Smart Stock Alerts or InStockNotify?
Both apps do the same job on BigCommerce: a sign-up form on sold-out products and an email when stock is back. Here is where they differ, taken from each app's own listing and website.
Side by side
Prices and features as published by each app on September 26, 2026. If something changes on their side, tell us and we will correct it.
| What you compare | Smart Stock Alerts | InStockNotify |
|---|---|---|
| Standard plan | $13.99 a month | $18 a month |
| Premium plan | $19.99 a month | $25 a month |
| Extra storefronts (Multi-Storefront) | 3 included on Standard, unlimited on Premium | $5 a month per additional storefront |
| Free trial | 7 days, no card, Premium features | 15 days |
| Stock checks | Every 6 hours on Standard, hourly on Premium, at the hours you choose in your timezone | Every 6 hours on Standard, hourly on Premium, manual check available |
| Emails per month | 1,000 on Standard, unlimited on Premium | Not stated |
| Email tracking | Sent, opened, clicked, and the order that followed | Sent and opened |
| Order attribution and revenue | Yes, per email, per product, per customer | Not mentioned |
| Send from your own domain | Yes, DNS authentication built in (SPF, DKIM, DMARC) | Not mentioned |
| Widget on product variants | Yes | Yes |
| Email templates | Editable, with product variables, one set per storefront | Editable colour, content and fonts |
| Most-wanted products | Yes, ranked, with stock state | Yes, top products |
| Customer loyalty view | Yes, repeat buyers and revenue per customer | Not mentioned |
| CSV export | Yes | Yes |
| Klaviyo integration | No | On Premium |
| Marketplace rating | New listing, few reviews yet | 4.5 stars, 47 reviews |
| Sources: the InStockNotify marketplace listing and instocknotify.com, and this site. "Not mentioned" means the feature does not appear in their published material; it may exist. | ||
Pick InStockNotify if
- You push your lists into Klaviyo and run the emails from there.
- You want the longer 15-day trial and a listing with more reviews behind it.
Pick Smart Stock Alerts if
- You want to know which restock emails turned into orders, not just which were opened.
- You run several storefronts: three are included, none billed separately.
- You want emails to leave from your own domain, with your name on the From line.
- You want to pay less for the same check frequency.
Try it on one storefront for a week.
Install from the BigCommerce marketplace, keep your current app running, and compare the numbers yourself.