brands report renewal quotes well above what they signed for. That is the complaint I see most.

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. Most $2M Shopify stores do not.

The alternatives

Tool	Best 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-only DTC	$49/mo under $100k GMV	Month to month	No	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 $299/mo	Month to month	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

Eight rows, and six of them are wrong for you. The paragraphs sort out which.

Stockful, if the problem is the bill

Nineteen dollars and change, forecasting, reorder points, purchase orders, Shopify only. If you are on Essentials at $119.99 for one Shopify warehouse and you do not sell anywhere else, this is a straight $100 a month saving for roughly the same job. The forecast is self-tuning, which means you cannot tinker with it the way Inventory Planner lets you. For most stores under a couple of thousand products that is a feature.

ReplenishRadar, if the problem is Amazon

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.

Prediko, if you are Shopify-only and want AI to decide

$49 a month under $100k GMV, fast setup, and a forecast you cannot open up and inspect. That last part is the tradeoff. Some people want the number; some want to know why the number is what it is. If you are the first kind, Prediko is cheaper than Inventory Planner and quicker to start.

Cin7, if you are actually a wholesaler

$349 a month and one to eight weeks to implement. Nobody switches to Cin7 to save money. You switch because you run wholesale and DTC out of one stock pool and you need the whole operation in one system, which is a different problem from forecasting.

The ones I 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, which for most stores is one mid-sized purchase order. 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.

How to pick in one minute

Start with Amazon, because it eliminates most of the table. Sell there and only ReplenishRadar builds the inbound plan, so the decision is already made. Otherwise the question is what you want to do with the forecast: inspect it and argue with it, in which case Stockful is the cheapest competent option, or hand it to a model and never open it, which is Prediko. Wholesale changes the answer entirely and puts you on Cin7 with eight weeks to budget.

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.

Inventory Planner Alternatives (2026)

Why people actually leave