ReplenishRadar vs Inventory Planner: Shopify-Only Forecasting vs Multi-Channel Planning

Inventory Planner is well-known in the Shopify world for planning purchases. ReplenishRadar is built for sellers who operate across Shopify and Amazon and want one place to plan reorders and FBA restocking.

TL;DR decision

• Choose ReplenishRadar if you sell on Shopify plus Amazon and want unified planning plus FBA workflows with public pricing.
• Choose Inventory Planner if you are Shopify-only and want a forecasting and purchasing workflow that is deeply centered on Shopify.

What you are actually deciding

1. Channel scope: Shopify-only planning vs unified Shopify plus Amazon planning.
2. Amazon depth: do you need restock limits, transfers, and inbound visibility?
3. Workflow style: action-first outputs vs model tuning and configuration.
4. Pricing: public tiers vs quote-based or varying tiers.

How ReplenishRadar is built for multi-channel operators

ReplenishRadar is designed to reduce planning overhead:

• Unified inventory view across Shopify, Amazon FBA, and warehouse stock
• Demand forecasting and days-to-stockout across channels
• Reorder recommendations tied to lead times and safety stock
• Purchase order drafts and exports
• FBA restock suggestions, manifest export, and inbound plan creation through Amazon
• Forecast accuracy validation: predictions compared against actual sales so you can see where your forecasts are reliable and where they need attention
• Ordering constraints: MOQ, casepack, and order multiples enforced automatically across all purchase orders and transfers

Where Inventory Planner fits better

Inventory Planner is typically a better fit when:

• Your business is mostly or entirely Shopify.
• You want a planning tool that has been in-market for years and is optimized around Shopify workflows.
• Your team prefers a planning suite that centers on detailed purchasing and reporting inside Shopify context.

Critical differences that matter

Decision factor	ReplenishRadar	Inventory Planner
Primary job	Multi-channel planning for Shopify plus Amazon	Shopify-centered forecasting and purchasing
Amazon FBA workflows	Built-in (Amazon integration, manifest export)	Not the core focus
FBA inbound plan creation	Yes, directly through Amazon	Not available
Forecast accuracy validation	Built-in (predictions vs actuals comparison)	Not a primary feature
Ordering constraints (MOQ, casepack)	Automated enforcement	Manual or limited
Unified view across channels	Yes	Typically Shopify-first
Setup	OAuth connect	Shopify app
Pricing transparency	Public tiers: $99/$199/$499 per month	Quote-based, floor ~$245/mo
AI agent integration (MCP)	Built-in MCP server for Claude, Cursor, and custom AI agents	Not available

Pricing and onboarding

ReplenishRadar pricing is public by SKU tiers: Standard $99/month, Growth $199/month, Scale $499/month. Connect your store for a free Inventory Health Report before committing to a paid plan.

Inventory Planner uses a "utility pricing model" based on the volume of inventory you manage. Specific prices are not listed publicly -- you request a quote. Third-party sources suggest a floor around $245/month. If pricing clarity matters early, ReplenishRadar removes the pricing discovery step.

Bottom line

If you are Shopify-only and want a Shopify-centered planning tool, Inventory Planner can fit. If you are Shopify plus Amazon and want unified planning and FBA workflows with clear pricing, choose ReplenishRadar.

Get your free Inventory Health Report → Connect your store and see how ReplenishRadar unifies your Shopify and Amazon inventory in minutes. No credit card required.

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Related Reading:

• Shopify Inventory Forecasting Guide
• Multi-Channel Inventory Challenges
• Connect an AI Agent to Your Amazon and Shopify Inventory

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Sources

Competitor information is based on publicly available data as of March 2026. Features and pricing may change.

• Inventory Planner by Sage on Shopify App Store
• Inventory Planner pricing page
• ReplenishRadar pricing and features pages