Logo

Open House Archive

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

projects-banner

All Projects

By ProjectBy Buildathon
Learn
  • Explore Course
Build
  • Explore Buildathon
  • Project Archive
Hack
Hack Coming Soon
  • Explore IRL Hackhouse
  • How to Qualify
  • Past Events

Project Highlight

Project Highlight

EduBricks

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

Champion

7th Place

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

Champion

1st Place

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

First Prize

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

Champion

Third Prize

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

Second prize

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

Honorable Surprise Mention

Arbitrum Open House India: Online Buildathon

Builder Highlight

Most Hackathon Won

Most Project Built

Builder Highlight

Most Buildathon Won
s

songsu

Hong Kong
Champion
1
No.1
e

elpabl0.eth

Indonesia
Champion
1
No.2
c

contact ai

Champion
1
No.3
Most Project Built
z

zorzalcripto

regencia
Champion
60
No.1
R

Rick

California
Champion
44
No.2
D

DHRUV PANCHOLI

jaipur
Champion
33
No.3

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
JJulio Cesar Severiche Orellana
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
BBagus Wikan
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
SShubham
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

Repo Protocol

DeFi tokenized the asset side of finance but has no repo - the backbone of institutional funding. Repo Protocol brings title transfer and rehypothecation on-chain. The missing funding primitive.

Tech StackSolidity, Ethers, Web3, React
Builder
AAJ Park
RWADeFiInfra
  • Previous
  • 1
  • More pages
  • 38
  • 39
  • 40
  • More pages
  • 90
  • Next