Demand Planning Software (2026): 10 Tools by Company Size

Get demand wrong and you lose twice: once in cash tied up in stock nobody wants, and again in sales lost to stockouts. A good demand planning tool won't make the future certain, but it'll make your forecasts consistent, explainable and quicker to fix.

The ten tools below are listed alphabetically and in no particular order, and every description comes from each vendor's own website, read as of Oct 2026. If you're a small business still on spreadsheets, start with my guide to inventory management software, because demand planning sits on top of clean stock data.

Demand planning tools at a glance

I checked the free plan column on each vendor's own website, as of Oct 2026. Yes means the page names a free plan, a free version or an open source edition. Trial only means it names a time-limited free trial. Not stated means the page I read named neither, so check the vendor's own site before you sign up.

Tool	Type	Good for	Free plan
Anaplan	Connected planning platform	Demand planning linked to finance and sales plans	Not stated
Flieber	Inventory intelligence for brands	Demand and inventory forecasting for multichannel brands	Trial only
GAINSystems	Supply chain planning suite	Demand planning with inventory optimization	Not stated
Lokad	Quantitative supply chain optimization	Forecasts that update as fresh data arrives	Not stated
Netstock	Supply and demand planning	Forecasting, ordering and S&OP for mid-sized firms	Not stated
o9 Solutions	Enterprise planning platform	Demand, supply and IBP in one AI platform	Not stated
Prediko	AI inventory planner for Shopify	Demand planning for Shopify brands	Trial only
RELEX Solutions	Retail and supply chain planning	Demand sensing for retailers and manufacturers	Not stated
Slimstock	AI-powered supply chain planning	Demand forecasting by customer and channel	Not stated
ToolsGroup	Supply chain planning suite	Probabilistic forecasting and demand sensing	Not stated

Ten demand planning and forecasting tools

Anaplan

Best for: Enterprises that want demand, inventory and integrated business planning connected to finance, sales and workforce plans in one platform.

Flieber

Best for: Multichannel brands and agencies wanting demand and inventory forecasting with replenishment workflows that AI agents can reach through MCP or API.

GAINSystems

Best for: Distributors and manufacturers wanting demand planning and forecasting tied to inventory optimization, replenishment and scenario modelling with a digital twin.

Lokad

Best for: Retail, aerospace, fashion and manufacturing firms wanting machine learning forecasts that update as fresh data arrives, feeding purchasing, allocation and stock decisions.

Netstock

Best for: Mid-sized distributors and manufacturers wanting demand planning, inventory forecasting, ordering and S&OP, with supplier performance tracking alongside.

o9 Solutions

Best for: Large enterprises wanting demand planning, supply chain planning and integrated business planning unified in one AI platform it calls the Digital Brain.

Prediko

Best for: Shopify and e-commerce brands wanting an AI demand plan tied to a revenue target, plus a 12-month purchase order calendar and restocking suggestions.

RELEX Solutions

Best for: Retailers and manufacturers wanting demand planning and demand sensing linked to store ordering, fresh planning and space and assortment.

Slimstock

Best for: Companies wanting demand forecasting by customer and channel, demand sensing and inventory optimisation inside one planning platform.

ToolsGroup

Best for: Manufacturers and distributors wanting probabilistic demand forecasting, collaborative planning, demand sensing and demand shaping as part of a wider planning suite.

Demand planning is now a module, not a product

Here's what the vendor pages show. ToolsGroup's home page leads with always-on intelligence for supply chain planning, Slimstock calls itself AI-powered supply chain planning, and Netstock sells supply and demand planning software. Hardly anyone sells demand planning on its own any more.

That matters because you're often buying a suite. Ask which modules you need on day one, and whether demand planning works without inventory optimization or S&OP switched on.

Shopify brand, mid-sized distributor or global enterprise?

• E-commerce brands. Tools built for Shopify and multichannel sellers forecast by SKU and channel and turn the result into purchase orders. They're quick to set up and connect to your store directly.
• Mid-sized distributors and manufacturers. These tools add forecasting, inventory optimization and S&OP on top of your ERP data, without a long enterprise project.
• Enterprises. Full planning suites link demand to supply, production, finance and integrated business planning across many sites and countries. Expect a bigger rollout.

How to judge a demand forecast before you trust it

1. Back-test it. Ask the vendor to forecast last season from older data and compare it with what you sold.
2. Check accuracy by item, not on average. A good total can hide big misses on your best sellers.
3. Look for promotions and seasonality. The tool should separate a one-off spike from real demand.
4. Check how it handles new products with no sales history.
5. Make sure planners can override it and see why the forecast changed.

If you're earlier on, my tips for managing a small business supply chain are a good place to start.

Do you make demand planning or forecasting software? Tool makers can ask to be considered for a featured place on this list.

My plain advice on choosing demand planning software

Match the tool to your size before you compare features. A Shopify brand with a few hundred SKUs doesn't need an enterprise suite, and a manufacturer with dozens of sites won't get far with a store app. Shortlist three, give each the same two years of sales history, and judge them on back-tested accuracy for your top products, not on the demo.

And keep the stock side tidy, because every forecast feeds a purchase order in the end. Clean item data, accurate lead times and sensible safety stock settings will do more for you than any algorithm.

Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.

Frequently asked questions

What is demand planning software?

It forecasts future customer demand by product, location and period, using sales history, seasonality and promotions, so teams can plan stock, production and purchasing.

What's the difference between demand planning and inventory management?

Inventory management tracks the stock you've got. Demand planning predicts what you'll need, which then drives how much you reorder and when.

Do small businesses need demand planning software?

Once you sell more than a few dozen products or carry stock with long lead times, yes. E-commerce brands can start with a Shopify-focused planner, because spreadsheets break first on seasonality.

What is demand sensing?

It uses very recent signals, such as daily sales or orders, to adjust short-term forecasts faster than a monthly planning cycle can. Several suites here offer it next to demand planning.

How accurate is demand planning software?

It depends on your data and products. Ask each vendor to back-test on your own history and report accuracy by item, because headline averages hide the misses that matter.