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
Manobendra Mandal
Vivek Sahu
simp1e
Aaditya Rawat
Kaptan
Gwill❤️🔥
REBEKA is an institutional-grade RWA infrastructure designed to bridge traditional real estate with on-chain liquidity, solving the two biggest barriers for institutional capital: legal certainty and financial privacy. By leveraging Arbitrum’s high-performance network, we provide a secure framework backed by Mexican Irrevocable Trusts (Fideicomisos). Our protocol introduces two core technological breakthroughs: * The Sovereign Permissioned Layer: A native compliance engine built directly into our Arbitrum smart contracts. Token transfers are strictly restricted to KYC/AML-verified wallets. If a wallet lacks legal authorization, the smart contract automatically reverts the transaction. * Institutional Privacy (Confidential-by-Design): To meet traditional banking privacy standards, we integrated Fully Homomorphic Encryption (FHE) via Fhenix. Investor balances and transaction amounts remain mathematically encrypted (as ciphertext) on the public block explorer, ensuring total confidentiality. Finally, REBEKA is future-proofed for global liquidity. In our next phase, we are integrating LayerZero’s cross-chain messaging to evolve into an omnichain protocol, attracting capital from any network while maintaining Arbitrum as our definitive source of legal truth.
QSTN is a Web3 survey platform where businesses reward feedback with on-chain incentives. Users participate with just an email and optionally connect a wallet to claim crypto rewards.
Super Squares is an onchain version of the popular SuperBowl Game Squares , featuring tradeable NFTs that represent each Square , supporting NBA and NFL events , adding NCAA March Madness and World Cup in the future.
Send crypto to Telegram users who've never touched a wallet.
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
Providus is an institutional-grade risk engine that runs directly on-chain using Arbitrum Stylus. It computes Value at Risk (VaR) and Expected Shortfall (ES) — the same metrics banks use to evaluate portfolio risk without relying on a centralized server or a trusted oracle. The core breakthrough is a Log-Space Optimization that removes computationally expensive exponential functions from the Monte Carlo simulation loop. This makes 10,000-path simulations viable on-chain for the first time — something impossible on standard EVM due to gas constraints. Arbitrum Stylus (Rust → WASM) is the only execution environment where this works. The full product ships with: a live Protocol Stress Test Simulator (Aave V3, Maker, Compound presets), cryptographic on-chain proof generation, PDF report export, a developer API with tiered billing, API key management, webhooks, and a TypeScript SDK.
LifeVault is a non-custodial inheritance and savings protocol built on Arbitrum Sepolia using Arbitrum Stylus (Rust).
A permissionless cross-chain lending protocol powered by LayerZero and built for composability on Arbitrum
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StylusArena gamifies DeFi education. Players train AI agents through gameplay—no coding required. Agents deploy as Stylus contracts on Arbitrum, ready to execute real trading strategies autonomously.
LifeVault is a non-custodial inheritance and savings protocol built on Arbitrum Sepolia using Arbitrum Stylus (Rust).
StylusArena gamifies DeFi education. Players train AI agents through gameplay—no coding required. Agents deploy as Stylus contracts on Arbitrum, ready to execute real trading strategies autonomously.