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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
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

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

ETour

100% On-chain gaming. ETH only. Self-sustaining. Impossible to grief. Skill based. No tokens, no servers, no nonesense. https://etour.games/whitepaper

Tech StackSolidity, React, Web3, Ethers
Builder
EETour Games
GamingInfra

Apollos Finance

The Autonomous Hedge Fund System that Implement the Cross-Chain, LVR-Protected, & Linearized Yield Protocol.

Tech StackReact, Next, Web3, Ethers, Node, Solidity, Gemini AI, Chainlink
Builder
BBagas Rizki Gunardi
DeFiAIOther

ETour

I built the first 100% on-chain, ETH-in ETH-out (no new token), skill based competitive gaming platform. No tokens, no servers, no nonesense. https://etour.games/whitepaper

Tech StackSolidity, React, Web3, Ethers
Builder
EETour Games
GamingInfra

DARX - ZK Dark Pool

Private Trading, Powered by Zero-Knowledge Proofs. Trade any token in size with zero price impact with crypto's first decentralized crossing network. Live today on Arbitrum Ecosystem.

Tech StackNext, Web3, Solidity, Circom , Groth16, SnarkJS, Express JS, Supabase
Builder
ZZaky Irsyad Rais
DeFi

Aurion Protocol

Aurion is a non-custodial credit layer that aggregates DeFi positions across Aave and Compound, enabling higher leverage through delegated credit guarantees.

Tech StackReact, Ethers, Solidity, Java
Builder
AAliyu Aliyu
DeFi

MERGE PROTOCOL

The decentralized execution layer for Web3 gigs. Merge Protocol replaces middlemen with smart contract escrow on Arbitrum, UI-assisted GitHub PR verification, and encrypted XMTP wallet chat. (191 char

Tech StackNext, React, Solidity, Ethers, Node
Builder
AAyanfeoluwa Grandeur
Infra

Formicarium

Formicarium is a decentralized platform where an AI agent coordinates a fleet of autonomous machines and robots to manufacture customized products.

Tech StackWeb3, Python, Solidity
Builder
NNejc Rožman
AIOther

GainJar

GainJar is a decentralized payroll streaming protocol that transforms salary from a monthly event into a continuous, real-time stream on the blockchain. Employees earn second by second and

Tech StackNext, Solidity
Builder
Ssyafiqsan
DeFi

Zeva

Zeva is an intelligent agentic system that manages your wealth on Arbitrum. We wanted to make DeFi as easy as sending a DM. With Zeva, you don't need to be a crypto expert to earn yield. You just tell Zeva what you want to do, and it executes the strategy for you. It’s secured by ZK-Email and your phone's biometrics, so you get the ease of a bank with the security of a hardware wallet.

Tech StackSolidity, React, Next, Web3, Node
Builder
SSeun Victor
InfraDeFiAI

Lion Yield Agent

LionHeart is a Chat-First DeFi Intelligence Platform built on Arbitrum. It pairs every user with OpenClaw — an AI agent that doesn't just answer questions, but proves its competence on-chain. Think of it as a personal quant analyst that: 🎓 Teaches you DeFi (interactive lessons + quizzes) 🔍 Hunts the best yields across 10+ Arbitrum protocols in real-time 📊 Researches markets with live TVL, APY, and risk-tier analysis 🛡️ Earns your trust through an on-chain reputation score (ERC-8004 NFT) 💼 Executes trades only after reaching reputation ≥ 100 (reputation-gated)

Tech StackNext, Web3, Ethers, Solidity
Builder
PPham Dat
DeFiAIOther

Lion Yield Agent

Tech StackNext, Web3, Ethers, Solidity
Builder
NNim
DeFiAIOther

Stylend

Cross-chain lending protocol built with Arbitrum Stylus (Rust) and LayerZero. Supply collateral on Arbitrum, borrow on other chains like Base. Collateral stays on Arbitrum with isolated pools for risk

Tech StackArbitrum Stylus, Rust, LayerZero, Next, React, Arbitrum, Cross-chain, WASM
Builder
AAxel Urwawuska A
DeFi
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