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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

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
55
No.1
R

Rick

California
Champion
44
No.2
A

Amaan Sayyad

Navi Mumbai, India
Champion
33
No.3

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

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

APT-Casino Arbitrum

A Fully On-Chain, Provably-Fair Casino Powered by Polygon x Pyth Entropy 6 blocks lightning VRF

Tech StackNext, React, Solidity, Supabase, Livepeer, Chainlink VRF, Cursor, Vercel
Builder
AAmaan Sayyad
SocialFiGamingNFT

OrbitFinanceV2

A Hybrid Self-Repaying Lending Protocol Combining DeFi + Real-World Assets

Tech StackReact, Next, Web3, Node, Solidity
Builder
DDIPTI PATHAK
DeFiRWANFT

SlemanFi

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

Tech StackStylus, Next, Web3, Solidity, React, Foundry, Chainlink, Ponder
Builder
HHafsidee
DeFi

OrbitFinanceV2

A Hybrid Self-Repaying Lending Protocol Combining DeFi + Real-World Assets

Tech StackReact, Next, Web3, Node, Solidity
Builder
DDIPTI PATHAK
DeFiRWANFT

LockD

LockD: The Web3 accountability protocol. Stake crypto as a hostage for your goals. Miss a deadline? Assets freeze. Turn loss aversion into pure productivity.

Tech StackNext, React, Node, Web3, Solidity, Arbitrum
Builder
FFarros Mufid
SocialFiOther

Z-Lag

ZeroLag is a decentralized AI agent marketplace where users create, trade, and run autonomous agents. Access, usage, and rewards are powered by the ZLAG token.

Tech StackReact, Web3, Ethers, Node, Solidity, Next
Builder
MMohit Mohit
DeFiAIRWA

No Risk Arbitrum Pot

This project is a decentralised blockchain based zero loss lottery system.

Tech StackReact, Web3, Ethers, Node, Solidity
Builder
RRahul Rathore
GamingDeFi

GuessFi-Arbitrum

一款休闲字谜卡牌游戏

Tech StackSolidity, Ethers, React, Rust
Builder
BBraised six
Gaming

STARK zk Coprocessor

STARK zk coprocessor unlocks pure ZK scalability on Arbitrum. We achieve 2.1x gas savings and 40% faster finality by verifying raw STARK proofs directly via Stylus, eliminating the wrapping tax.

Tech StackRust, Solidity, Web3, Next, React, Ethers
Builder
JJinu Kim
Infra
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