Comparison
ShelfMerge vs Inventory Planner: Detailed Comparison (2026)
Last updated: April 2026
Researched by the ShelfMerge Research Team
Inventory Planner has a strong reputation for demand forecasting and purchase order automation — and it earns it. ShelfMerge does something different: it looks at what's already in your catalog and tells you what's dead, what's redundant, and what's quietly eating your best-sellers' sales. Here's how they actually compare.
At a Glance
| ShelfMerge | Inventory Planner | |
|---|---|---|
| Price | Free — $149/mo | $99 — $299+/mo |
| Focus | Product intelligence | Demand forecasting & purchasing |
| Best for | Catalog cleanup & health monitoring | Reorder automation |
| Dead inventory detection |
Feature Comparison
| Feature | ShelfMerge | Inv. Planner |
|---|---|---|
| Dead inventory detection | ||
| Catalog health score | ||
| Variant performance analysis | ||
| Product cannibalization detection | ||
| Demand forecasting | ||
| Reorder point automation | ||
| Purchase order generation | ||
| Multi-warehouse support | ||
| Duplicate product detection | ||
| Weekly health digest email | ||
| Starting price— ShelfMerge from $29/mo; Inventory Planner from $99/mo |
Feature-by-Feature Breakdown
Demand forecasting
Inventory Planner's core strength. It uses historical sales data to forecast how much stock you'll need and when to place orders. ShelfMerge does not do demand forecasting. If your biggest pain point is knowing when to reorder, Inventory Planner wins that comparison outright.
Dead inventory detection
Inventory Planner forecasts future demand but doesn't classify existing products as dead or dying. ShelfMerge scores every product based on sales velocity, days since last sale, and stock on hand — then shows the total dollar value of stock that isn't moving.
For a catalog that's grown over several years, this distinction matters. Inventory Planner will forecast low demand for dead products but won't flag them for removal. ShelfMerge does.
Product cannibalization
Neither Inventory Planner nor most purchasing tools look at cannibalization. ShelfMerge uses Pearson correlation on weekly order data to identify products that are stealing sales from each other. Running ads to a cannibalizing product pair wastes budget — you're not growing demand, you're shifting it between two listings.
Variant analysis
Inventory Planner works at the SKU level and can forecast per variant. ShelfMerge takes a different angle: it flags variants that have never sold or haven't sold within a defined window — giving you a clear list of what to discontinue. Both are useful. They answer different questions.
Price
Inventory Planner starts at $99/month and scales with order volume — high-volume stores can pay $299/month or more. ShelfMerge Track starts at $29/month and scales to $149/month for multi-store agencies. If budget is a constraint, the gap is significant.
Pricing Comparison
ShelfMerge
- Scan — Free. 100 products, one-time health report.
- Track — $29/mo. 1,000 products, dead inventory, variant analysis.
- Optimize — $79/mo. 5,000 products, cannibalization, exports.
- Agency — $149/mo. Unlimited products, 10 stores.
Inventory Planner
- Starter — ~$99/mo
- Growth — ~$199/mo
- Pro — ~$299/mo
- Pricing scales with monthly order volume
Who Should Choose Each Tool
Choose ShelfMerge if:
- You want to find and eliminate dead inventory that's tying up cash
- You want a 0–100 catalog health score updated weekly
- You suspect products in your catalog are cannibalizing each other
- You want to audit variant performance at scale
- Your budget doesn't support $99+/mo for inventory tooling
Choose Inventory Planner if:
- Your biggest challenge is knowing when and how much to reorder
- You want automated purchase order generation and supplier management
- You have complex multi-warehouse or multi-channel inventory needs
Verdict
These tools aren't really competing for the same job. Inventory Planner is a purchasing intelligence tool — it's best at preventing stockouts and reducing overbuying. ShelfMerge is a catalog health tool — it's best at finding what's already hurting you inside your existing inventory.
Plenty of merchants use both. If you need to cut spend, start with ShelfMerge at $29/mo and run the free scan first. If you need reorder automation and have the budget, Inventory Planner is worth the premium.
Frequently Asked Questions
How much does Inventory Planner cost?
Inventory Planner pricing starts at $99/month and scales to $299/month or higher depending on order volume. ShelfMerge starts at $29/month for the Track plan.
Does Inventory Planner detect dead inventory?
Inventory Planner focuses on what to buy and when. It does not have a dedicated dead inventory scoring system, health score, or variant-level performance report.
Does ShelfMerge generate purchase orders?
No. ShelfMerge is a product intelligence tool, not a purchasing tool. It does not generate purchase orders or manage supplier workflows. For PO automation, Inventory Planner is the stronger choice.
Can I use ShelfMerge and Inventory Planner together?
Yes, and they complement each other well. Inventory Planner tells you what to buy. ShelfMerge tells you what's already dead weight and which products are competing with each other.
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