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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

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
D

Doraking

Champion
3
No.2
m

mandylau72

Champion
3
No.3

ShadowBid

Confidential Sealed-Bid Auctions

Tech StackSolidity, React, Web3
Builder
TTed Ogola
DeFiRWA

GrantOps Sentinel live privileged config scanner

Live proof pages for Arbitrum/Base contracts, showing current permission state: owner, proxy admin, implementation, pause state, and Safe config.

Tech StackReact, Next, Web3, Node, Solidity, Python
Builder
YYutong ZHANG
InfraAIOther

ACHIVX

ACHIVX is the financial identity layer for autonomous agents. Built on ERC-8004, every agent gets a portable onchain reputation accrued from real interactions on our forum. x402-style endpoints then price and gate access based on score. Live on Arbitrum and Robinhood Chain.

Tech StackGo, Solidity, Ethers, React
Builder
IIlshat Mukhametzyanov
AIInfraDeFi

ArbiSense

Autonomous AI agent monitoring Arbitrum DeFi (DeFiLlama, Uniswap v3, Aave v3), producing a 0-100 sentiment score and recording each report immutably on-chain via a Solidity contract.

Tech StackSolidity, Web3, Python
Builder
SSteffen Darwin

Reign Alter World copy

X-platform Survival MMORPG w/ unique gameplay-mechanics & “inGame DeFi” (various payment methods & Yield Farm) to be “Self-Sustaining” economic, allowing players to earn through Player Supply & Demand

Tech StackWeb3, Solidity, Unity3D, Firebase, Photon, Blender, GIMP, Audacity
Builder
GGregorius Bangkit Sukarma
GameFiGamingDeFi

Kabon

Kabon is an AI treasury copilot that helps users discover, evaluate, and allocate capital across fragmented DeFi and tokenized asset opportunities on Arbitrum.

Tech StackNext, Web3, Ethers, Solidity, thegraph, React, Arbitrum
Builder
DDickson Kamasah
DeFiAIRWA

Andromeda Core

Andromeda Core is a Verifiable Reputation Layer that transforms on-chain behavior into actionable TrustScores using the AVIP protocol. By utilizing Shannon Entropy for Sybil detection and asymmetric temporal decay, we provide the Arbitrum ecosystem with a tamper-proof infrastructure to audit contributor integrity and secure decentralized governance.

Tech StackReact, Next, Web3, Ethers, Python, Solidity, Rust
Builder
IIlich Blanco
DAOInfraAI

bvcc-hook-analytics

The BVCC Hook Analytics Dashboard — a full-stack Node.js + HTML application that scans all 4 networks (Arbitrum, BSC, Base, Ethereum) in real-time using eth_getLogs, discovers active pools

Tech StackWeb3, Ethers, Solidity, Node
Builder
Ssergio R
DeFiInfra

Monaris

Private programmable finance for stablecoin cashflow, powering spending, credit, BNPL, and automated payments on PayFi rails.

Tech StackReact, Next, Web3, Ethers, Node, Solidity, Railgun
Builder
AAditya Kumar
DeFiAIInfraRWA

Omniflow

Omniflow is an omnichain execution layer for DeFi. Today, cross-chain users must bridge assets, wait, switch networks, and manually interact with a destination protocol. Omniflow removes that friction by letting a user start from one source chain and trigger execution on a destination chain in a single flow. For the Arbitrum Open House Buildathon, Omniflow demonstrates a cross-chain liquidity launch flow powered by LayerZero V2 + compose. A user sends an OFT from a source chain, and the message triggers destination-side execution on Arbitrum, where liquidity can be created and seeded. This launchpad flow is a proof of execution, not the final product. The broader goal is to make cross-chain DeFi feel like one unified environment by turning cross-chain messages into protocol actions: liquidity launches, pool funding, vault deposits, and eventually AMM execution.

Tech StackSolidity, Ethers, React, Node, Web3
Builder
DDavid GRIGNET
InfraDeFi

ANFT

ANFT is a decentralized authorship-first digital painting marketplace where every artwork is painted within the platform and linked to the artist's Decentralized Identifier at the moment of creation where an attestation is registered on-chain, publicly and permanently recording who made the artwork, what it is, and when it was created, which placing verifiable, public authorship data on-chain so anyone can read and verify its authenticity without relying on any central authority.

Tech StackNext, Solidity, Ethers
Builder
AAmin Habouria
NFTSocialFiOther

Cryptomart

CryptoMart is a Decentralized Amazon-like Platform but with crypto payments! 🚀

Tech StackWeb3, React, Ethers, Java, Node
Builder
EElijah Ezeji
RWA
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