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
zorzalcripto
zcy22606
David Barasa
An AI multiplayer game builder and creator economy.
WorkProof is a Web3-powered ERP module built on Arbitrum One that transforms professional credentials into verifiable on-chain assets. It enables talent to mint Soulbound Tokens (SBTs) as immutable proof of their work experience, monetize their profiles through paid access passes with automatic royalties, and execute freelance service contracts with full payment guarantees via on-chain escrow. Built with Rust, Vue 3, and Solidity, it connects talent, companies, and validators in a trustless ecosystem where reputation has real economic value.
GainJar is a decentralized payroll streaming protocol that transforms salary from a monthly event into a continuous, real-time stream on the blockchain. Employees earn second by second and
ArbiSecure: Trustless service escrows on Arbitrum Stylus. Secure, low-gas payment links for the global gig economy that ensure instant settlement and eliminate platform fees.
a p2p marketplace for files
Personal AI DeFi agent: one place to design, deploy, and execute intelligent on-chain workflows through natural language.
Impulse was born from a simple idea: anyone should be able to change the world with a single tap. Our mobile app connects people with social causes they care about and allows them to support those initiatives using crypto — instantly, transparently, and without intermediaries. Whether it's helping families, rescuing animals, protecting the environment, or improving local communities, Impulse gives everyone the power to take action and create real impact. Because small contributions, when combined, can transform entire communities.
Flibber is the world’s first scam-resistant DeFi ecosystem that fixes three massive pain points in decentralized finance: inefficient bridging, scam-heavy fiat on/off-ramps, and low-quality NFT floods
Payrium is building a utility-first wallet with token-gated governance (DAO), designed for everyday users and long-term community ownership.
We make Crypto and Stablecoins spendable in emerging markets (Starting with Kenya), directly from Arbitrum, without forcing users to cash out first.
Send crypto to Telegram users who've never touched a wallet.
PulseAid is a decentralized charity platform on Arbitrum that uses zero-knowledge proofs for private institution verification, economic staking to prevent fraud, and smart contract escrow to secure donations. Institutions stake funds, raise money transparently, and submit proof of impact before receiving funds. Donors track every dollar through 6 transparency layers and see exactly where their money goes. With optimistic governance, automatic proof validation, and near-zero fees (~0.1%), PulseAid makes charity transparent, efficient, and unstoppable - ensuring donations reach those who need them most.