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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
R

Rinat

Russia
Champion
3
No.2
D

Doraking

Champion
3
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

MintLocke

Autopilot for crypto and tokenized RWA portfolios.

Tech StackReact, Next, Node, Ethers, Web3
Builder
LLeon Hitchens
RWAAIDeFi

bond.credit

The credit layer for the agentic economy.

Tech StackSolidity, Typescript, Python, Web3, Next, React, fastapi
Builder
NNathan Vandy
DeFiAI

sGHS - Stable Ghana Cedi

A regional stablecoin pegged to the Ghana cedi built to power the next era of payments, remittance, cross-border payments and onchain finance in Ghana!

Tech StackSolidity, Web3, Ethers, Node, React
Builder
MMuntala Piniyini Shaibu
RWAInfra

REBEKA: Real Estate Blockchain EKosystem Arbitrum

REBEKA is an institutional-grade RWA infrastructure designed to bridge traditional real estate with on-chain liquidity, solving the two biggest barriers for institutional capital: legal certainty and financial privacy. By leveraging Arbitrum’s high-performance network, we provide a secure framework backed by Mexican Irrevocable Trusts (Fideicomisos). Our protocol introduces two core technological breakthroughs: * The Sovereign Permissioned Layer: A native compliance engine built directly into our Arbitrum smart contracts. Token transfers are strictly restricted to KYC/AML-verified wallets. If a wallet lacks legal authorization, the smart contract automatically reverts the transaction. * Institutional Privacy (Confidential-by-Design): To meet traditional banking privacy standards, we integrated Fully Homomorphic Encryption (FHE) via Fhenix. Investor balances and transaction amounts remain mathematically encrypted (as ciphertext) on the public block explorer, ensuring total confidentiality. Finally, REBEKA is future-proofed for global liquidity. In our next phase, we are integrating LayerZero’s cross-chain messaging to evolve into an omnichain protocol, attracting capital from any network while maintaining Arbitrum as our definitive source of legal truth.

Tech StackSolidity, Arbitrum, Fhenix / FHE, OpenZeppelin, HardHat, React, Next, TypeScript
Builder
RRomualdo Zayas Lagunas
RWADeFiInfra

Kustodia

Escrow API for secure payments and fraud prevention using stablecoins

Tech StackReact, Next, Web3, Ethers, Solidity
Builder
RRodrigo Jimenez
DeFi

QSTN

QSTN is a Web3 survey platform where businesses reward feedback with on-chain incentives. Users participate with just an email and optionally connect a wallet to claim crypto rewards.

Tech StackReact, Next, Web3, Solidity, Java
Builder
OOrrin Campbell
SocialFiGamingAI

ArbiLoop

ArbiLoop is an Arbitrum-native DeFi app for lending, borrowing, and loop strategies.It is non-custodial, automation-first, and focused on safer, more efficient DeFi management.

Tech StackNext, Node, Solidity, Javascript
Builder
AAryan Anand
DeFi

Numo

Numo is an onchain repo market for tokenized treasuries for which traders can borrow at a fixed rate against in FX stablecoins. This a first step to build an onchain fixed income markets for global FX.

Tech StackSolidity, Next
Builder
RRobert Leifke
DeFi

FortiLayer

"Make Arbitrum the default execution layer for institutional capital by providing programmable, composable policy controls that enforce compliance on every on-chain transfer. FortiLayer turns Arbitrum

Tech StackSolidity, Rust, Web3, Ethers, React, Node
Builder
EEmin Karagöz
InfraDeFiDAORWA

bond.credit

The credit layer for the agentic economy.

Tech StackPython, Solidity, Typescript
Builder
NNathan Vandy
DeFiAI

Youtube Summarizer

Summarizes any youtube video by pasting the video URL

Tech StackJava, PHP
Builder
KKehinde Salawu
AI

Youtube Summarizer

Summarizes any youtube video by pasting the video URL

Tech StackJava, PHP
Builder
SSalawu Kehinde
AI
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