ReplenishRadar vs inFlow: E-commerce Planning vs B2B Inventory

inFlow is a popular inventory management tool, and for good reason. If you run a B2B wholesale operation, manufacture products, or manage a brick-and-mortar shop with a back office, inFlow is well-built for that world.

It is not built for the world most of our users live in: selling finished goods on Shopify and Amazon, managing FBA replenishment, and trying to forecast demand across multiple channels.

What inFlow is designed for

inFlow started as a desktop inventory app for small businesses. It has grown into a capable tool for B2B orders, manufacturing workflows, barcode scanning, and showroom/sales team management. The B2B sales order flow is genuinely good -- quotes, invoicing, customer-specific pricing, sales reps.

If you sell pallets of product to retailers and need to track that workflow, inFlow makes sense.

The e-commerce gap

Here is where it breaks down for marketplace sellers.

Third-party Amazon integration. inFlow does not connect to Amazon natively. You need a third-party connector or middleware to sync orders and inventory. Every middleman in the chain adds latency, cost, and a failure point. I have watched sellers debug sync issues for days because their connector dropped orders silently. Native integrations matter more than people think until they get burned.

No demand forecasting. inFlow has reporting. It can tell you what sold last month. It cannot tell you what will sell next month. There is no statistical forecasting, no trend detection, no seasonality adjustment. If you are placing reorders based on inFlow data, you are doing the forecasting yourself in a spreadsheet or in your head. That works until it does not, usually right around the holiday season.

No FBA workflow. inFlow has no concept of FBA inbound plans, transfer suggestions, restock limits, or days-to-stockout for FBA inventory. If Amazon is a meaningful part of your business -- and for many sellers it is 40-70% of revenue -- that is a big blind spot.

No channel-level demand splitting. When you sell on both Shopify and Amazon, you need to understand demand by channel to make good replenishment decisions. How much to send to FBA vs keep in your warehouse for Shopify orders? inFlow tracks inventory in locations, but it does not model demand per channel to inform those allocation decisions.

Feature comparison

Capability	inFlow	ReplenishRadar
Starting price	$129/mo (annual) or $161/mo (monthly)	$99/mo
Shopify integration	Available	Native (OAuth)
Amazon integration	Third-party connectors	Native (SP-API)
Demand forecasting	None	Statistical models with trends and seasonality
Days-to-stockout	No	Yes, per SKU per channel
FBA inbound plan creation	No	Yes, via Amazon SP-API
B2B sales orders / quotes	Built-in (strength)	Not included
Manufacturing / BOM	Supported	Not included
Barcode scanning	Built-in	Not the focus
Reorder point automation	Manual setup	Automatic with safety stock
Multi-channel demand view	No	Unified across Shopify and Amazon

A pricing note

inFlow's Entrepreneur plan runs $129/month on annual billing or $161/month on monthly. That is 30-60% more than ReplenishRadar's starting tier of $99/month. The difference in what you get for that money is sharper than the price gap suggests. With inFlow, you get inventory tracking and B2B workflows. With ReplenishRadar, you get demand forecasting, stockout prevention, and FBA planning. Different price points, very different tools.

If you need both B2B order management and e-commerce demand planning, you might genuinely need two tools. But do not buy a B2B tool hoping it will also plan your Amazon replenishment. It will not.

Who should use inFlow

inFlow fits when your business looks like this:

• You sell B2B wholesale and need quotes, invoicing, and customer-specific pricing
• You manufacture products and need BOM tracking
• Your sales team needs a showroom or catalog tool
• E-commerce marketplaces are a small or nonexistent part of your revenue

Who should use ReplenishRadar

ReplenishRadar fits when your business looks like this:

• You sell on Shopify and Amazon (or plan to)
• You buy finished goods and resell them
• Stockouts and overstock are measurably hurting your margin
• FBA replenishment is a regular part of your operations
• You want forecasting that actually accounts for trends, not just last month's sales

We built ReplenishRadar specifically for this profile. Not because B2B inventory is not important, but because e-commerce marketplace sellers have different problems that need different tools.

Try ReplenishRadar free for 14 days -> -- connect Shopify and Amazon, see your demand across channels in one place.

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Related Reading:

• Best Multi-Channel Inventory Software
• Multi-Channel Inventory Challenges
• Shopify Inventory Sync Best Practices

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Sources

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

• inFlow Inventory product pages and feature documentation
• inFlow Inventory pricing page
• ReplenishRadar pricing and features pages