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
Akan
Skia Variants
Hafiidh Luqmanul Hakim
Pinaivu is private, verifiable AI for healthcare and medical R&D, built on Arbitrum. Independent GPU operators compete in a real-time auction to serve each prompt, prompts are encrypted end-to-end so no one not even the operator can read patient or research data, and every response produces a cryptographically signed, on-chain-auditable receipt. Payments settle trustlessly on Arbitrum and records are archived to IPFS confidential and provable AI, delivered via a chat app and an enterprise API.
Verus provides the BEST possible execution for perp trades across 100+ markets
Personalized agents to run delta-neutral basis trade strategies
Hero Network is the audit and verification layer for AI agents and physical AI. As autonomous agents and robots take on consequential work, the record of what they actually did is missing. Our Proof of Action primitive turns every material action an AI takes, an agent decision or a robot movement, into a tamper-evident, per-action record that any customer, insurer, auditor or regulator can verify independently, for a fraction of a cent, while the AI's rules stay sealed. Every record climbs a four-level trust ladder, from a signed log, to hardware-attested execution, to on-chain anchoring on Arbitrum, to zero-knowledge proofs. The protocol has no token and no admin keys, with roots on-chain. This opens a USD 265 billion market. Today, testing, inspection and certification firms such as SGS, Bureau Veritas, DNV, TÜV and BSI verify that a system meets safety and quality standards, then issue a certificate: a stamp valid at a single point in time that cannot cover how the system behaves once it is deployed. Yet the EU AI Act and the incoming EU Machinery Regulation now require in-service logging and human oversight for AI-enabled systems, which a one-time certificate cannot satisfy. Hero is the continuous, in-service evidence layer those firms resell, and the deployers they certify buy directly. We anchor the world's AI actions on Arbitrum.
Strats is an engine that turns trading strategies into instruments. Multi-leg, multi-venue, multi-asset positions, executed as one asset, governed by on-chain policy, with a signed receipt at every settlement. This weekend we plugged both Arbitrum and Robinhood Chain venues into it.. Our target audience is: creators such as pro traders and quants, consumers such as sophisticated holders of vault instruments and long term allocators such as treasuries and family offices.
Vitalik Buterin Landed on Our Thesis Crypto is the riskiest major asset class in history. And yet — it has almost zero infrastructure for managing that risk. In traditional finance, risk transfer products are an $18 trillion market. In crypto? Essentially zero. That is a critical infrastructure gap. If crypto risk follows the same evolutionary arc as TradFi — and it will, because institutions will demand it — the on-chain risk market is a $350 billion opportunity. This isn't just our thesis. In February 2026, Vitalik Buterin challenged DeFi builders to stop iterating on stablecoins and "dig a layer deeper" into the real underlying problem — risk management and hedging. Then in June, he went further, publishing a research post proposing a new primitive for risk transfer and price stability: split an underlying asset into two halves that swap risk using synthetic options, instead of relying on debt and liquidations. That is, almost line for line, the architecture we've been building. So when the most credible architect in crypto independently lands on the same thesis as you, this stops being a bet on a thesis. It becomes a question of who builds it first. That's us. We're building the missing risk layer of crypto — we tokenize risk and make it tradeable.
Regulated home-currency settlement for AI-agent payments We give a small business a simple, non-custodial way to turn the stablecoins it receives into ordinary money in its bank account — in minutes, and without an exchange.
The private P2P execution environment for trading desks and market makers on Robinhood Chain. Trade tokenized stocks and crypto at scale, with private, atomic, and compliant settlement.
https://tortuga.estate/ Our data room that includes detailed project description and products that are live in the traditional finance world, ready to be brought on-chain: https://drive.google.com/drive/folders/1klWlssiytxiGvrKxemNBNsMhH-q3JXpw Tortuga brings institutional real estate bonds on-chain — existing, regulated, cash-flowing securities. We are a Luxembourg-incorporated platform connecting on-chain capital with institutional real-world investments, combining TradFi structuring discipline with crypto-native distribution. We convert ISIN-coded, bankruptcy-remote real estate debt instruments (RELINCs) into permissioned on-chain tokens, wrapped through ring-fenced Luxembourg securitisation compartments. These are bankable assets previously accessible only to HNWIs through private banks and wealth advisors — now available to on-chain treasuries, vaults, and sophisticated crypto-native allocators. Our pipeline is powered by Estating: our Luxembourg-based origination partner — operating since 2018, PwC–audited, with $60M+ structured across 20+ deals, zero principal losses, and 5–28% IRR.
AlphaYields is the yield layer of DeFi — diversified onchain yield through a single liquid asset. We issue ayTokens: one liquid, yield-bearing token per asset, but where most yield tokens earn from a single source, an ayToken holds a diversified portfolio of verified DeFi strategies — for any asset you hold (ETH, BTC, FLOW, USD). Deposit once and hold the ayToken; underneath, we discover, verify, allocate, and rebalance across strategies, with every figure computed from chain and verifiable at any block.
CollateralRails is a trust and protection layer for AI agent payments. As AI agents begin making autonomous purchases, existing payment protocols can authorize and execute transactions, but they do not fully answer one critical question: can the seller be trusted to deliver? For high-value commerce, escrow, arbitration, and human dispute resolution may work. But for small agentic payments, such as API calls, tool usage, data access, or micro-services, those models are too slow and too expensive. A $0.03 transaction cannot support a manual dispute process. CollateralRails solves this by shifting protection from buyer-side escrow to seller-side accountability. Sellers register on-chain and post a performance bond. AI agents can then pay sellers directly, but only if they satisfy predefined policy rules. After payment, the seller must provide a valid delivery receipt. A watcher verifies the receipt and updates the seller’s reputation. If delivery succeeds, the seller’s reputation improves. If delivery fails, or no valid receipt is provided, the buyer is automatically refunded from the seller’s bond. The seller is slashed, reputation is reduced, and repeated failures can lead to delisting. Buyer funds are never escrowed. Payments remain fast and direct. Trust comes from bonded sellers, automated verification, and programmable enforcement. CollateralRails makes agentic commerce safer by giving AI agents a simple trust rule: Pay only sellers who are bonded, verified, and within policy limits.
Denaria is a self-custodial perpetual DEX built for the next generation of traders. Denaria delivers a mobile-first trading experience designed to make perpetual trading accessible without sacrificing transparency. The protocol is powered by a custom dynamic virtual AMM that combines oracle-based pricing with virtual liquidity. This architecture enables leveraged trading with efficient execution and optimized slippage, while remaining fully on-chain.