Most low-stock tools email you about your own warehouse: a Shopify Flow workflow or an inventory alert app sends a list of SKUs below a threshold. If you're a wholesale brand and want retailers emailed when your products run low on their shelves, you need a wholesale tool. Ordrly does this with forecast-based low-stock alerts.
That difference matters more than any feature list. "Reorder email automation" can mean three separate jobs: watching your own stock, reminding retailers when they are due, and catching accounts that have gone quiet. This guide covers what to automate, which triggers to use, the tools that handle each one, and where a person should still step in.
Two kinds of "running low" emails
Before you pick a tool, decide who the email is for.
Alerts about your stock | Alerts about your retailers' stock | |
|---|---|---|
Who gets the email | You or your ops team | The retailer's buyer (with a copy for you) |
What it watches | On-hand inventory in your warehouse or store | How fast each account works through what it bought from you |
What it prevents | Selling out before your own restock lands | An empty shelf, and a reorder that never gets placed |
Typical tools | Shopify Flow, inventory alert apps | Wholesale ordering platforms and B2B reorder tools |
Most brands need both. There is no point nudging a store to reorder a SKU you can't ship, and there is no point holding perfect stock if retailers forget to reorder it.
Want retailers to hear when your products are running low? Create a free brand account. Core is $0/month, and retailers join free.
What to automate (and what to keep personal)
Automation works best on jobs that are repetitive, triggered by data, and easy to get wrong when you are busy. Good candidates:
Spotting the moment. Watching stock levels, order dates and reorder gaps across every account is exactly the kind of work people forget to do.
Listing the SKUs. A reminder that names the products that are actually running low beats a generic "time to restock."
The reorder link. Every automated email should end in a link that opens an order at your current wholesale price and real stock.
Stopping. The sequence should end as soon as the account orders, so nobody gets a reminder for an order they already placed.
Keep these personal:
Win-backs for lapsed accounts. A store that has gone quiet usually has a reason. A real question from a person you know gets a real answer.
Anything involving price, terms or credit. Those are relationship conversations, not merge fields.
Top accounts. Let automation flag them, then call or write yourself.
If you need the wording for those personal notes, our wholesale reorder email templates cover what to send and when. This post is about the machinery that decides when they go out.
The three triggers that matter
Trigger 1: Low stock
The simplest trigger is a quantity threshold: email me when a variant drops below 5. Shopify's own Flow documentation shows the catch. The "Product variant inventory quantity changed" trigger fires on any inventory change, including manual edits and app updates. If you only check the current amount, the reorder email goes out every time another unit sells until you restock. Shopify's fix is to check the prior quantity too, so the alert fires once, when the item first crosses the line.
The second problem is the number itself. StockAnvil, a Shopify alert app, puts it plainly on its site: twelve units can be three days of cover on one product and four months on another. That is why many alert tools now use days of cover, calculated from how fast each item sells, instead of one number for the whole catalog.
The same idea applies to retailer-facing alerts. A good low-stock trigger estimates when a product will run out at that store, not just whether a counter hit zero.
Trigger 2: The reorder window
Every account has a rhythm. Some reorder every three weeks, others once a season. A reorder-window trigger fires a little before that account is usually due, based on the gap between its past orders.
Consumer replenishment flows work the same way. Retainful's replenishment reminder, built for direct-to-consumer stores, starts when an order is placed, waits most of a typical supply cycle, sends the reminder, then checks whether the customer has already reordered before any follow-up. That logic carries over to wholesale, with one change: use each account's own interval, not one delay for everyone.
For accounts with only one order, start with your typical interval and adjust once a second order comes in.
Trigger 3: The lapsed account
When an account goes well past its usual gap, a cheerful automated reminder is the wrong tool. Use automation to flag the account and alert you, then follow up yourself. Our guide to missed wholesale reorders covers how to set those bands (overdue at about 1.5 times the interval, lapsed at about 2 times) and what a three-touch win-back looks like.
Rules that keep automated reorder emails useful
One alert per item, per crossing. Fire when a SKU crosses into "low," not on every sale after that.
Group SKUs into one email. Three products running low should mean one message, not three.
Check your own stock first. Don't invite a reorder for something you can't ship this week.
Stop on order. Exit the sequence the moment the account places an order.
Cap the frequency. Set a minimum gap between automated messages to the same buyer.
Make the next step one click. Link to an order at live price and stock, not a PDF line sheet.
Review the flags weekly. Automation decides when to look. You decide what to say to the accounts that matter most.
Tool options for reorder email automation
Here is how the main types of tools line up. Each description is based on the vendor's own public pages as of November 2026.
Tool type | Example | What it automates | Best for |
|---|---|---|---|
Built-in workflow automation | Shopify Flow | Low-stock emails to your team; templates also include emailing a vendor to start a reorder when inventory is low | Watching your own stock on Shopify at no extra cost |
Inventory alert apps | StockAnvil | Days-of-cover alerts, one open alert per item, a daily or weekly digest, and a restock list with suggested quantities | Brands whose catalog has outgrown a single threshold |
Consumer replenishment flows | Retainful | Timed "running low?" emails to shoppers after a purchase | DTC consumables, not wholesale accounts |
Wholesale cadence tools | Reorder Nudge | Learns each Shopify wholesale shop's reorder rhythm, flags overdue and lapsed accounts, drafts an email with a cart link that rebuilds the last order for you to review and send | Shopify B2B brands that want a reorder-window and lapsed-account list |
B2B commerce platforms | Turis (Pulse) | Automated emails based on reorder cadence and account inactivity | Larger B2B teams already running ERP-connected ordering |
Wholesale ordering network | Ordrly | Forecast-based low-stock alerts emailed to connected retailers, with a reorder link; you see the same list with recommended quantities | Brands that want retailers prompted about their own shelf stock |
Most of these watch either your inventory or your order calendar. Few email the retailer about their own stock of your products, the trigger that most directly prevents an empty shelf.
Ready to automate the retailer side? Start free as a brand, then invite the accounts that already order from you. Retailers sign up free.
How Ordrly handles reorder reminders
Ordrly is a wholesale ordering network for brands and retailers. Here is what its missed reorder page and live feature list describe today:
Connected retailers. You invite the stores that already buy from you. They join free and order from your live wholesale catalog, at your current price and stock.
Forecast-based low-stock alerts. A forecast built from order history names the SKUs heading toward a stockout. The retailer gets an email listing those SKUs, the earliest projected stockout, and a link to reorder.
Your view of the same list. You see those SKUs with a recommended quantity, so you know which accounts are about to need you.
Brand-created orders. If a buyer replies "send what I had last time," you can start the order from your side. Saved order templates help with recurring accounts.
Demand forecasting and reorder recommendations for planning your own inventory, so the reorder you prompt is one you can fill.
Order chat, payments and net terms in the same place. Net terms run through Ordrly's embedded trade finance, which covers terms, underwriting, AR and collections, subject to eligibility.
What it doesn't do yet: Ordrly doesn't create a PO from what sold on a retailer's register. Observed sales from a connected point-of-sale source are on the roadmap. Today the reminder comes from a low-stock forecast, and the retailer (or you) places the order. Lapsed-account outreach is still your call, which is where a short personal note does its best work.
Core is $0/month with a 1.5% Network Fee when an order runs through Ordrly. To size what quiet accounts cost you, the missed reorder calculator works it out from three numbers.
A 30-minute setup plan
Turn on your own stock alerts. Use a Flow workflow that checks prior quantity, or an alert app with days-of-cover thresholds.
Pull your account list. For each account, note the last order date and the usual gap between orders.
Connect your active retailers to a tool that alerts them when your products run low, so the low-stock trigger reaches the person who places the order.
Set a weekly flag for accounts past about 1.5 times their usual gap. Those get a personal email or call, not an automated one.
Check once a month. Are reminders turning into orders? Are any accounts getting too many emails? Adjust timing and caps.
FAQ
What tool emails me which products are running low and need reordering?
For your own inventory, Shopify Flow's low-stock email template or an inventory alert app such as StockAnvil will email you a list of low SKUs. If you are a wholesale brand and want your retailers emailed about your products running low on their shelves, Ordrly sends connected retailers forecast-based low-stock alerts with a reorder link.
What is reorder email automation?
It is a set of rules that sends reorder reminders automatically when something happens: stock crosses a threshold, an account reaches its usual reorder window, or an account goes quiet. A good setup names the specific products, links straight to an order, and stops once the order is placed.
Should wholesale reorder reminders be fully automated?
Automate the timing, the product list and the reorder link. Keep win-backs, pricing conversations and your biggest accounts personal. Automation is good at noticing; people are better at fixing what made a store go quiet.
How do I stop low-stock alerts from repeating?
Fire the alert only when an item crosses the threshold. In Shopify Flow, that means checking both the current and the prior inventory quantity. Many alert apps keep one open alert per item until stock recovers.
Can Ordrly create a purchase order from a retailer's register sales?
Not today. Ordrly's alerts come from a forecast built from order history, and the retailer or the brand places the order. Using observed register sales is on the roadmap.
Is Ordrly free for retailers?
Yes. Retailers pay nothing to use Ordrly. Brands start on Core at $0/month and pay a Network Fee when an order runs through Ordrly.
Let the low-stock alert start the next order
The reorder you miss is usually the one nobody noticed in time. Automate the noticing: watch your stock, alert retailers before they run out, and flag the accounts that go quiet so you can call them yourself.
Create your free brand account and invite the retailers who already order from you. Retailers can join Ordrly free and reorder from the alert.