ReplenishRadar vs Katana: E-commerce Resellers vs Manufacturers

Katana is a manufacturing tool. Full stop. It does manufacturing well -- bills of materials, production scheduling, shop floor management, raw material planning. If you make physical products in a factory or workshop, Katana is purpose-built for that.

But I talk to sellers every month who signed up for Katana because it looked modern and had a Shopify integration, only to realize they are paying $299+/month for manufacturing features they will never touch. Katana restructured pricing in 2025 -- there is now a free tier for up to 30 SKUs, then a Core plan at $299/month with manufacturing as a $199/month add-on. If you buy finished goods from suppliers and resell them on Shopify and Amazon, Katana is the wrong tool.

The MRP problem

MRP stands for Manufacturing Resource Planning. Katana's entire architecture is built around this concept: you have a bill of materials, you need raw inputs, you schedule production runs, you track work orders through your shop floor.

None of that applies if you are a reseller. You do not have a BOM. You do not schedule production. You buy finished goods in cases from a supplier, receive them into your warehouse, and send them to FBA or ship them from Shopify orders.

Buying an MRP system for a reselling business is like buying a tractor to mow a quarter-acre lawn. It will technically work. It is also $179/month of overkill.

What Katana does well (for manufacturers)

I want to be fair. For the right business, Katana is genuinely good:

• Bill of materials with multi-level sub-assemblies
• Production scheduling and shop floor control
• Raw material tracking and purchasing
• Real-time manufacturing cost tracking
• A clean, modern interface (compared to legacy MRP software, this matters)

If you assemble or manufacture products, Katana is worth evaluating. We are not competing for those customers.

Why Katana fails for resellers

You pay for features you do not use. Katana's value proposition is manufacturing. Every dollar of development goes toward BOM management, production workflows, and shop floor tools. At $299/month for Core plus $199/month for the manufacturing add-on, most of what you are paying for is irrelevant to reselling. The free tier (30 SKUs) is too limited for any real business.

Limited Amazon integration. Katana connects to Shopify reasonably well, but Amazon support is limited. There is no FBA inbound plan creation via SP-API, no transfer suggestions, no FBA-specific inventory tracking. For sellers where Amazon is 50%+ of revenue, this is a dealbreaker.

Forecasting is manufacturing-flavored. Katana has demand forecasting in some tiers, but it is built around production planning. It answers "how much should I manufacture?" not "how much should I reorder from my supplier and how should I split it between my warehouse and FBA?" Those are different questions.

No channel-level demand planning. Resellers selling on multiple channels need to see demand per channel and allocate inventory accordingly. How much to send to FBA? How much to keep for Shopify fulfillment? Katana does not model this because manufacturers typically sell through one channel or fulfill from a single production facility.

Feature comparison

Capability	Katana MRP	ReplenishRadar
Starting price	Free (30 SKUs) or $299/mo (Core)	$99/mo
Bill of materials / BOM	Core feature	Not included (not needed for resellers)
Production scheduling	Core feature	Not included
Shopify integration	Good	Native (OAuth)
Amazon integration	Limited	Native (SP-API)
FBA inbound plan creation	No	Yes, via Amazon SP-API
Demand forecasting	Manufacturing-focused (higher tiers)	E-commerce-focused with trends and seasonality
Days-to-stockout	No	Yes, per SKU per channel
Safety stock with lead time variability	No	Yes
Reorder point automation	No	Yes
MOQ / casepack enforcement	Manufacturing-oriented	Built for purchasing finished goods

The cost math

Katana Core costs $299/month. Add manufacturing management at $199/month and you are at $498/month before warehouse management or onboarding ($2,000 one-time). ReplenishRadar's growth tier costs $199/month. That is $3,600/year in savings on the base comparison alone, and you are getting a tool built for your actual workflow instead of one built for a different business model.

I have seen sellers spend 6 months trying to make Katana work for their reselling operation, eventually give up on the manufacturing features, and switch to something simpler. That is 6 months of paying for the wrong tool. Do not do that.

Who should use Katana

Katana is the right pick when:

• You manufacture or assemble your own products
• You need BOM tracking and production scheduling
• Your shop floor workflow is your operational bottleneck
• You sell primarily through Shopify (not heavy Amazon/FBA)

Who should use ReplenishRadar

ReplenishRadar fits when:

• You buy finished goods from suppliers and resell them
• You sell on Shopify and Amazon
• FBA replenishment is a regular part of your workflow
• You need demand forecasting and automated reorder recommendations
• You do not manufacture anything

The dividing line is simple. Do you make things or buy things? If you make things, look at Katana. If you buy things and resell them, ReplenishRadar is built for you.

Try ReplenishRadar free for 14 days -> -- built for resellers, not factories.

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Related Reading:

• Best Shopify Inventory Management Software
• Amazon FBA Restock Strategies
• Inventory Forecasting 101
• Casepack and MOQ Guide for Amazon FBA

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Sources

Competitor information is based on publicly available data as of February 2026. Features may change.

• Katana MRP product pages and feature documentation
• Katana MRP pricing page
• ReplenishRadar pricing and features pages