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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

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

Mandate

First ERC-8226 implementation: AI-managed tokenized equities on Robinhood Chain with atomic on-chain mandate enforcement, two-agent reasoning, correlation-aware risk, and examiner-ready compliance rec

Tech StackNext, Node, Solidity, Foundry
Builder
NNidhi Singh
DeFiAIRWA

ChainFlux

ChainFlux is a two layer platform built on Arbitrum Sepolia. The Attention Layer aggregates eight live Ethereum signals into a single score from 0 to 100, transforming raw blockchain data into interpreted signals anyone can understand. The Trading Layer lets traders act on those signals through perpetual markets on Gas price and transactions per block. Blockchain data has always been observable. ChainFlux makes it tradeable. Frontend: https://github.com/azebiri09/chainflux-insights

Tech StackReact, Ethers, Node, Solidity
Builder
GGospel Azebiri
DeFiInfra

LEVER

LEVER is the derivatives layer for prediction markets. It builds on top of the leading prediction markets, letting traders go long or short with leverage on any listed outcome.

Tech StackWeb3, Ethers, Solidity, React, Next, Node
Builder
JJames Park
DeFiInfraOther

Nyxora AI

Nyxora is Your Personal Web3 Assistant—a highly secure, non-custodial AI Middleware that bridges on-chain DeFi execution with off-chain OS automation. Built with a Zero-Trust 3-Tier IPC Architecture and an advanced 4-Layer Cognitive Memory, it empowers users to execute natural language smart-swaps, automate DeFi habits, and connect external agents via MCP on Arbitrum—all without ever exposing their private keys to the AI.

Tech StackReact, Node, Rust, Web3, @napi-rs/keyring, viem, Solidity, Arbitrum
Builder
PPrasetyo Yudhanto
InfraAIDeFi

PHANTOM Protocol

Privacy-preserving prediction markets powered by Fhenix FHE on Arbitrum. Trade forecasts, automated price rounds, and multi-outcome markets while keeping market sentiment and positioning private.

Tech StackSolidity, React, Web3, Ethers
Builder
Mmr ben
DeFiAIOther

Mandate —— Safe Automation for Tokenized Assets

Mandate is a policy firewall for AI-agent finance. It keeps user funds in a smart account and lets agents act only when onchain rules approve, blocking unsafe actions before funds move.

Tech StackNext, Solidity, Web3, React
Builder
SStarry Desert
AIDeFiInfra

ArbiGame Agent

ArbiGame Agent is an AI-powered onchain game builder for Arbitrum. Describe a game idea, and the app uses Gemini to generate a structured GameSpec, Solidity game template, and playable frontend preview. The current demo includes a live solo dice game on Arbitrum Sepolia where players connect a wallet, start a round, roll dice, and claim prizes onchain.

Tech StackReact, Next, Web3, Ethers, Solidity
Builder
TTomoya Hatanaka
GamingAIInfra

FlowState

A hybrid payment protocol that solves the N+1 Signature Problem for AI agent payments. Combining x402's HTTP-native service discovery with continuous MNEE token streams on Ethereum.

Tech StackSolidity, Typescript, React, Vite, Javascript, Tailwind CSS, Gemini API, Arbitrum Ethereum
Builder
DDavid Pratama
AINFTDeFi

Weave

Onchain index protocol for tokenized equities on Robinhood Chain. Create thematic baskets of stocks, earn revenue as a creator through ERC-7641, and get AI-assisted composition from natural language investment theses. For investors, discover thematic indices to buy and hold a diversified stocks portfolios.

Tech StackNext, Web3, Solidity, Go
Builder
IIkeh Chukwuka
RWADeFiAI

bvcc-wallet-agent

BVCC Wallet Agent is a self-custodial smart wallet on Arbitrum with personal and AI-agent modes, using WebAuthn, ERC-4337 and on-chain permissions for safer delegated execution.

Tech StackNext, React, Web3, Solidity, Node, Ethers, ERC-4337, WebAuthn
Builder
Ssergio R
DeFiAIInfra

OBSCURA

Privacy-first financial operating system on Arbitrum powered by Fhenix CoFHE, combining encrypted payments, credit, governance, identity, mobile apps, and AI-agent infrastructure.

Tech StackReact, Web3, Node, Solidity, Ethers, Python, Next, FHE
Builder
MMohamed Wael
DeFiAIInfraDAO

trAIder

A speculation-market protocol on live AI trading performance.

Tech StackSolidity, Python, Next, React, Node, Web3, Typescript, OpenZeppelin
Builder
CChimdalu Ofoegbu
DeFiAI
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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

Aaditya Rawat

Champion
29
No.1
S

Skia Variants

The Blockchain
Champion
14
No.2
A

Akan

Lagos, Nigeria.
Champion
14
No.3