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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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Builder Highlight

Most Hackathon Won

Most Project Built

Builder Highlight

Most Buildathon Won
E

Edy Cu

Jakarta
Champion
1
No.1
c

chubbyzroxas

Champion
1
No.2
Y

Yayan Fauzi

Champion
1
No.3
Most Project Built
z

zorzalcripto

regencia
Champion
61
No.1
A

Amaan Sayyad

Navi Mumbai, India
Champion
34
No.2
A

Aaditya Rawat

Champion
29
No.3

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

Gage.cash

Cash against your stocks and memes. No liquidation: nothing can touch your collateral before expiry; at expiry you choose. Live on Robinhood Chain mainnet.

Tech StackSolidity, Next, React, Python, Node, Foundry, Typescript, view/wagmi
Builder
BBassem Boulfarkat
RWADeFi

Exchequer

Exchequer lets any crypto project issue preferred tokens. A preferred token is a volatile token with downside cover attached.

Tech StackWeb3, Ethers, Solidity, React
Builder
SSabretooth Guyi
DeFiInfraRWA

Baraza Protocal

Reputation-weighted, on-chain arbitration for chamas, ROSCAs, and informal trade partnerships piloted in East Africa, built on Arbitrum with Stylus (Rust) jury selection.

Tech StackReact, Node, Web3, Ethers, Solidity, Rust, Arbitrum, Arbitrum Stylus
Builder
JJames wasonga
SocialFiDeFiInfra

Copycat

OnlyFans for traders. Subscribe to top traders, unlock their private strategies, and automatically copy them across crypto, tokenized stocks, and pre-IPO assets.

Tech StackRust, Solidity, Node, React Native
Builder
PPetar Popovic (Developera)
SocialFiDeFiRWA

OpenWork

Onchain work powered by Arbitrum: hire talent, fund USDC escrow, deliver milestones, and resolve disputes—with Oppy as your wallet-controlled AI assistant.

Tech StackReact, Web3, Node, Solidity, LayerZero, Circle CCTP
Builder
AAnas Mohd
InfraDAOAI

ETour - On-Chain Tournament Protocol

Game-agnostic 100% on-chain tournament framework live on Arbitrum One.

Tech StackSolidity, React
Builder
EETour Games
Gaming

BotHire

Machine-first marketplace where AI agents hire each other and settle gaslessly in USDT & USDC via BotPay — non-custodial; deployed on Arbitrum One.

Tech StackSolidity
Builder
Hhq_1789099204
AI

OtterPot

Challenges between friends with a shared prize pot, run entirely inside Telegram. The pot earns yield while the challenge is live.

Tech StackRust, Nextjs, Cloudflare, Telegram
Builder
MMoises Cisneros
AIDeFi

OrbitRepo

Institutional private credit & fixed-term repo market on Robinhood Chain, powered by Arbitrum Stylus with dynamic Parametric VaR risk pricing for tokenized equities.

Tech StackWeb3, Solidity, Rust, React, Ethers
Builder
NNaufal Satria
DeFiRWA

MerkleLeaf

MerkleLeaf turns forest field data into tamper-proof, on-chain records. Every tree we sample — its location, diameter, height, and spectral index — gets logged to a Vyper smart contract on Arbitrum, hashed against the original field sheet so anyone can verify it hasn't been altered. Built for forestry and carbon-credit projects that need real, auditable evidence instead of editable spreadsheets.

Tech StackPython, Web3, Vyper
Builder
RRodrigo Bogado
RWAInfra

Ethereum File System (EFS)

EFS v1 helps Arbitrum users discover IPFS-hosted app frontends and inspect provenance, verification status, and known limitations before launching.

Tech StackWeb3, Node, Solidity, Ethers
Builder
JJames Carnley
InfraOther

CommitCircle

CommitCircle makes group commitments (saving challenges, shared goals, team pools) non-optional by putting the release rule on-chain: members lock USDC in a circle vault that only unlocks by a quorum vote of member nominations or by a deadline, with exact 1:1 accounting.

Tech StackSolidity, Hardhat, TypeScript, React, USDC, Arbitrum
Builder
CCircle Forge
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