Inventory Planner

Inventory Planner is a demand-forecasting and inventory-buying platform for retailers, ecommerce brands, wholesalers, and discrete manufacturers. It is best suited to teams coordinating varied ranges and stock across several locations, particularly when its connectors match their existing systems. The main decision is whether its broad planning scope justifies custom pricing and a guided implementation process.

Overview

Founded in 2012 and now part of Sage Group, Inventory Planner connects demand forecasts with purchasing work. Its remit covers seasonal and non-seasonal products, retail and wholesale operations, and inventory held in multiple locations. A custom forecast horizon and no stated SKU limit make it suitable for expanding catalogues, while the product is less attractive to buyers looking for an instant, self-serve setup.

Key features

Forecasting and new products

Configurable models account for seasonal and non-seasonal patterns and can be adapted for retail or wholesale products. Automated adjustments to sales patterns reduce the need to treat every item identically, although the usefulness of that flexibility depends on configuring models to match the business. For new products, the system can use sales history from similar items, giving planners a starting demand signal before the new SKU has much of its own history.

Purchasing and locations

Supplier management, purchase planning, minimum-order-quantity handling, and open-to-buy budgeting turn forecasts into buying actions. That combination is more practical for purchasing teams than a forecasting tool that ends with a demand number. Multi-location purchasing recommendations and warehouse-transfer recommendations help coordinate stock placement between sites, making the platform a stronger fit for distributed operations.

Connections, API, and security

Native connections include Shopify, BigCommerce, Amazon, eBay, Brightpearl, Cin7, QuickBooks, and other sales, management, fulfillment, and accounting platforms. Where a native option is not available, Starter CSV, Advanced CSV, and Snowflake connectors provide alternate data routes. Support covers Inventory Planner's native connectors; a non-native third-party connector is outside that support boundary.

The beta API offers real-time account access through Stock Orders and Reports APIs. It cannot currently push product or variant data, so organisations that need API-based catalogue writes should plan around that restriction. Administration access uses TLS encryption, databases are dedicated per client, and user-level access controls are described. Backups run every 24 hours, with complete copies retained for three days and roll-up backups available over a three-month window.

Pricing

The Custom pricing plan is priced according to inventory volume and includes unlimited users at no extra cost. That user policy suits organisations with broad buying, operations, and finance participation, but the absence of a published figure means budgeting requires a sales conversation. There is no stated SKU ceiling, which is useful for large assortments, yet the eventual quote remains the key commercial variable.

Guided implementation and training are required, and onboarding averages within 30 days. This gives teams a defined deployment path but rules out treating the product as a quick sign-up purchase; allow time and internal capacity for implementation before relying on it operationally.

Platforms

Inventory Planner is offered through the web and an API. The web application covers planning and purchasing workflows, while the beta API is primarily an account-data access route through Stock Orders and Reports rather than a complete product-data write interface.

Who it's for

Retailers, ecommerce brands, wholesalers, and discrete manufacturers with complex assortments or multiple inventory locations are the clearest audience. It is particularly appropriate when purchasing decisions must account for supplier constraints, minimum order quantities, budgets, and transfers between warehouses. Smaller teams that want transparent pricing, no required onboarding, or API-driven product-data updates should look carefully at those trade-offs before choosing it.

Pros and cons

• Pro: Configurable seasonal, non-seasonal, retail, and wholesale forecasting supports mixed product portfolios.
• Pro: Similar-item history can inform forecasts for new products with limited sales data.
• Pro: Purchasing, supplier, minimum-order, open-to-buy, and transfer recommendations connect planning to execution.
• Pro: No stated SKU limit and unlimited users on the custom plan remove two common scaling constraints.
• Con: Pricing is custom and based on inventory volume, so costs cannot be assessed from a published rate.
• Con: Required guided implementation and training, averaging within 30 days, make adoption a planned project rather than an immediate self-serve start.
• Con: Beta API users cannot push product or variant data, limiting automation for catalogue workflows.
• Con: Support does not cover third-party non-native connectors, which can add responsibility for integration maintenance.

Alternatives

For a broader starting point, browse the Replenishment Software, Forecasting Software, and Demand Planning Software lists.

• GMDH Streamline is the better first look for a freemium option: its Free Edition costs nothing and caps planning at 1,000 planning items, US$1M in annual revenue, and 10,000 annual sales quantity.
• Demandsoft Replenishment Solutions (PRIME One) is a paid, web-based alternative.
• LEAFIO AI Replenishment Software is a paid API and web product with custom pricing and a demo-and-quote process.
• pacemaker.ai Replenishment Decision Intelligence is another paid option available through API and web platforms.
• Retalon Price Management and Optimization is a paid web product with demo-by-request pricing.
• Blue Ridge Replenishment Optimization is a paid web alternative requiring a demo booking.
• Retano SCM offers paid self-hosted and web deployments, with purchasing options including on-prem, SaaS, and subscription.
• Slimstock Slim4 is a paid self-hosted and web platform whose quote depends on supply-chain complexity and required functionality.

Verdict

Choose Inventory Planner when your organisation needs forecasting tied directly to purchasing, supplier constraints, budgets, and stock transfers across locations, and can accommodate custom commercial terms and a month-scale onboarding process. Its broad model coverage, unlimited-user policy, and no stated SKU limit are compelling for growing operations. Look elsewhere if published pricing, rapid self-service deployment, third-party integration support, or API-based product-data updates is more important than that planning breadth.