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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
E

Edy Cu

Jakarta
Champion
1
No.1
c

chubbyzroxas

Champion
1
No.2
Y

Yayan Fauzi

Champion
1
No.3
Most Project Built
z

zorzalcripto

regencia
Champion
61
No.1
A

Amaan Sayyad

Navi Mumbai, India
Champion
34
No.2
A

Aaditya Rawat

Champion
29
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

Vigil

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

Tech StackSolidity, Python, Web3, Foundry, TypeScript, React
Builder
MMDlog -
DeFiRWAInfra

ArbGuard

Deterministic invariant detection for DeFi protocols on Arbitrum — replay a seeded op sequence against real on-chain state, re-check every invariant after each op, and store violations as verifiable on-chain receipts

Tech StackSolidity
Builder
Ttqbmuqbltx88
Solidity

PulsarFi

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

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

Discrete

Engineered to bring bank-grade privacy to decentralized finance. Unlike standard mixers, depositors can generate viewing keys to grant specific counterparties or auditors on-demand decryption access.

Tech StackArbitrum
Builder
SSkia Variants
InfraOtherDeFi

NERON & LYRA

Risk layer for Robinhood Chain: a live sell test and Risk Level for every token, a can't-sell gate in our Desk and non-custodial bots that stop buying traps. Own node, open contracts.

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

Standing

Chains can only push, so stablecoins have no subscriptions and no chargebacks. Standing is a capped, revocable onchain mandate where each charge sits in escrow through a reversal window, and the right to reverse is earned through clean payment history.

Tech StackSolidity, Foundry, OpenZeppelin, Next, Wagmi, TailwindCSS, Typescript, Uniswap Permit2
Builder
RRaymond Abiola (Raymond)
DeFiInfra

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
ННазар Толстой
DeFiRWA

HyFi

PropAMM platform bringing CEX liquidity to tokenized stocks.

Tech StackSolidity, Web3, Next, Python
Builder
JJames
DeFiInfraRWA

OnStock

OnStock is a cross-chain trading infrastructure for tokenized stocks (RWA). Same stock, different chains, different issuers, different prices — OnStock finds the best price and executes cross-chain swaps automatically.

Tech StackNext, Rust, Solidity, React
Builder
OOnstock
RWADeFi

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, over 548k from six launchpads with more to add, 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
InfraDeFiRWA
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