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Australcode Back In Stock for WooCommerce
Australcode Back In Stock for WooCommerce

Australcode Back In Stock for WooCommerce

0/5 (0 ratings) — active installs Updated Aug 16, 2026
back in stockback-in-stock notifierrestockrestock alertwaitlist
Download v1.8.1 Plugin Website
The "Notify me when available" form on an out-of-stock product page.

The "Notify me when available" form on an out-of-stock product page.

Australcode Back In Stock is a back in stock notifier and waitlist for WooCommerce that turns out-of-stock products into recovered sales. It is privacy-first (double opt-in and explicit consent built in), sends through Action Scheduler so big waiting lists never time out, and keeps every core feature free (Pro adds restock coupons, recovered-revenue tracking, SMS/WhatsApp alerts, Klaviyo & Mailchimp sync and webhooks). When a product is sold out, a “Notify me when available” form appears on the product page. Customers leave their email, and the moment you restock they get an automatic email with a link straight to it.

No more lost sales because a customer couldn’t be bothered to check back.

How it works

  1. A product runs out of stock.
  2. A subscribe form appears on the product page (simple, variable, grouped and subscription products).
  3. Customers enter their email — optionally confirming it first (double opt-in).
  4. You restock the product.
  5. Everyone on the waiting list gets an automatic email with a link to buy it.
  6. Customers can unsubscribe with one click from any email.

Free features

  • “Notify me when available” form on out-of-stock products — simple, variable, grouped and subscription products (a per-item form on grouped products).
  • Shortcode and Gutenberg block to place the form anywhere — works with any page builder; add mode="product" for popups and modals (Elementor, Divi).
  • Automatic restock email with the product’s photo, price and a direct link — a card built to win the sale back, not just notify.
  • Per-product subscriber list in the admin, with KPIs, a “Top demand” panel, status filters and email search.
  • Optional double opt-in (email confirmation before subscribing).
  • Optional consent checkbox (privacy-law friendly).
  • One-click unsubscribe from every email.
  • Reliable background sending via Action Scheduler — works for products with hundreds of subscribers without timing out.
  • Cache and CDN proof — the form fetches a fresh security token at submit time, so it keeps working behind full-page edge caches like Cloudflare and Kinsta.
  • Developer hooks — PHP actions and filters (acbis_after_subscribe, acbis_email_args) plus an acbis:subscribed JavaScript event, to wire signups into your CRM, analytics or email tool.
  • Customizable texts — the form’s intro line (or hide it), the button label, the consent wording and the email subject/heading text, all from Settings.
  • Appearance panel — pick an accent color, an outline or solid button and how round the corners are, so the form matches your theme without writing a line of CSS.

Pro features

  • Restock coupons — include a unique, single-use discount in each restock email. It is applied automatically at checkout (no copy-pasting), is restricted to the product and the customer’s email, and expires after the window you choose, so the urgency is real.
  • Recovered-revenue tracking — a dashboard that attributes paid orders back to your restock coupons, so you see exactly how many sales and how much revenue the waiting list brings back.
  • SMS & WhatsApp alerts — reach customers on their phone too, through your own Twilio account. Opt-in only: the customer adds their number and ticks a separate consent box, and the alert goes out by SMS and/or WhatsApp alongside the email.
  • Email-marketing sync — every subscriber is automatically added to your Klaviyo list or Mailchimp audience (bring your own API key), so you can build flows and segments around real back-in-stock demand.
  • Webhooks & demand alerts — fire a signed JSON webhook on every signup and restock (wire it to Zapier, Make, n8n or your own endpoint), and get a Slack or Discord ping the moment a product passes a demand threshold you set. Turn the waiting list into an inventory signal for your team.
  • Export the subscriber list to CSV (per product, with status and dates).

Get Pro →

Privacy

The plugin sends restock emails through your own site (wp_mail / your SMTP). The free plugin never sends your subscribers’ data to any third-party service: emails are stored in your own database, and the IP used for anti-abuse rate limiting is stored hashed, never in clear text. Two optional integrations are off by default: the Pro SMS/WhatsApp feature sends the phone number you collect — with the customer’s separate consent — to Twilio to deliver the message, and Freemius handles licensing and updates. Both are described under “External services” below.

External services

Freemius (account, licensing & secure checkout)

Australcode Back In Stock uses Freemius as its billing and licensing platform (Freemius is the Merchant of Record for Pro purchases). Connecting to Freemius is optional: on activation you can click “Skip” and the plugin stays fully functional without ever contacting Freemius.

  • If you opt in (free or Pro), the plugin sends your admin email, site URL and basic environment data (WordPress, PHP and plugin versions) to the Freemius API (host api.freemius.com, path /v1/) to create your account and check for updates.
  • If you activate a Pro license, the plugin sends your license key and site domain to Freemius to validate the license and enforce the per-plan site limit. The license is re-validated periodically.
  • Purchases and license management happen on Freemius-hosted pages (hosts freemius.com, users.freemius.com).
  • If you open the “Contact Us” screen, the support form is loaded from Freemius and whatever you type there (your name, email address and message) is sent to Freemius so they can route it to us. Nothing is sent unless you submit the form.

Apart from the support form, no data is sent to Freemius if you skip the opt-in and do not enter a license key.

  • Terms of Service: https://freemius.com/terms/
  • Privacy Policy: https://freemius.com/privacy/

Twilio (SMS & WhatsApp delivery — Pro, optional)

The Pro “SMS & WhatsApp alerts” feature is off by default and only works if you enable it and enter your own Twilio credentials. When a subscriber has given phone consent and a product is restocked, the plugin sends the subscriber’s phone number and the message text to the Twilio API (host api.twilio.com, path /2010-04-01/) so Twilio delivers the SMS/WhatsApp. Your Twilio Account SID and Auth Token are stored encrypted in your database and used only to authenticate these requests. No data is sent to Twilio unless you enable a channel and configure credentials.

  • Terms of Service: https://www.twilio.com/legal/tos
  • Privacy Policy: https://www.twilio.com/legal/privacy

Klaviyo & Mailchimp (email-marketing sync — Pro, optional)

The Pro “Email marketing sync” feature is off by default and only works if you enable a provider and enter your own API key. When a customer subscribes to a back-in-stock alert, the plugin sends their email address to the provider you enabled — Klaviyo (host a.klaviyo.com) or Mailchimp (host <dc>.api.mailchimp.com) — to add them to the list/audience you choose. Your API key is stored encrypted in your database and used only to authenticate these requests. No data is sent unless you enable a provider and configure it.

  • Klaviyo — Terms: https://www.klaviyo.com/legal/website-terms-of-use · Privacy: https://www.klaviyo.com/legal/privacy-policy
  • Mailchimp — Terms: https://mailchimp.com/legal/terms/ · Privacy: https://mailchimp.com/legal/privacy/

Webhooks & Slack/Discord demand alerts (Pro, optional)

The Pro “Webhooks & demand alerts” feature is off by default and only sends data to URLs you configure — it is not tied to any service we operate. When you set a webhook URL, the plugin POSTs a small JSON payload (event type, customer email, product ID and name, timestamp) to that URL on each signup and restock, signed with an HMAC-SHA256 X-Acbis-Signature header so your endpoint can verify it. When you set a Slack or Discord incoming-webhook URL and a demand threshold, it POSTs a short text message to that URL when a product reaches the threshold. The destinations are entirely yours (for example Zapier, Make, n8n, Slack or Discord); review the terms and privacy policy of whichever service you point them at. No data is sent unless you enter a URL.

Hooks for developers

Filters, to change behaviour or markup:

  • acbis_should_load_assets( $should_load ) — whether the form’s CSS and JS load on the current page. The plugin only loads them where the form can appear (product pages, or a page containing the block or the shortcode). Page builders that render the form inside a modal or popup keep their content outside post_content, so autodetection misses it — force it with add_filter( 'acbis_should_load_assets', '__return_true' ).
  • acbis_form_html( $html, $product_id, $is_variable ) — the form markup right before it is emitted, for wrappers, tracking attributes or extra copy. Keep the <form class="acbis-form__form"> and its inputs so the JS and the handler keep working.
  • acbis_email_args( $args, $type, $context ) — the arguments handed to wp_mail() (to, subject, message, headers) for both the confirmation and the restock email. $type is 'confirmation' or 'restock', and $context carries the product name and URLs, so you can swap the template or route the message through your own mailer.
  • acbis_restock_coupon( null, $subscription ) — return a coupon array here to attach a discount to the restock email. Returns null by default, which sends the email without one.

Actions, for side effects and extra markup:

  • acbis_after_form( $product, $html ) — fires right after the form is printed on the product page. Unlike the shortcode and the block, which return their HTML, this is the WooCommerce hook adapter and output is printed here, so an echo lands exactly where you expect: inside the product summary, after the form. It fires even when no form was shown (product in stock, or not resolvable) — '' === $html is that case.
  • acbis_form_extra_fields( $product_id ) — inside the form, after the email field. Add your own inputs here; they arrive in $_POST at the subscribe handler.
  • acbis_after_subscribe( $subscription, $outcome ) — after a signup attempt is resolved (new, reactivated, pending confirmation, or already waiting). A post-hoc notification that does not alter the flow: analytics micro-conversions, CRM sync, and similar. $outcome is an enum telling you which of those happened.
  • acbis_restock_notified( $subscription, $context ) — after the restock email has been sent to one subscriber. This is the extension point for extra channels; the core only sends email. $context carries the product name and URL.

In the browser:

  • acbis:subscribed — a JavaScript event dispatched on document after a successful signup, for analytics or tag managers. Full reference with examples in docs/hooks.md.