Byte8 Stock Radar

A free, MIT-licensed Magento 2 module that handles back-in-stock notifications the way they should have been done in 2020 — throttled, per-variant, headless-ready, with a merchandiser-grade demand heatmap baked into the admin.

Why this exists

Most "notify me when back in stock" modules — free or paid — ship the same UX from 2015:

1. Customer enters email, gets blasted as soon as inventory flips.
2. Configurables only subscribe to the parent SKU, not the specific size/colour the customer wanted.
3. No admin-side merchandiser tool — the email goes out and that's it.

Stock Radar fixes all three:

• Throttled batched notifications — random_int(0, throttle_window) per row spreads a single restock over the configured window (default 30 minutes), avoiding inventory crashes and spam-filter pattern-matching.
• Per-variant subscriptions — subscribe to "Red, M" specifically. The variant SKU map is server-emitted so the JS doesn't need to introspect Magento internals.
• Demand heatmap — sortable admin grid ranking products by pending subscriber count. Real reorder report, not vanity dashboard.

Where to start

If you've never installed the module, jump to the Quick start — Composer install, one config flag, and the cron does the rest.

If you're integrating into a headless / Hyvä storefront, the GraphQL page and the Hyvä and VelaFront pages are what you want.

If you're a merchandiser evaluating the admin tools, the Demand heatmap page is the one to read.

If you're a DACH merchant running PlentyONE, the paid Plenty bridge extends the heatmap with live ERP data and enriches the back-in-stock email with PO ETAs.

What this module is NOT

• Not an inventory-management system. Stock Radar reads cataloginventory_stock_item transitions and dispatches emails. Inventory still lives wherever Magento puts it (single-source, MSI, or your ERP).
• Not a marketing automation tool. We send transactional back-in-stock emails. We do not run drip campaigns, segment audiences, or A/B test subject lines. Use Klaviyo or Mailchimp for that.
• Not an ERP connector. The free module knows nothing about purchase orders, supplier ETAs, or warehouse counts. The paid Plenty bridge handles that for PlentyONE specifically; future bridges (Shopware, SAP, Microsoft Dynamics) follow the same pattern.

Module ecosystem

Package	Licence	Audience	Repository
byte8/module-stock-radar	MIT	All Magento stores	GitHub
byte8/module-stock-radar-hyva	MIT	Hyvä storefronts	bundled
byte8/module-stock-radar-plenty	Commercial	DACH stores running PlentyONE	private

Install the first two via Composer; the third needs a Byte8 licence key.