TL;DR
Retail brands running stores, marketplaces, and a website at once lose money in two directions at once: stockouts in one location and overstock in another. This guide compares five inventory management and merchandise management platforms built to close it: Impact Analytics, Increff, Nextail, O9, and Onebeat. You'll get what each one actually covers, where it fits best, and the specific modules worth testing before you commit to a contract.
Skip the top 5 list and jump straight to #1
Retailers lost $1.77 trillion in 2025 to inventory sitting in the wrong place out of stock in one store, piled up in another according to IHL Group. For a brand running stores, marketplaces, and a website at once, that gap shows up every week: a style sells out in one location while the same size sits unsold at another location. This is the exact problem inventory management software is built to solve, and the market now has more serious options than a planner juggling spreadsheets can fairly compare alone.
What retail merchandising actually covers
Deciding what to sell, where to distribute it, how much volume to purchase, and when to apply markdowns constitutes the core of Retail Merchandising.
Demand moves by city, by store, by week, sometimes by weather. Add a second or third channel, and the same SKU can be overstocked in one location and out of stock in another at the same time. Good merchandise planning is what keeps that mismatch from turning into lost sales on one side and dead stock on the other.
Most teams need forecasting, allocation, replenishment, and pricing working together to stay ahead of it, which is why a growing number of brands are moving off spreadsheets and onto dedicated inventory management software.
See how retail assortment planning software handles multi-channel complexity.
What to look for in an inventory management solution
A merchandising platform does more than display dashboards; it should help a planner decide, act, and adjust mid-season. Look for these capabilities:
- Demand forecasting: predicts SKU and store-level demand from historical sales, seasonality, and trend signals
- Inventory optimization: recommends reorder quantities and safety stock, and flags where overstock or stockouts are building
- Assortment planning: builds the right product mix by store, cluster, and channel
- Pricing strategy: supports price moves based on demand, competition, and margin targets
- In-season management: flags what's working and what isn't, and recommends the next action: replenish, transfer, or mark down
- Collaboration tools: keeps buyers, planners, and supply teams working off one shared view
- Data visualization: dashboards a planner can read without pulling in an analyst
- Integration: connects to POS, ERP, and other retail systems so decisions aren't made on stale data
When comparing platforms, it's worth checking each one against standard retail benchmarks inventory turnover, GMROI, and service-level targets rather than a vendor's own framing.
Want to know more about the essential modules of assortment planning modules?
Which Top 5 Global Merchandising Solutions Should You Consider
Below are five platforms currently used at scale across retail. Each is built for a different combination of category, trade velocity, store count, and planning maturity so best depends on which of those match your business.
Increff
Increff's merchandising software supports planners, buyers, and merchandisers across the full inventory lifecycle from purchase through markdown, in both pre-season and in-season. It runs on more than 100 customizable, patent-pending algorithms built specifically for fashion and lifestyle retail.
It covers planning and buying through allocation, working from actual demand rather than assumed demand, to improve sales, profitability, and inventory efficiency while lowering cost. If your merchandise planning has to deal with store-level depth, broken size runs, and fast-moving trends, this is built for exactly that mess.
Modules:
- Planning & buying, including future inventory projection and reordering, down to design-attribute level
- Allocation & Replenishment and interstore transfer, using store-style ranking to guide distribution
- Regional Utilization, multi-warehouse distribution that cuts delivery time and logistics cost
- Markdown Optimization, a first-principles engine that recommends discounts by style and store
- Merchandise Financial Planning, tying budgets to margin, revenue, and COGS targets
- Business intelligence dashboards built for every role from store manager to CEO
What stands out: a True Rate of Sale metric that corrects for lost sales and discount-driven spikes, store-style ranking that prioritizes allocation where it matters, fewer overstock and understock situations, buying support for new stores with no sales history, and a data model built around your own data rather than a generic template.
If you're comparing merchandise management software, ask Increff specifically how it handles store clustering, size curves, and in-season transfers that's usually where a platform either earns its keep or falls short.
Impact Analytics
Impact Analytics is built around localizing assortments and personalizing the customer experience using AI, with the pitch centered on better product selection, pricing, and promotion decisions from the underlying data.
Modules: demand forecasting across the product lifecycle; assortment and financial planning with Open-to-Buy budgeting; AI/ML-driven pricing and promotions; allocation with space-aware planograms and shelf monitoring; and business intelligence reporting.
What retailers get: AI-driven assortment decisions, dynamic and competitive pricing, personalization based on customer behavior, and faster deployment with visible early results.
Nextail
Nextail centers on AI-driven forecasting paired with real-time allocation, replenishment, and markdown decisions, aimed at cutting waste and keeping teams responsive when a trend shifts mid-season.
Modules: assortment planning with AI recommendations and simulation; buying and reordering from local demand forecasts; first allocation and replenishment; inter-store rebalancing to fix broken size sets; and event-driven elasticity and baseline recalculation.
What retailers get: hyper-local demand anticipation, real-time visibility into demand swings, lower holding costs, and replenishment that tracks actual customer demand rather than a fixed schedule.
O9
O9 Solutions integrates supply chain and merchandise planning into one platform, aimed at retailers that need end-to-end visibility across functions, especially at higher scale and complexity.
Modules: integrated business planning across functions; AI-supported demand forecasting; assortment, allocation, and trend-based planning; multi-tier replenishment; merchandise financial planning across a global network; and unified markdown management.
What retailers get: tighter collaboration between supply chain and merchandising teams, more accurate forecasts, cost reduction from fewer manual decisions, and scalability as the business grows.
Onebeat
Onebeat focuses on demand forecasting, inventory optimization, and replenishment recommendations, combining historical sales data with real-time signals to reduce excess stock and improve turnover.
Modules: AI-driven forecasting using both bottom-up and top-down methods; store-specific assortment management; smart replenishment and allocation targeting peak sales; inter-store transfer rules for broken sizes and seasonal variation; and event and slow-mover planning.
What retailers get: better forecasting accuracy, tighter inventory turnover, lower carrying costs, and faster execution through AI-driven recommendations.
Conclusion
Merchandising software isn't optional for most brands running more than a handful of doors and a website. It's what keeps decisions accurate and margin protected when demand moves unpredictably, which it does often.
The right platform shapes how your planning team actually works week to week — match it to your category, scale, and goals rather than a feature checklist. All five systems above can support better merchandise decisions; the one worth paying for is the one your team will actually use.
If your current process still runs on spreadsheets, late nights, and one planner's tribal knowledge, that's usually the sign a proper inventory management system is overdue.