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.
imagine what the biggest Uniswap pool could be
A private "offline-first" chat app with built-in Post-Quantum ethereum wallet. Sign transactions and broadcast them over bluetooth mesh network to find a peer connected online to relay it to a RPC.
Borrow WETH against tokenized equities on Robinhood Chain.
Multi-DEX LP Battle Arena on Arbitrum where liquidity providers compete head-to-head in time-bound PvP matches.
Farcaster native game (mini app) where players wager ETH spotting AI clones. Built on Arbitrum with Solidity + Rust for on-chain reputation & Proof of Humanity.
Get stable, or die trying! Diversifi leverages real world assets like gold on arbitrum alongside global & regional stablecoins on celo to enable users to protect their savings & income from inflation
Doba is an onchain audio streaming service.
DeFi tokenized the asset side of finance but has no repo - the backbone of institutional funding. Repo Protocol brings title transfer and rehypothecation on-chain. The missing funding primitive.
Instead of turning the blockchain into a fully opaque privacy layer (which undermines the transparency that made blockchains valuable in the first place), we built StealthPay—an opt-in privacy primitive for users who don’t want their on-chain activity easily trackable, while still preserving the public verifiability of transactions. StealthPay is built on ERC-5564 (Stealth Addresses) and ERC-6538 (Stealth Meta-Address Registry), using the stealth “announcer” flow to enable users to send and receive funds on-chain via one-time stealth addresses rather than their public wallet address. For this hackathon, we shipped an MVP focused on core stealth transfers. Post-hackathon, we plan to expand with features like P2P flows, ENS-based routing (we hit an ENS resolver issue on Arbitrum during implementation, which we also want to support as a first-class feature), a message/inbox experience, and other privacy-forward UX improvements.
TXExplain is a transaction explainer project that generates a fully detailed explanation of a transaction on Arbitrum One using the transaction hash
One-click for Private Perpetuals
EqualFi is a trust minimized DeFi protocol built around Position NFTs and explicit encumbrance. It offers 0% interest self secured loans, solo and community maker AMMs, maker auction markets (MAM curves), physically settled options and P2P Lending. All without Oracles and No Liquidations
Most Hackathon Won
Most Project Built
Manobendra Mandal
Vivek Sahu
simp1e
Manjeet Sharma
Rick
DHRUV PANCHOLI