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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

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

Privacy Protocol

The simple, seamless and secure way for developers to build confidential dApps

Tech StackSolidity, Rust, Next, React, Web3
Builder
OObaloluwa Olusoji
OtherInfra

Decentralized Lottery

A provably fair, decentralized lottery on Arbitrum with Chainlink VRF, staking mechanics, and sustainable tokenomics for long-term engagement.

Tech StackSolidity, React, Web3, Node, Foundry, Javascript
Builder
NNnaemeka Agwara
DeFiGaming

Decentralized Lottery

A provably fair, decentralized lottery on Arbitrum with Chainlink VRF, staking mechanics, and sustainable tokenomics for long-term engagement.

Tech StackReact, Web3, Solidity, Node, Arbitrum, Javascript
Builder
Nnnaemeka agwara
DeFiGaming

Hush

Brings private DeFi UX to Aave: shield funds, supply USDC, borrow WETH, repay, and withdraw back to private balance without exposing your strategy

Tech StackReact, Ethers, Node, Solidity, Vite, Foundry, Web3
Builder
MMike Krupin
DeFiOtherInfra

Cassa

Cassa is a new deterministic on-chain infrastructure that turns risk into liquid, tradable markets.

Tech StackSolidity, React, Vue, Ethers
Builder
LLuca Bernardi
DeFiInfraRWA

Cassa

Cassa is a new deterministic on-chain infrastructure that turns risk into liquid, tradable markets.

Tech StackSolidity, React, Vue, Ethers
Builder
LLuca "MajeStyle" Bernardi
DeFiInfraRWA

ArrowHead Protocol

Verifiable Sequencer Latency Profiling for High-Frequency DeFi & RWA on Robinhood Chain.

Tech StackSolidity, Python, Web3, Node
Builder
ZZEMMEI IIZUKA
DeFiInfra

ArrowHead Protocol

Verifiable Sequencer Latency Profiling for High-Frequency DeFi & RWA on Robinhood Chain.

Tech StackSolidity, Python, Web3, Node
Builder
ゼゼッティーチャンネル
DeFiInfra

Colateral-X

Unlocking $1.8T in SME liquidity via Arbitrum Stylus. The first RWA lending protocol with a Rust-based Risk Engine, offering 99% gas savings for micro-loans in LATAM.

Tech StackRust, Solidity, Next, React, Vue, Ethers, Web3
Builder
LLucas Jim Cifuentes Buigley
RWADeFiInfraDAO

Colateral-X

Unlocking $1.8T in SME liquidity via Arbitrum Stylus. The first RWA lending protocol with a Rust-based Risk Engine, offering 99% gas savings for micro-loans in LATAM.

Tech StackRust, Solidity, Next, React, Vue, Ethers, Web3
Builder
LLucas Cifuentes
RWADeFiInfraDAO

Paxr

The decentralized, privacy-first ticketing platform that ends scalping and ticket fraud while giving fans real ownership and social features.

Tech StackReact, Web3, Ethers, Solidity
Builder
MMoses Sunday
SocialFiNFTRWA

Impulse (Connect social causes with Crypto)

Impulse was born from a simple idea: anyone should be able to change the world with a single tap. Our mobile app connects people with social causes they care about and allows them to support those initiatives using crypto — instantly, transparently, and without intermediaries. Whether it's helping families, rescuing animals, protecting the environment, or improving local communities, Impulse gives everyone the power to take action and create real impact. Because small contributions, when combined, can transform entire communities.

Tech StackSolidity, Flutter, Firebase
Builder
JJulio Gaviria
SocialFi
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