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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

Bellswap

Layer 1 Bellguard verifies token origin on Robinhood Chain mainnet and testnet. Layer 2 Bellswap swaps on testnet only. Layer 3 is the bsX0 token layer, a USDG-collateralised synthetic. Unaudited.

Tech StackSolidity, React, Node, Foundry, Uniswap v4, Arbitrum retryable tickets, Chainlink, Ponder
Builder
RReza Shokri
DeFiRWAInfra

Laxu

Make your position capital efficient. Laxu tokenizes your perp positions on Robinhood Chain so you can borrow USDG against it and earn creator fees when others buy in.

Tech StackNext, Solidity, Ethers, React
Builder
SSinachi Ajuzie
DeFiRWAOther

Exit Market

Sell a pending Arbitrum withdrawal now instead of waiting 6.4 days. Exit Market proves it is real and unclaimed on-chain, against the rollup's own commitments. No oracle, no committee.

Tech StackSolidity, Rust, Next, React, Web3, Node, Stylus, viem
Builder
MMohamed Aaftaab
DeFiInfra

Homeward

Homeward is a self-service migration protocol that lets Arbitrum Nova ETH holders move their ETH to Arbitrum One through the canonical bridge path without having to separately fund Ethereum L1 gas

Tech StackReact, Next, Web3, Ethers, Solidity
Builder
AAkeem Oyeneye
Infra

Quantt

The proof layer for capital allocation. Trading bots and AI agents build a track record nobody can rewrite, sealed on Robinhood Chain; allocators compare passports, not promises.

Tech StackSolidity, Ethers, Node, Python, Web3
Builder
MMike Mike
DeFiAIRWAInfra

Aruna

Aruna is a parametric protection market for Uniswap v3 LPs. It measures realized price variance directly from the pool’s TWAP and pays LPs when variance exceeds their strike. LP losses are capped at the upfront premium, while underwriters earn premiums for providing pooled capital.

Tech StackWeb3, Node, Solidity
Builder
Xxris
DeFi

Purplex

The Best Rate AMM Perpetual Dex. 0 Fees | 0 Slippage | 0 Maintenance Margin

Tech StackVue, Web3, Ethers, Node, Solidity
Builder
PPiyakarn Nimmakulvirut
DeFiRWAOther

Exdiv

Pendle for stocks on Robinhood Chain: split a stock token into its price and its dividends. Keep the stock, take dividends as USDG, or sell next year's dividends for USDG today.

Tech StackReact, Web3, Solidity, Node
Builder
SSanchay Singh
DeFiRWA

Robin.Callput.app

Onchain Options AMM DEX for RWA and Crypto 0DTE Options | Social Trading | Structured Product with Token Stocks

Tech StackNext, Web3, Solidity, React
Builder
Aaair yg
DeFiRWA

Argon

Argon is a dual-chain AI-guided Uniswap liquidity vault. Hourly ETH forecasts automatically move WETH/stablecoin liquidity in or out of pools on Arbitrum and Robinhood Chain.

Tech StackWeb3, Next, Ethers, Python, Solidity, Node, React
Builder
WWang Samuel
DeFiAIInfra

ChainGuard

Tokens that screen their own transfers: one on-chain threat registry blocks hackers, drainers & sanctioned wallets across Arbitrum and Robinhood Chain, synced in ~4 s.

Tech StackSolidity, Web3, Node, TypeScript, React, Foundry, viem
Builder
00xBreak
DeFiInfraOther

Parry

Parry helps product teams collect private, evidence-backed feedback through challenges funded with USDG on Arbitrum. Creators select useful contributions, and winners claim rewards onchain.

Tech StackEthers, Node, Solidity, Java, Arbitrum, HTML/CSS, Supabase, OpenZeppelin
Builder
EElijah Oreoluwa
Other
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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