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
Homeward is a self-service migration protocol that lets Arbitrum Nova ETH holders move their ETH to Arbitrum One through the canonical bridge path without having to separately fund Ethereum L1 gas
The proof layer for capital allocation. Trading bots and AI agents build a track record nobody can rewrite, sealed on Robinhood Chain; allocators compare passports, not promises.
Aruna is a parametric protection market for Uniswap v3 LPs. It measures realized price variance directly from the pool’s TWAP and pays LPs when variance exceeds their strike. LP losses are capped at the upfront premium, while underwriters earn premiums for providing pooled capital.
The Best Rate AMM Perpetual Dex. 0 Fees | 0 Slippage | 0 Maintenance Margin
Pendle for stocks on Robinhood Chain: split a stock token into its price and its dividends. Keep the stock, take dividends as USDG, or sell next year's dividends for USDG today.
Onchain Options AMM DEX for RWA and Crypto 0DTE Options | Social Trading | Structured Product with Token Stocks
Argon is a dual-chain AI-guided Uniswap liquidity vault. Hourly ETH forecasts automatically move WETH/stablecoin liquidity in or out of pools on Arbitrum and Robinhood Chain.
Tokens that screen their own transfers: one on-chain threat registry blocks hackers, drainers & sanctioned wallets across Arbitrum and Robinhood Chain, synced in ~4 s.
Parry helps product teams collect private, evidence-backed feedback through challenges funded with USDG on Arbitrum. Creators select useful contributions, and winners claim rewards onchain.
Mocha is a lending pool that advances working capital to coffee and cocoa exporters as each EU due-diligence step is attested on-chain. An early boost for every lot. European imports of Coffee and Cocoa reached about $35B in 2025. Effective December 30, 2026, every lot of coffee and cocoa placed on the EU market needs due-diligence evidence: where it was grown, that no forest was cleared after 2020, and that it was produced legally in the origin country. The company that first places it on the EU market carries that verification responsibility, and the exporter still waits months to get paid. On Mocha, lenders fund a pool on Robinhood Chain, EU buyers publish their due-diligence policy, and each lot draws a larger advance as its steps are attested — repaid when the buyer pays the contract at delivery and all distributions are settled. All worked out with USDG and our token mocCOF for Coffee and a planned mocKKO for Cocoa.
Piron is the onchain fixed-income operating system, enabling investors to access tokenized yield and issuers to launch, service, and settle programmable fixed-income products.
Market infrastructure for the agent economy on Arbitrum. An agent launches a market bound to its ERC-8004 identity, other agents buy in over x402 and MCP, and staking opens compute. No admin key.