StockLock
Stop scalpers

Keep your drops for real customers

Scalpers buy in bulk, come back for more and race through express checkout. StockLock puts limits where they can't skip them: in Shopify's checkout itself.

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Tactic by tactic

How scalpers buy, and what stops them

What scalpers do
What StockLock does
Fill one cart with the whole run.
Fifty of the same release in a single order.
Per-order limits. A maximum per product, and a total across a collection, so one order can't take more than its share.
Come back for more.
Order two, then two more, then two more.
Per-customer limits. StockLock counts what each signed-in customer has bought across orders, and checkout refuses anything over their limit.
Skip the product page.
Bots go straight to Shop Pay, Apple Pay or a cart link.
Limits run in checkout. The rule runs on Shopify's servers for every checkout, express checkouts included, so there's no page to skip.
Use fresh accounts.
New accounts made just for the drop.
Invite-only drops. Invite customers by real history (spend, orders, what they've bought) or tags. New accounts aren't invited, and checkout tells them so in your words.
Slip through an edge case.
An order that gets past a limit somehow.
Breach holds. Orders that break a limit are tagged and held before they ship, so you can cancel or refund them.
Recommended setup

For a hyped release

  • Max per order on each limited product, for example 2
  • Max per customer across orders, so repeat orders count
  • A collection limit on the release, so variants can't be stacked
  • Members-only or invite-only, so buyers must sign in, which makes per-customer limits count
  • Open the drop on a schedule to everyone once your invitees have had their turn

Being straight with you

StockLock limits what each order and each signed-in customer can buy. It isn't a bot detector and doesn't add CAPTCHAs. Shopify already protects checkout from many bots, and the two work together.

Per-customer limits need customers to be signed in. Guests can't be counted across orders, which is why members-only and invite-only drops pair so well with them.

Someone with several genuine accounts, each within its limit, isn't over any limit. Invite-only drops based on real purchase history are the best answer to that.

Fast to set up

Limits are fields on your products. A drop is one form: products, who's eligible, how many to invite.

Clear for real fans

Shoppers see the limit on the product page and in the cart before they reach checkout, in your own wording.

Holds when it matters

The busiest moments are when limits must hold. Checkout enforcement doesn't depend on our servers being reachable.

Your next drop, protected

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