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Open House Archive

Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.

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Project Highlight

Project Highlight

EduBricks

EduBricks is a platform enabling fractional ownership of tokenized real estate, making investments more accessible

Champion

x

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

Champion

x

Arbitrum X EDU Chain Mini-Hack

Stylish Course to Stylus Smart Contract Development

A comprehensive course on deploying and interacting with Stylus smart contracts on Arbitrum and EDU Chain, featuring a full-fledged Stylus IDE for seamless deployment and interaction.

Champion

x

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

Champion

x

Arbitrum X EDU Chain Mini-Hack

Orbital

A next-gen AMM that supports 2, 3, or even 10,000 stablecoins in a single pool, scaling concentrated liquidity into higher dimensions.

+1
Champion

x

Arbitrum Open House India: Online Buildathon

zkArb SDK

zkArb SDK is a developer toolkit that makes building zero-knowledge apps on Arbitrum simple and fast. It provides plug-and-play Circom circuit compilation, proof generation, and ready-to-deploy verifier contracts, so developers can focus on dApps instead of cryptography.

Champion

x

Arbitrum Open House India: Online Buildathon

Builder Highlight

Most Hackathon Won

Most Project Built

Builder Highlight

Most Buildathon Won
M

Manobendra Mandal

Kolkata, India
Champion
3
No.1
V

Vivek Sahu

India
Champion
2
No.2
s

simp1e

china
Champion
2
No.3
Most Project Built
A

Aaditya Rawat

Champion
29
No.1
A

Akan

Lagos, Nigeria.
Champion
14
No.2
S

Skia Variants

The Blockchain
Champion
13
No.3

FortiLayer

"Make Arbitrum the default execution layer for institutional capital by providing programmable, composable policy controls that enforce compliance on every on-chain transfer. FortiLayer turns Arbitrum

Tech StackSolidity, Rust, Web3, Ethers, React, Node
Builder
KKaptan
InfraDeFiDAORWA

RikuyApp

Rikuy — anonymous corruption reporting on a custom Arbitrum L3. ZK-proven identity, gasless UX, AI-validated evidence, immutable on IPFS. Solidity + Rust/Stylus contracts, 73 tests, live chain, real users in Bolivia. Whistleblowers stay anonymous. Evidence never disappears.

Tech StackSolidity, Rust, Web3, Node, Ethers
Builder
DDaniel Hidalgo
OtherDAO

PulseAid

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.

Tech StackNext, Solidity, Web3
Builder
PPrecious Jeremy
DAOSocialFi

Blackrocq - Private DeFi in Arbitrum

Privacy DeFi powered by FHE. Swap, transfer, earn yield with fully encrypted balances. Prove compliance cross-chain without revealing amounts. Your trades are invisible, your credit travels

Tech StackNext, Web3, Node, Solidity, React, FHE, LayerZero
Builder
MManish Shivabhakti
DeFiInfraOther

Runera

Runera turns real effort into on-chain reputation

Tech StackNext, Web3, Solidity, Postgresql, Prisma
Builder
EEmmanuel Zoe
SocialFiNFTOther

Orinx

Orinx allows users to receive, hold, and send funds onchain while protecting their financial privacy.

Tech StackReact, Next, Vue, Web3, Ethers, Node, Solidity
Builder
SSanjana
DeFiInfraOther

Megamint

A transparent, on-chain lottery and giveaway platform that lets creators and projects engage their fans with fair, verifiable, and fun community experiences.

Tech StackReact, Ethers, Solidity, Web3
Builder
KKen Juniour
GamingNFT

TXExplain

TXExplain is a transaction explainer project that generates a fully detailed explanation of a transaction on Arbitrum One using the transaction hash

Tech StackEthers, Web3
Builder
JJoel Akudike
DeFiDAOAIOther

bitchat - dstealth

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.

Tech StackRust, Solidity, Swift, Helios, TOR, Dilithium , ML-DSA44, BLE mesh
Builder
TTanto Defi
SocialFiDeFiInfra

RoboLend

Borrow WETH against tokenized equities on Robinhood Chain.

Tech StackSolidity, Next, React, Rust
Builder
MMintu Gogoi
DeFiRWA

Minimax

Multi-DEX LP Battle Arena on Arbitrum where liquidity providers compete head-to-head in time-bound PvP matches.

Tech StackReact, Web3, Ethers, Solidity
Builder
CCapin Ho
DeFiGamingAI

Doba

Doba is an onchain audio streaming service.

Tech StackNext, Solidity, TypeScript, Alchemy Account Kit, LayerZero (OApp v2), Arbitrum One, Base, Vercel
Builder
IIan Njuguna
DeFiNFTRWA
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