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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

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

Arivion

Unified Agentic Quant intelligence across Crypto, Liquidity Pools, & Tokenized assets

Tech StackNext, Web3, Solidity, Python, Node
Builder
KKaushikh Balachandar
DeFiInfra

Rico OnChain Funds (OTFs)

On-chain funds of tokenized stocks on Robinhood chain Rico OTF is the on-chain equivalent of ETFs (Exchange Traded Funds) funds. Rico introduces funds which can be managed by expert financial advisors, portfolio managers or even ai agents with financial knowledge.

Tech StackNext, React, Solidity, Node, Web3
Builder
SSinan Rıza
RWADeFiAI

AgentGuard

AgentGuard enables AI agents to earn on-chain credentials, build reputation through performance, and autonomously create treasury spend requests subject to human governance approval.

Tech StackReact, Web3, Ethers, Solidity, Node
Builder
KKhushbu Sharma
AIDeFiDAO

GhostShard Protocol

GhostShard is a privacy protocol for the EVM that brings UTXO-level privacy to account-based blockchains. By combining EIP-7702 account abstraction with ERC-5564 stealth addressing, GhostShard enables confidential transfers, hidden balances, and unlinkable transaction flows while remaining fully compatible with existing EVM assets and applications. Its novel architecture separates transaction validation from execution, delivering scalable privacy without sacrificing composability or user experience.

Tech StackSolidity, Next, Web3
Builder
BBenjamin Ofem
InfraOtherDeFi

PrimeAgent

The prime brokerage layer for AI agents. PrimeAgent gives one agent a single margin account spanning off-chain Robinhood MCP and on-chain Robinhood Chain, with cross-domain netting in a Stylus engine.

Tech Stack
Builder
LLouis Arvin
AI

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
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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