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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
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
R

Rick

California
Champion
16
No.1
D

DHRUV PANCHOLI

jaipur
Champion
15
No.2
H

Hendrix Iphonk

Surabaya, Indonesia
Champion
15
No.3

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

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
NFT

Astrolabe

Tech Stack
Builder
AAbhishek Dubey

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
AAlex
SocialFi

Harsa

An integrated agricultural supply chain platform on Arbitrum, enabling transparent product tracking and secure payments using escrow smart contracts to protect both farmers and buyers.

Tech StackReact, Next, Web3, Ethers, Solidity, Arbitrum, Tailwind, Node
Builder
Ssz
RWADeFi

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
DeFiAIRWA

PuLend

Lending protocol where user can borrow funds using their NFT assets as collateral.

Tech StackNext, React, Web3, Solidity, Node
Builder
FFajar
DeFi

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

frames402

Frame402 demonstrates how Arbitrum Stylus + x402 enable a new class of consumer prediction markets, combining AI judgment, instant micropayments, and social gameplay — built end-to-end during the ha

Tech StackReact, Next, Web3, Rust, javascript, cargo-stylus, arbitrum, stylus-sdk
Builder
SSparsh undefined
SocialFi

Arbivision

ArbiVision lets you monitor real‑time transactions, track DeFi performance, analyze protocols, and visualize on‑chain activity all in one powerful dashboard.

Tech StackReact, Solidity, Web3, Node, Redux, Tailwind CSS
Builder
Ttaoheed tunde
Other

Game Vault

GameVault enables gamers to buy, sell, and trade in-game NFTs with true ownership. Browse the marketplace, list your assets for sale, purchase items instantly, and manage your collection.

Tech StackReact, Next, Node, Web3, Ethers, Solidity
Builder
Ffuppuccino
NFTSocialFiGaming

5xFaction

5xFaction is a no-loss DeFi protocol that gamifies yield farming through strategic faction-based competition. Deposit USDC, choose your faction, compete for yield . "your principal stays 100% safe."

Tech StackSolidity, Next, Web3
Builder
YYeheskiel Yunus Tame
GamingDeFi
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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

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