Arctic Grey
Built by Arctic Grey · Shopify Platinum Partner
Run auctions, not a collections desk.
When the auction closes, Auction+ captures the winner's pre-authorized card automatically. You stop chasing buyers and start banking sales.
Niloticus · mint condition
1968 · box and papers
Size 10 · deadstock
Discontinued · 2022
You win the bid. Then you spend a week chasing the buyer.
Every other Shopify auction app has the same broken ending. The auction ends, and you become a collections agent.
The ghost winner.
Bidder wins. Bidder disappears. You manually send a draft order and hope the payment lands. Usually it does not.
The relist loop.
Card declines. Buyer is unreachable. You relist the same product, run the same auction, lose the same week. Over and over.
The phantom bidder.
Competitors and bots place bids they never intend to honor, just to disrupt your auction. No card on file means no accountability.
The only Shopify auction app that closes the loop.
| Auction+ | Treo Auction Plus | Webkul Product Auction | Auction Today | Bidly | |
|---|---|---|---|---|---|
| Pre-authorizes the bidder's card before the auction ends | |||||
| Auto-captures the winning bid the moment the auction closes | |||||
| Auto-releases every losing bidder's hold instantly | |||||
| Power Auction — auto-flips any 1-unit SKU into a live auction | |||||
| Built on Shopify Payment Sessions API (native, no Stripe sidecar) | |||||
| Free to install. No monthly fee. Pay only when an auction wins | |||||
| Theme app extension — zero code, clean uninstall |
Comparison based on public Shopify App Store listings and Arctic Grey's competitive audit of May 2026. Half-dot = partial or paid-tier only. Competitor information based on listings; product capabilities may have changed since publication.
Pre-authorize. Hold. Capture. Release. Automatically.
Built natively on Shopify Payments. No Stripe sidecar. No redirect. No draft orders. The bidder's card is on the hook from the moment they place the bid.
Bid placed
Customer places a bid. Their card is vaulted via Shopify's customerPaymentMethod API.
Hold authorized
The bid amount is placed on hold via Shopify's Payment Sessions API. Funds are reserved.
Higher bid arrives
Previous hold releases instantly. New hold authorizes on the new bidder's card. Repeat.
Auction ends
Winner's hold captures automatically. All losing holds release. Nobody to chase. Nobody waits.
Order created
A real Shopify order lands in your admin. Same payout schedule as every other sale on your store.
Flip one toggle. Every last unit becomes a price-discovery engine.
You don't have to be an auction store to use Auction+. Every Shopify merchant has last-unit items. Power Auction turns them into real-time pricing data, automatically.
Every line item every other auction app charges for. Free until an auction wins.
Auction+ ships the full payment-engineering stack — pre-authorization, hold management, auto-capture, auto-release, theme injection, PCI-compliant card vaulting, and the Power Auction trigger — built natively on Shopify Payments by a Shopify Platinum agency. Here's what each piece would cost you anywhere else.
Replacement-cost figures reflect typical build estimates for equivalent Shopify Payments integration work at agency rates. Your engineering cost will vary by team and scope. Arctic Grey ships Auction+ as a single install for $0 up front, with commission only on closed auction sales.
Every Shopify auction app I tried made me a collections agent. The bidder wins, the bidder ghosts, and I'm sending draft orders and chasing buyers like it's 2014. We built Auction+ so the auction is the close — the bidder's card is authorized the moment they bid, captured the moment the auction ends, and a real Shopify order shows up in the admin. No invoicing. No chasing. No no-pays.
If Auction+ doesn't make you money, you don't pay us a cent.
Free install, free setup, free to keep running.
Nothing to subscribe to. Nothing to maintain. Power Auction is a single toggle.
Auctions always start at your price.
The only direction a bid can move is up. You will never sell a product below your listed retail.
The bidder's card is on the hook, not yours.
If a hold fails, you keep the inventory. No charge, no refund, no friction.
Uninstall anytime. Clean theme.
Auction+ runs as a theme app extension. Remove the app, the buttons vanish, no leftover code on your store.
Free until you profit. Then the more you sell, the less we charge.
No monthly fee. No setup fee. No card on file. You pay a commission only when an auction sale closes, and the rate drops as your volume grows.
| Monthly auction sales | Our rate | You keep | Max we ever take |
|---|---|---|---|
| Under $1,000 | 3.00% | 97.00% | $30 |
| $1k to $10k | 2.00% | 98.00% | $200 |
| $10k to $100k | 1.00% | 99.00% | $1,000 |
| $100k to $1M | 0.75% | 99.25% | $7,500 |
| $1M to $10M | 0.50% | 99.50% | $50,000 |
| $10M and above | 0.39% | 99.61% | Uncapped |
USD · billed against auction sales only · normal Shopify orders are never charged
Everything merchants ask before they install.
Stop chasing winners.
Get paid automatically.
Install Auction+. Flip Power Auction. The winning bid charges itself. You only pay us when an auction wins money you would not have made otherwise.
Install free from the Shopify App Store