Shopify Sidekick Inventory Management (2026)

Shopify Sidekick Inventory Management: What It Can (and Can't) Do in 2026

Last updated: July 2026

Quick answer: No, Shopify Sidekick does not replace Stocky for inventory forecasting. Sidekick answers conversational inventory questions, surfaces low-stock alerts, and — since the Spring ’26 Edition — can draft a pre-filled purchase order when you ask. But it cannot generate 12-month demand forecasts or apply supplier lead-time and MOQ logic to the quantities it suggests — core Stocky functions. For merchants migrating before the August 31, 2026 Stocky sunset, Sidekick handles reactive queries while a dedicated forecasting tool like Forthcast handles purchase order management and forward-looking demand planning.

TL;DR: Shopify Sidekick is an AI assistant built into your Shopify admin — it answers inventory questions, surfaces low-stock alerts via Sidekick Pulse, and can trigger lightweight Shopify Flow automations. What it still cannot do natively is produce 12-month demand forecasts, apply lead-time and MOQ logic to reorder quantities, generate structured purchase orders automatically, or tell you the revenue at risk from a coming stockout. Since the Spring ’26 Edition, Sidekick can draft a pre-filled purchase order on request (see the 2026 update below), and since June 2026 the Forthcast extension answers full planning questions — forecast horizon, reorder sizing, revenue at risk — inside the same chat. If you are migrating away from Stocky before the August 31, 2026 sunset, Sidekick handles the conversational side; Forthcast handles the planning side.

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What Shopify Sidekick Actually Does for Inventory

Shopify Sidekick launched publicly in 2024 and has been rolled out broadly across Shopify stores, handling a large and growing volume of merchant conversations. It is an AI assistant embedded directly in the Shopify admin — you ask it questions in plain English and it answers using your live store data.

"Supply chain has definitely been kind of an Achilles heel of ours. I feel like every time we've started to gain real momentum, we've encountered challenges around supply chain."

For inventory, Sidekick is genuinely useful for reactive, point-in-time questions:

• Stock level queries — "Which products have fewer than 20 units left?" returns an instant, accurate answer from your live inventory.
• Sell-through analysis — "What is my sell-through rate on the winter jacket collection?" pulls current data without any report building.
• Conversational filtering — "Show me all SKUs that haven't sold in 60 days" works as a fast filter that would otherwise require a custom report or export.
• Flow automation drafting — You can prompt Sidekick to build a Shopify Flow automation in plain language: "When inventory drops below 10, send me a Slack notification." Sidekick generates the workflow for you to review and activate.

These capabilities are real and save time. For small merchants with simple catalogs, Sidekick replaces a significant amount of ad hoc spreadsheet work.

Sidekick Pulse: The Proactive Inventory Feature

Shopify's Winter '26 Edition (December 2025) added Sidekick Pulse — the most significant inventory-adjacent upgrade Sidekick has received. Rather than waiting for you to ask a question, Sidekick Pulse proactively surfaces inventory imbalances and growth opportunities when you open the admin.

"So we've tried a couple apps, for inventory management and for production management. One of them was called Katana, which was actually pretty great until we had way too many orders for it to support."

"the foundation and why these problems continue to exist—we haven't found a viable solution for"

For Shopify Plus merchants, Pulse can also suggest stock transfers between locations based on regional demand signals. This is a genuine step toward proactive inventory management — but it is still reactive in a fundamental sense: it surfaces problems that already exist in your current stock levels. It does not publish a forward-looking demand curve — there is no three- or twelve-month forecast you can plan purchasing against.

Think of Sidekick Pulse as a smart dashboard that tells you what is happening right now. Forthcast is the engine that tells you what will happen next month — and what to order, when, and how much.

What Changed in 2026: Sidekick’s Editions Updates and the Forthcast Extension

Shopify’s Spring ’26 Edition inventory update moved Sidekick past purely reactive answers. Sidekick now recommends what to reorder based on your sales history and demand (“what should I reorder this week?”), and it can create a purchase order for you, pre-filled with the products, quantities, and cost prices — then adjust quantities, discounts, tariffs, and currencies in the same conversation. The Summer ’26 Edition added multi-step reasoning across store data, support for 20 languages, and the ability for Sidekick to answer questions about — and act inside — connected partner apps.

Forthcast now runs inside Sidekick. Since June 2026, Forthcast ships a Sidekick app extension: ask Sidekick a planning question like “what should I reorder?”, and Sidekick calls Forthcast to answer with specific reorder quantities, the revenue at risk, and awareness of stock already on order.

Illustrative example of the extension’s output:

You: What should I reorder?

Sidekick (via Forthcast): Sorted by revenue at risk —

• Already oversold, PO on the way → “Trail Mix Pouch” is 40 units oversold, but an open PO of ~5,600 units is in transit (60-day lead time) — no additional reorder needed.
• Oversold, no PO → “Starter Bundle” is 260 units oversold with no open PO — order ~340 units now.
• Out of stock → “Focus Capsules” is at zero — suggested reorder ~90 units.

The key detail: the recommendation accounts for stock already on order — it tells you when not to reorder because a PO already covers demand, which a naive low-stock alert cannot do.

What Sidekick Still Cannot Do: The Structural Gaps

These are the gaps that remain in native Sidekick even after the 2026 Editions updates. They are less about missing buttons than about what the two systems are built to do: Sidekick is a conversational assistant over your store data; a dedicated forecasting tool is a planning engine with its own models, constraints, and automation.

No Demand Forecasting Horizon

Sidekick can tell you your current sell-through rate, and since the Spring ’26 Edition its reorder suggestions are informed by a short-horizon demand read. What it still cannot tell you is what you will sell in July if current trends continue, if you run a promotion, or if last year's seasonal pattern repeats. Forthcast runs machine learning across your full sales history to produce 12-month SKU-level demand forecasts that account for seasonality, trend, and promotional spikes. Sidekick has no equivalent output.

No Lead Time or MOQ Logic

When Sidekick flags a low-stock SKU, it does not know your supplier's lead time is 45 days or that the minimum order quantity is 500 units. Forthcast builds lead times, MOQs, and days-of-cover targets into every reorder recommendation, producing a specific order quantity tied to a specific order date — not a generic "you might run out" alert.

Purchase Orders: Drafts on Request, Not an Automated Loop

Since the Spring ’26 Edition, Sidekick can create a purchase order on request — pre-filled with products, quantities, and cost prices — and adjust it in conversation. What it still does not do is run the replenishment loop automatically: purchase orders are drafted when you ask — not generated on a schedule from a standing forecast — and its suggested quantities do not apply your supplier lead times or MOQs. Forthcast generates and manages POs natively, including in-transit stock visibility so you never double-order because you forgot a shipment was already on its way. This was one of Stocky's core functions — and it is one of the primary gaps Sidekick cannot fill for migrating merchants.

No Revenue-at-Risk Calculation

Forthcast calculates how much revenue a specific stockout will cost you if you do not reorder by a specific date — a "revenue at risk" figure that turns a vague warning into a business case for action. Sidekick surfaces no equivalent calculation. You know a product is low, but not what it will cost you.

Thin Data Limitations

For stores with less than 12 months of sales history or low per-SKU velocity, Sidekick's inventory suggestions can be unreliable. Forthcast handles thinner data through comparable-SKU modeling and prior adjustment, giving new product lines a reasonable baseline rather than no forecast at all.

Multi-Warehouse Complexity

Sidekick's multi-location transfer suggestions are Shopify Plus-only and handle simple cases. Complex inventory allocation across multiple warehouses, 3PL relationships, or split shipments is beyond what Sidekick can reason about today.

Sidekick vs Forthcast: Capability Comparison

Capability	Shopify Sidekick	Forthcast
Current stock level answers	✅ Yes	✅ Yes
Sell-through rate queries	✅ Yes	✅ Yes
Proactive low-stock alerts (Pulse)	✅ Yes (Winter '26)	✅ Yes
Shopify Flow automation drafting	✅ Yes	❌ No
12-month demand forecasting	❌ No	✅ Yes
Seasonality and trend modeling	❌ No	✅ Yes (ML-powered)
Lead time and MOQ-aware reorder quantities	❌ No	✅ Yes
Automated purchase order generation	❌ No	✅ Yes
In-transit inventory tracking	❌ No	✅ Yes
Revenue-at-risk calculation	❌ No	✅ Yes
Price	Free (built into Shopify)	$19.99/month flat rate

The Right Framing: Complementary, Not Competitive

The most useful way to think about Sidekick and Forthcast is not as alternatives but as tools that operate in different time horizons:

• Sidekick tells you what is happening. It is your real-time inventory assistant — fast, conversational, and always up to date with your current stock.
• Forthcast tells you what is going to happen — and what to do about it. It runs the forecasting engine, calculates the right reorder quantities, generates the purchase orders, and tracks the revenue you are putting at risk if you delay.

Many merchants will find that Sidekick handles their day-to-day inventory questions satisfactorily. The question is whether day-to-day answers are enough — or whether you need a plan for next quarter.

For deeper reading on the specific inventory mistakes that Sidekick's reactive approach leaves merchants exposed to, see our spoke piece: 5 Inventory Mistakes Shopify Sidekick Can't Catch (And How to Avoid Them).

For a broader comparison of Sidekick against the full landscape of dedicated inventory apps, see: Shopify Sidekick vs Dedicated Inventory Apps: When Free AI Isn't Enough.

What to Do Before the Stocky Sunset

Shopify is retiring Stocky on August 31, 2026. The app was delisted from the App Store on February 2, 2026, and existing installs will stop working at the end of August. If you are a current Stocky user evaluating what to do next, you have roughly four months to make a decision.

Shopify has pointed partly to Sidekick as part of the replacement picture — and Sidekick does handle the conversational inventory questions that Stocky's dashboard used to answer with reports. But Stocky's core function was purchase order management and reorder point calculation. Sidekick does not replace that.

For a full migration guide including a step-by-step walkthrough of moving from Stocky to a dedicated forecasting tool, see our step-by-step Stocky-to-Forthcast migration guide.

Related Reading

• SKU Demand Forecasting: The Complete Guide for Shopify Brands (2026)
• Best Inventory Management Software for Shopify & Small Business (2026)
• Inventory Planner Pricing: Real Vendor Pricing Compared (2026)
• Blue Yonder Pricing 2026: Costs & Alternatives
• Shopify & 3PL SKU Mismatch: Fix Inventory Sync