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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

Denaria

Denaria is a fully on-chain perpetual DEX built for the next generation of traders. Denaria delivers a mobile-first trading experience designed to make perpetual trading accessible without sacrificing self-custody or transparency. The protocol is powered by a custom dynamic virtual AMM that combines oracle-based pricing with virtual liquidity. This architecture enables leveraged trading with efficient execution and optimized slippage, while remaining fully on-chain.

Tech StackSolidity, Web3, React, Rust, Node, Stylus, Next, ZeroDev
Builder
TTiziano Tridico
DeFi

ETour - Pure Competition

ETour is tournament infrastructure on the blockchain. Developers inherit this infrastructure by implementing a simple game contract. Players connect their wallets and compete. ETH-in, ETH-out. ETour handles matchmaking, brackets, timeouts, prize distribution, and more.

Tech StackEthers, React, Web3
Builder
KKarim Chukfeh
GamingInfra

teste11 copy

teste 11

Tech StackNode, Move, depin
Builder
Zzorzalcripto cripto
DeFiNFTDAO

AuctionSwipe

Swipe-first live auction marketplace on Robinhood Chain with real-time bidding, admin controls, analytics, and an auto-bid agent.

Tech StackReact, Next, Web3, Ethers, Node, Solidity, AI, Robinhood
Builder
SSoulemane Sow
SocialFiDeFiNFTAI

TAG IT Network

Cryptographic digital twins for physical assets. NFC chips + on-chain lifecycle tracking make counterfeits impossible. Verify any product with a tap. Built on Arbitrum.

Tech StackNext, React, Node, Solidity, Web3, Ethers
Builder
AArtem Kozytskii
RWAAIInfraNFT

Coffhee Bonds

The Coffhee encrypted bond marketplace for the trading of encrypted bond tokens on Arbitrum and Robinhood Chain.

Tech StackNode, Ethers, Solidity, Web3, javascript, React
Builder
LLamont Veal
RWADeFiNFT

PrettySafe.xyz

WebGPU Address Miner to prevent Address Poison, now On Robinhood Chain!

Tech StackWeb3, WebGPU
Builder
VVictor Zhou
Infra

Pledge

Pledge is a habit-staking app that turns missed daily habits into yield-bearing DeFi investments on Arbitrum, creating a new retail distribution channel for on-chain assets.

Tech StackSolidity, Next, Web3, Swift, iOS
Builder
PParv Prabhakar
SocialFiDeFiRWA

Lektra SolarCompute

Solar-powered AI compute marketplace settled on Arbitrum.

Tech StackReact, Next, Python, Solidity
Builder
VVitaly Leokumovich
InfraAI

PrettySafe.xyz

WebGPU Address Miner to prevent Address Poison, now On Robinhood Chain!

Tech StackWeb3, WebGPU
Builder
ZZainan Victor Zhou
Infra

HyperOdd

We're building prediction market infrastructure that powers leveraged prediction market trading like margin or parlays for existing prediction markets with a capital-efficient solvency model

Tech StackReact, Web3, Solidity, Node, Ethers, Next.js, Foundry, Viem
Builder
PPriom Chowdhury
AIDeFiRWA

Pegasus

Yield bearing (mortgage loans) empowering Mortgage Backed Stablecoin

Tech StackSolidity, Web3, Ethers, Node
Builder
SShiv Patel
DeFiRWAInfra
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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