DemandLoop helps merchants recover sales lost when products sell out. Add a lightweight waitlist widget to collect shoppers and automatically notify them when products or variants are restocked. Each alert includes clear revenue attribution, so merchants can see which notifications drive orders and which items have the highest demand. Easy setup with Online Store 2.0. Notify via email or web push. Offer preorders on popular items. Free plan available. Costs stay capped.

• Automatic back in stock alerts for products and variants
• Smart waitlists that capture demand on exact items shoppers want
• Clear revenue attribution showing which alerts drive orders
• Analytics dashboard showing which products have highest demand
• Preorder support to capture revenue before items arrive

Serial Trail gives every physical unit a durable serial record. Create or import serial numbers, assign them at fulfillment, scan lifecycle changes, and reconcile the registry against orders and stock. When a product issue appears, define the affected population by serial range, pool, serial list, or product and sold-date window, then preview the exact affected units before you activate. Warranty claims are validated against a real unit, with duplicate-claim and out-of-warranty flags surfaced.

• Create, import, or auto-generate serial numbers and assign them at fulfillment.
• Recall by serial range, pool, serial list, or product and sold-date window.
• Validate warranty claims against a real serial, with duplicate and fraud flags.
• Public serial lookup and QR unit passports, with no buyer or order data exposed.
• Reconcile serialized units against orders and stock; export everything as CSV.