Open House Archive
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Most Hackathon Won
Most Project Built
Edy Cu
chubbyzroxas
Yayan Fauzi
zorzalcripto
Amaan Sayyad
Aaditya Rawat
Kipio is a decentralized vault for permanent, private ownership of personal content, built to give people lasting control over their digital memories.
A non-custodial gold neobank for humans and AI agents. Buy, save, spend, gift or auto-invest gold, and borrow cash against it in seconds. No credit check, no gas.
We all make promises to ourselves and then break them. CommitX makes those promises harder to ignore by putting real money behind them. Users stake ETH on a goal, and if they complete it, they get their stake back and a share of the pool from those who didn't.
Basqit is a set of tools for Robinhood tokenized stocks: 1) Discover - a fun way to find Stock Tokens: type an idea like “companies with orange logos”, get AI-matched picks, and buy them all in one go. 2) Baskets - build and manage a set of tokenized stocks 3) Gifts - send a tokenized stock as a gift to anyone 4) Packs - A random mix of Stock Tokens inside
Private stablecoin and tokenized-asset payments with a chosen auditor. The sender hides a payment from everyone except the reader they pick — an accountant or a regulator — who can read it but never spend or freeze it. Groth16 proofs, Rust end to end. Live on Solana and Arc mainnet; verifier and both pools deployed on Stylus on Arbitrum Sepolia and Robinhood Chain.
Decentralized, parametric coverage for DeFi Protocols
Every day, people are made promises. Your order will arrive. This draw is fair. Your prize will be paid. Today, all of them run on one thing: "trust me." Keptra replaces "trust me" with proof. A global trust infrastructure on Arbitrum One, with Chainlink bringing the real world on-chain — deliveries, draws, payouts — so anyone can verify them, and nobody needs a wallet to benefit. Two products live today: Verified Delivery and Giveaways & Event Center. Card payments next. Then the Keptra Token.
What if public money could only move with public agreement? DemocraFund is a fully working, deployed system for transparent public tendering. It puts the whole lifecycle of a public project on the blockchain: the bids, the votes, the award, and every payment. Money only leaves the system in stages, and only when the right people cryptographically sign that the work is actually done. Not the committee alone, not the builder alone, not even the administrator alone. Everyone can see every decision the moment it happens, and nobody can move a token without the system's approval. It runs today on Arbitrum Sepolia, piloted with Humewood Golf Club, with 151 automated tests behind it. The result is simple to state: the oversight is no longer a report written after the money moved. It is the machine that moves the money, and it only accepts the public's agreement as the key.
Execution oracle for AI agents: "is it safe to send NOW?" 12 networks measured every 2 s against independent RPC nodes, signed answers, on-chain registry on Arbitrum, pay-per-call in USDC via x402 on Arbitrum One. ETHGlobal + Casper finalist.
Hood Relief is a community relief pool. Someone in trouble a medical bill, a stolen wallet, a lost job, a house fire files a case describing what happened and what they need. The case opens for a five-day community vote. One wallet, one vote. If it clears quorum, funds are released from the shared pool and the payout is written to a public ledger with its transaction hash. No single case can request more than a set percentage of the pool balance. There is a second path that skips all of that: a direct campaign, where the creator names their own payout address and supporters send money straight to it. Hood Relief never holds that money and never releases it. The payout address locks the moment the first donation confirms, so nobody can build an audience on one address and swap in another. The project's home chain is Robinhood Chain, an Arbitrum Orbit L2. Donations are also accepted and verified on Arbitrum One, Ethereum, Base, Optimism, Polygon, BNB Chain, Avalanche, Solana and Bitcoin every transfer is proven server-side against the chain before it counts toward the pool. Members without a wallet sign in with email or Google and get an embedded wallet, because the people this is for are usually not the people who already own a hardware wallet. It is live at hoodrelief.com.
Local-first wallet-security prototype with a working Arbitrum Sepolia policy-commitment demo. Controlled browser tests allow matching requests and block approval, recipient and policy mismatches.
x402-powered AI market intelligence for humans and autonomous agents.