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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
A

Akan

Lagos, Nigeria.
Champion
14
No.1
S

Skia Variants

The Blockchain
Champion
13
No.2
H

Hafiidh Luqmanul Hakim

Indonesia
Champion
7
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

ProprietaryX

ProprietaryX is an on-chain agentic prop firm on Arbitrum where traders buy an exam, authorize an AI trading agent, pass contract-enforced rules, unlock funded capital, and receive instant payouts.

Tech StackReact, Next, Web3, Node, Solidity, TypeScript, Arbitrum, GMX
Builder
AAustin Lee
AIDeFi

ShortStack

ShortStack is an onchain securities-lending and shorting protocol for tokenized equities on Robinhood Chain. Lenders earn yield on idle stock, traders open collateralized shorts, and a portfolio margin view brings the prime-brokerage experience on-chain — turning hold-only assets into a living, two-sided market.

Tech StackNext, Solidity, Node, Typescript, Foundry, OpenZeppelin, Blockscout Explorer, Rainbowkit
Builder
AAmitesh Patnaik
DeFiInfraDAO

Covenant Prime

On-chain control layer for AI agents managing tokenized securities. Agents act inside bounded covenants; unsafe actions are blocked and produce immutable refusal proofs on Arbitrum.

Tech StackReact, Next, Web3, Solidity, Ethers, viem, Foundry, Arbitrum
Builder
EEmin Karagöz
AIDeFiRWAInfra

Red Sentinel

Red Sentinel is a crowdsourced, gamified AI security learning platform. As a user you deploy AI agents with rules, personality, attack objective and funds. other users try to jailbreak your AI agent with various prompt injection techniques. if they jailbreak it, they get the entire bounty pool.

Tech StackNext, Web3, Solidity, Rust
Builder
SSatyam Bansal
AIGamingSocialFi

AlphaEngine

Confidential Alpha Network for On-Chain Finance

Tech StackNext, Solidity, Ethers, Web3, Node, React, Viem
Builder
KKumar Nilay
DeFiAIInfra

Fhenix Poll

Privacy-preserving ranked-choice voting powered by Fully Homomorphic Encryption (FHE) on Fhenix / Arbitrum Sepolia. Vote totals accumulate homomorphically under encryption.

Tech StackNode, Fhenix, Solidity, VITE
Builder
MMayur Asodara
DAOOther

APTCasino-Arbitrum

⚡️The First Fully On-Chain, Autonomous Provably Transparent Casino. Powered by Arbitrum 250ms + Chainlink 6 blocks Verifiable Randomness Functionality 🛠️🎯

Tech StackNext, Web3, Solidity, Chainlink VRF
Builder
AAmaan Sayyad
GamingSocialFiAI

TaskPay

TaskPay is a quest marketplace on Arbitrum where creators pay users in real USDC for verified actions — follow on Farcaster, engage on X, or do something on-chain like swap or mint. Funds sit in smart contract escrow, verification is automatic, and users claim straight to their wallet. We run as a Dapp and Farcaster Mini App.

Tech StackNext, Web3, Ethers, Node, Solidity
Builder
AAnas Ali
DeFiInfraSocialFi

Thikra

A sovereign token

Tech StackWeb3, Next, Node, Solidity
Builder
Mmohammed alawad
DeFiAI

Hash PayLink copy

Multi-chain USDC payments archived to 0G, letting AI agents verify payment proofs before unlocking paid access, answers, APIs, or services.

Tech StackReact, Web3, Ethers, Node, Solidity, 0G, USDC, Ai Agents
Builder
EEmmanuel Onoja
AIInfraDeFiRWA

Meridian

Meridian is neutral, non-custodial infrastructure for creating ETFs and tokenized-equity baskets that work 24/7, with an honest price even when the market is closed.

Tech StackSolidity, Ethers, Web3, React, Node, TypeScript
Builder
IIldar Absalyamov
RWAInfra

NetPass - DePin Access Control Protocol

A DePIN access control protocol built on Arbitrum. Trustless ETH payments → on-chain session tracking → real-time IoT worker → physical router provisioning.

Tech StackEthers, Web3, React, Solidity
Builder
SSUBIKSHAN RAJ
InfraRWADeFi
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