Every day, people buy and sell second-hand items through social marketplaces. But there's no protection. Sellers get ghosted. Buyers receive counterfeits. Cash exchanges in parking lots leave both parties exposed.
Contractly makes second-hand meetups safer by turning a simple chat deal into a signed smart contract with escrow.
List your item or find one on any marketplace. Start a conversation inside Contractly.
Smart Chat AI drafts a smart contract from your agreement. Review terms, price, conditions. Then both sides sign.
USDC escrow automatically locks funds in the contract. No third party holds the money, it lives on-chain.
Meet at a verified exchange location. Inspect the item. Both parties confirm the handoff with on-chain signatures.
After both sides sign off, escrow releases automatically. If there's a dispute, decentralized arbitration steps in.
Supports Smart Wallets for the smoothest setup. Passkey-based or social login, no seed phrase. Or Advanced EOA for experienced crypto users. Choose your level.
Hides blockchain complexity behind plain language and role-based actions. You don't need to understand gas fees to use Contractly.
Keeps off-chain systems (meetups, exchange agreements) verifiable against on-chain anchors. Every action can be independently verified.
Use Contractly in parallel with Facebook Marketplace, OfferUp, Craigslist, Nextdoor. Contractly is the trust layer. Your marketplace is the discovery layer.
A clean, familiar marketplace experience, backed by the power of blockchain. No jargon. No confusion.
Every feature is designed around one principle: making second-hand transactions as trustworthy as buying from a store, without the middleman.
Smart Contracts created and deployed from agreed terms in chat. Automatic escrow. No third parties hold the funds.
Every action is documented on-chain. Immutable, transparent, verifiable by both parties at any time.
In case of conflict, funds remain in the smart contract until decentralized arbitration steps in. No bias.
USDC escrow (recommended), cash-at-meetup, or a hybrid. Choose what works for your deal.
Money moves only after the agreed checks and signatures. Buyer and seller are both covered.
Built around securing meetups and eliminating no-shows. The system is designed for real-world exchange.
Smart Wallets for the smoothest setup. Advanced EOA for experienced crypto users. Your choice.
Hides blockchain complexity behind plain language and role-based actions. It just works.
Off-chain systems (meetups, exchange agreements) are verifiable against on-chain anchors. Trust, verified.
For higher-risk trades, use real local venues to witness the handoff and sign objective results.
Open trustless protocol usable in parallel with Facebook Marketplace, OfferUp, Craigslist, Nextdoor.
Smart Chat automatically drafts smart contracts from the chat context using AI for users to review and send.
Contractly is built as an interlocking puzzle of AWS managed services. No idle capacity, no complex servers to patch. Just functional primitives executing trust logic seamlessly.
Hosts landing page & previews.
Powers core APIs, sync handlers & orchestration.
Authenticates staff securely.
Generates smart contract logic.
Stores listings, state & audit events.
Runs identity & face verification.
Monitors logs & system health.
Reconciles blockchain events.
Hosts media & proof files.
Dispatches push notifications.
Social impact comes from making reuse easier and more trusted. When people feel safer buying second-hand, they are more likely to choose reuse instead of buying new — which supports waste reduction and affordability.
When trust exists in second-hand markets, more people choose reuse over buying new. Less manufacturing. Less packaging. Less landfill.
Affordable second-hand goods become accessible to more people when scam risk is eliminated. Quality items at fair prices — for everyone.
The passkey-based and social-based smart wallet lowers the barrier so non-crypto users can participate, then learn the tech gradually as they complete deals.
“When people feel safer buying second-hand, they choose reuse instead of buying new. That’s how trust changes markets.”
— THE CONTRACTLY THESISBe the first to experience secure second-hand trading. Sign up for early access and help shape the future of trusted commerce.
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