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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

Builder Highlight

Most Hackathon Won

Most Project Built

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 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
z

zorzalcripto

regencia
Champion
51
No.1
z

zcy22606

chengdu
Champion
26
No.2
D

David Barasa

Kenya
Champion
19
No.3

Arbisper

Arbisper is mainnet-ready, end-to-end encrypted with private keys Web3 messenger with XMTP on Arbitrum under ZK protection

Tech StackWeb3, Ethers, JS
Builder
DDongfang Wu
SocialFi

Verdict

Verdict: Capital-efficient prediction markets for real-world asset strategies. Deploy 100% of your capital

Tech StackReact, Solidity, Ethers, Next, Node
Builder
PPreyanshu MIshra
InfraAI

Rather Protocol

A self-sustaining on-chain economic loop that combines NFT trading, DeFi liquidity pools, and automated treasury management to create continuous buying pressure through deflationary token burns.

Tech StackNext, Web3, Solidity, Tailwind, ethers.js, Hardhat, Arbitrum Sepolia, Bun
Builder
DDevesh K
NFT

Wrap-Up-Arbitrum

Wrap-Up: The verifiable web's intelligence layer. Curate articles with AI, access smart summaries, and earn rewards for building a transparent, community-owned news ecosystem.

Tech StackReact, Web3, Ethers, Node, Solidity
Builder
DDaksh Thakran
SocialFiRWAAI

perpX

perpX is a decentralized leveraged trading protocol that reimagines perpetual futures by introducing forced expiry and outcome-based settlement.

Tech StackReact, Next, Web3, Ethers, Rust, Arbitrum, Stylus, Node
Builder
AAman Jha
DeFi

SlemanFi

A comprehensive DeFi lending protocol built using Solidity (Foundry) and Arbitrum Stylus (Rust)

Tech StackStylus, Next, Web3, Solidity, React, Foundry, Chainlink, Ponder
Builder
AArif Novrian Pratama
DeFi

Seturan FI

A permissionless cross-chain lending protocol powered by LayerZero and built for composability on Arbitrum

Tech StackSolidity, Web3, Next, Ponder, LayerZero, Cross-chain, Arbitrum, Foundry
Builder
Rruina ventura
DeFi

ArbiStream

Real-time, per-second money streaming protocol built on Arbitrum Network.

Tech StackReact, Solidity, Web3, Ethers
Builder
OODION oseiwe
DeFi

stylus-ide

Build, Test, AI Integrated and Deploy Smarter with "npm i create-stylus-ide". Create New Files or Load from GitHub or Interact with On-Chain Contracts.

Tech StackNext, Web3, Rust, Node
Builder
AAaditya Srivastava
Infra

Bountyx

The Trustless Bounty Marketplace on Arbitrum.

Tech StackWeb3, typescript, Next
Builder
MMaaz .
DeFiSocialFiOther

Commit or Donate

Stake ETH/MockUSDC on a promise. Confirm before deadline. A human validator decides success; otherwise the stake is donated.

Tech StackReact, Next, Solidity
Builder
MMuhammad Ihsan
SocialFi

Hash Mahjong

Hash Mahjong transmutes a arbitrum mainnet transfer hash into a deterministic, publicly auditable Mahjong hand with 18 win archetypes, delivering a frictionless GameFi that catalyzes authentic users.

Tech StackWeb3, Ethers
Builder
SShuo REN
SocialFi
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