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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

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 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

KIZO

We're building KIZO, an anime PFP collection on Robinhood Chain. Right now we're working on letting holders stake their NFTs to earn our own token, $KIZO.

Tech StackJava, Web3
Builder
JJoseph Aderibigbe
NFT

Juniper Lane

Juniper Lane is building the first ever launchpad for RWAs. We are focused primarily on bringing the entire listed fixed income universe onchain via a combination of the launchpad primative and compliant RWA issuance.

Tech StackReact, Web3, Solidity, Node
Builder
JJack Krevitt
DeFiRWA

Custos

A reusable on-chain safety layer (+ off-chain SDK) for consuming Chainlink price feeds on Robinhood Chain Stock Tokens

Tech StackReact, Next, Web3, Solidity, Rust, Node
Builder
RRobbert Abimbola
DeFiRWA

ProofPay

Verifiable stablecoin work-payment receipts anchored on Arbitrum.

Tech StackWeb3, Node, Solidity, Ethers
Builder
AAris Parrondo Barrios
DeFiInfraRWA

BLOB.

We pay you to surf the internet. Literally! The world's #1 AI web activity data aggregation & rewards layer. Surf • Train • Earn.

Tech StackReact/Next.js, Ethers, Viem, Solidity/Hardhat, PostgresSQL
Builder
JJeff O
DeFiInfraAI

Vigil

Session-aware collateral risk layer for tokenized equity on Morpho Blue, built for Robinhood Chain

Tech StackSolidity, Python, Web3, Foundry, TypeScript
Builder
JJumardi N/A
DeFiRWAInfra

PulsarFi

PulsarFi - 1:1 Asset-Backed Indonesian Equity (IDX) Tokenization

Tech StackWeb3, Go, React, Next, Solidity
Builder
HHafiidh Luqmanul Hakim
DeFiRWAAI

NERON & LYRA

AI-guarded DeFi on Robinhood Chain: own full node + explorer, forensic token scanner, non-custodial grid/infinity/copy-trading bots, launchpad with locked LP, staking. All live on mainnet.

Tech StackNode, Ethers, Web3, Solidity, Python
Builder
TThe Architect
DeFiAIInfra

Vigiles

Session keys, not wallet keys — a Stylus (Rust) vault that cages AI trading agents with hard on-chain limits.

Tech StackArbitrum Stylus, Rust, WebAssembly, Solidity, Foundry, Next, viem, MCP
Builder
AArya Rakshit
DeFiAIRWA

Paylock

Accounts-payable escrow: funds stay locked until payee+amount match; mismatch holds; replay is already_settled. Angular+Solidity. Live on Vercel; Arbitrum Sepolia for this buildathon.

Tech StackSolidity, Web3, Angular, TypeScript, viem, Foundry
Builder
NNazar Tolstoy
DeFiRWA

Undertow

On-chain risk scanner using real CME SPAN math to figure out what a portfolio could actually lose, plus a vault that lets you borrow against that number for real.

Tech StackReact, Next, Web3, Solidity, Rust, Node
Builder
GGokhan Ceylan
DeFiInfraRWA

Hashling

Every Robinhood Chain token on one board, ~475k from six launchpads, plus a launchpad built so nobody gets rugburn: liquidity is locked forever and creators keep 80% of fees.

Tech StackWeb3, Solidity, Node, Python, TypeScript, Foundry
Builder
HHashling XYZ
GamingInfraDeFi
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