E‑commerce & retail
Unmetered Restock Alerts
Flat monthly price for small Shopify and BigCommerce stores to email waitlisted shoppers the moment items restock, with unlimited notifications and no per-message fees.
In plain English
- What category is this?
- Sellers and shoppers use this to list, sell, fulfill, or buy products online. Here the focus is e.
- The idea, briefly
Build one flat per-store price with unlimited email and web-push restock notifications, product titles localized to the buyer's language and market, alerts restricted to buyers who can actually be served, and a fully exportable waitlist and demand dashboard. SMS runs on the merchant's own provider instead of a resold per-message markup.
More ▾- What buyers expect
People comparing tools like Amp Back in Stock & Preorder +, Preorder, Back In Stock - STOQ, Notify Me! Back in Stock Alert expect the basics to work without surprise fees or missing pieces. The loud complaints are: Shopify's own out-of-the-box notify form captures emails but gives the merchant no waitlist dashboard, so the demand data is effectively lost. A merchant who used the default 'product-notify-me' form could not find the collected emails or what each buyer wanted; and small merchants explicitly try to avoid paying for a back-in-stock app at all, which is the price band a flat, low-cost, unlimited plan can serve.
More ▾
- Sources
- 13
- Checked
- 13
- Competitors
- 3
- Gaps
- 6
- Page checked
- 13 · 100%
- Snippet only
- 0 · 0%
- Documented
- 10 · 83%
- Interpreted
- 2 · 17%
- complaint5
- pricing4
- revenue2
- playbook2
Competitors
3Parsed from public pricing blurbs (entry paid tier when available). Max in set: $19/mo.
| Competitor | From | Free tier | Source |
|---|---|---|---|
| Amp Back in Stock & Preorder + | $19/mo | Yes | apps.shopify.com✓ |
| Preorder, Back In Stock - STOQ | $10/mo | Yes | apps.shopify.com✓ |
| Notify Me! Back in Stock Alert | $9.9/mo | Yes | apps.shopify.com✓ |
What customers complain about
6| Gap | Src |
|---|---|
Shopify's own out-of-the-box notify form captures emails but gives the merchant no waitlist dashboard, so the demand data is effectively lost. | |
Small merchants explicitly try to avoid paying for a back-in-stock app at all, which is the price band a flat, low-cost, unlimited plan can serve. | |
Multi-location and multi-market stores get dead-link alerts because a notification fires when any location is restocked, not when the customer's market can actually be served. | |
Product titles in restock notifications are not localized even when the rest of the message is, | |
The no-app / Shopify Flow path cannot actually deliver the alert: Flow's internal email action will not accept a dynamic recipient, | |
Even long-tenured merchants report the app silently stops sending alerts. A Shopify App Store reviewer with 10+ years on the app writes that every time they need it to work there… |
Documented Interpreted
How competitors find customers
4| Tactic | Src |
|---|---|
| Win the Shopify App Store by building an embedded, Polaris-compliant 'Built for Shopify' app from day one, then publicize the resulting badge and Top 25 selection. | stoqapp.com✓ |
| Answer high-intent 'how do I do back-in-stock' threads in the Shopify Community as the founder and pitch the app in-thread. | community.shopify.com✓ |
| Use personalized, same-day white-glove onboarding by named support staff to manufacture five-star review velocity. | apps.shopify.com✓ |
| Cross-sell the app into an existing Shopify merchant base after acquisition, as Amp did when it bought Back in Stock and placed it next to Lifetimely. | useamp.com✓ |
Your angle & pricing wedge
| Piece | Claim | Src |
|---|---|---|
| Angle | One flat per-store price with unlimited email and web-push restock notifications, product titles localized to the buyer's language and market, | apps.shopify.com✓ |
| Wedge | Mechanism: stop reselling messaging. Competitors meter notifications and resell SMS (STOQ prices SMS at $0.025 per message and $0.10-$0.25 per preorder overage… | community.shopify.com✓ |
How others got traction
3| Move | Why | Src |
|---|---|---|
| Amp acquired Back in Stock in March 2025 and folded it into a connected Shopify growth suite alongs… | Acquirer-attributed: the product page states 'Amp acquired Back in Stock in March 2025 to bring proven demand capture into a connected suit… | useamp.com✓ |
| STOQ went from launch in 2022 to 20,000+ stores and 1,800+ five-star reviews by building an embedde… | Founder-attributed: founder Sandesh Kulai writes that they 'used Shopify's design system from the start' and 'followed the Build for Shopif… | stoqapp.com✓ |
| Notify Me! expanded beyond Shopify onto BigCommerce, a platform the Shopify-centric incumbents stil… | Documented: the site markets BigCommerce as a first-class platform and the footer claims 'Join 35,000+ Shopify and BigCommerce merchants. | notify-me.io✓ |
Market heat
STOQ's homepage reports 30,000+ stores, 13M+ back-in-stock alerts sent, 300K+ preorders and $155M+ sales unlocked (company-reported, not audited).
Notify Me!'s site reports 35,000+ Shopify and BigCommerce merchants (company-reported, not audited).
Amp announced on 11 March 2025 that it raised an additional AUD$20M (total capital over AUD$48M) and acquired Back in Stock to add demand capture to its Shopify profit-analytics suite (company press release; currency is AUD, not USD).
More ▾The Amp/Back in Stock Shopify listing shows 954 reviews, a 4.9 rating and 'Hundreds of millions of alerts delivered across 25,000+ brands' (company-reported).
Revenue signals
4| Signal | Src |
|---|---|
STOQ: 30,000+ stores, 13M+ back-in-stock alerts sent, 300K+ preorders and $155M+ sales unlocked (self-reported on its homepage; not audited), | stoqapp.com✓ |
Notify Me!: 35,000+ Shopify and BigCommerce merchants and 3,400+ five-star reviews (company-reported, not audited). | notify-me.io✓ |
Amp: announced an additional AUD$20M raise and acquired Back in Stock in March 2025 (company press release, 11 March 2025); | useamp.com✓ |
Documented list pricing across the category: free tiers plus paid plans from $9.90/month to $99/month, | apps.shopify.com✓ |
Should you build this?
Small online stores lose sales when an item sells out, and the tools that email waitlisted shoppers are already paid for: Amp's Back in Stock charges $19-$99/month and was bought by Amp after an additional AUD$20M raise, STOQ reports 30,000+ stores and 13M+ alerts sent, and Notify Me! claims 35,000+ merchants. The opening is real but narrow. Merchants openly ask how to avoid a paid app, cannot find the waitlist emails Shopify collects for them, get alerts about items they cannot actually buy across markets, and cannot get product titles in the buyer's own language, while paid plans meter notifications and resell SMS on top. The wedge is one flat low price with unlimited email and push, correct market/language titles, and an exportable waitlist, sending messages through the merchant's own Shopify Email or Klaviyo so messaging cost is not marked up. The risk is that this is a crowded, well-funded shelf and STOQ already shipped market-based localized alerts in September 2026, so flat pricing alone will not hold. Validation step: before building, sign up 15 small stores now on a free or $9.90-$19.90 metered plan and get at least 5 of them to pre-pay $19/month for unlimited restock emails; if fewer will, the gap is too thin and you should pick a different angle.
More ▾
All sources
13| Source | Kind | Status | Accessed |
|---|---|---|---|
Amp Back in Stock & Preorder + - Shopify App Store listing apps.shopify.com | pricing | page checked | 2026-10-05 |
Preorder, Back In Stock - STOQ - Shopify App Store listing apps.shopify.com | pricing | page checked | 2026-10-05 |
Notify Me! Back in Stock Alert - Shopify App Store listing apps.shopify.com | pricing | page checked | 2026-10-05 |
Notify Me! pricing page notify-me.io | pricing | page checked | 2026-10-05 |
STOQ homepage stoqapp.com | revenue | page checked | 2026-10-05 |
| playbook | page checked | 2026-10-05 | |
Shopify Community: HELP.. need 'back in stock' notification email entries community.shopify.com | complaint | page checked | 2026-10-05 |
Shopify Community: Using Klaviyo for Back In Stock Notifications community.shopify.com | complaint | page checked | 2026-10-05 |
Shopify Community: Seeking Solution for Multilingual Back-in-Stock Notifications community.shopify.com | complaint | page checked | 2026-10-05 |
| complaint | page checked | 2026-10-05 | |
| playbook | page checked | 2026-10-05 | |
Amp Back in Stock reviews page (Shopify App Store) apps.shopify.com | complaint | page checked | 2026-10-05 |
| revenue | page checked | 2026-10-05 |