Shack

Shack is an AI-powered, fee-free auction app designed to revolutionize the second-hand marketplace. Designed in Switzerland and now available in Switzerland, Germany, Austria, and the United States, it connects local buyers and sellers for authentic, pre-owned items. The platform is built for anyone looking to declutter their space, hunt for unique collectibles, or flip items for profit within a secure, transparent, and community-focused ecosystem. Its core value proposition eliminates the friction of traditional online selling: there are no commissions on sales, no intrusive ads, and no generic stock photos. By leveraging AI to create complete listings instantly from a single photo and focusing on local discovery via an interactive map, Shack makes buying and selling effortless and fast. It champions sustainability by promoting reuse and offers a modern, crypto-enabled alternative to conventional marketplaces, all while maintaining a curated, authentic environment free from professional retailers.

AI-Powered Instant Listing

Launch an auction in seconds by simply taking a photo. Shack's AI automatically generates a compelling title, detailed description, and intelligent price suggestions, removing all the hassle and time typically required to create a listing.

100% Fee-Free Marketplace

Buying and selling on Shack is completely free of charge. The platform does not take any commissions or transaction fees from users, ensuring sellers keep 100% of their sale price and buyers get the best possible value.

Local Interactive Discovery Map

Find exciting auctions happening right in your neighborhood. The interactive map shows nearby listings, enabling local pickups, fostering community connections, and providing a transparent, real-time view of marketplace activity.

Secure & Curated Ecosystem

Shack prioritizes safety and authenticity. Listings are curated to ensure they are for genuine pre-owned items, blocking professional retailers and dropshippers. Features like seller verification and secure, flexible payment options create a trusted environment.

Decluttering for Cash

Quickly and easily turn unwanted items in your home into cash. Use the AI to list items in seconds and sell them locally with no fees, making decluttering a profitable and efficient process.

Hunting for Unique Collectibles

Discover rare vinyl, vintage fashion, or unique furniture treasures in your local area. The interactive map and auction format make the hunt for special second-hand items exciting and community-driven.

Flipping Items for Profit

Source undervalued items from local sellers and resell them for a profit on the same platform. Shack's fee-free structure maximizes your margins, and the AI listing tool lets you scale your flipping business efficiently.

Sustainable Community Commerce

Participate in a circular economy by buying and selling pre-owned goods locally. Reduce waste, promote reuse, and connect with neighbors, all within a platform designed for authentic, community-oriented transactions.

Are there any fees to use Shack?

No. Buying and selling on Shack is completely free of charge. The platform does not charge any transaction fees or commissions to buyers or sellers.

What payment methods are supported?

Buyers can pay sellers in CHF via TWINT, in EUR, via PayPal, or with cryptocurrency if the seller offers it. The payment is a direct peer-to-peer transaction between users.

What devices are supported?

Shack is currently available only as a native app for iOS devices (iPhone and iPad) running iOS 17.0 or later. An Android version is not available at this time.

What can I sell on Shack?

You can sell authentic, pre-owned personal items. The app contains a list of permitted categories. The platform is curated to exclude new items from professional retailers or dropshippers to maintain a genuine C2C marketplace.