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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

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 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

Twilight DeFi

A trust-first wallet dashboard on Arbitrum Sepolia: nothing is displayed that cannot be derived from live chain state — with a guided tour that walks you through your first on-chain transaction.

Tech StackReact, Next, Solidity, Web3, Foundry
Builder
DDhanush | shinothelegend
DeFiInfra

Demand

Demand is a demand-first marketplace where buyers commit capital before suppliers exist. Capital proves demand; suppliers respond to markets buyers have already created.

Tech StackWeb3, Solidity, TypeScript, Vite
Builder
AAbdulbakky Agboola
DeFiOtherRWA

Goblin- Fully on-chain CLOB

Goblin is a fully on-chain limit order book built on Arbitrum Stylus and Robinhood chain. Matching and settlement both happen on-chain, with no operator and no off-chain

Tech StackRust, svelte, foundry, stylus
Builder
AAnna Onchain
DeFiRWA

SettleOne

B2B on-chain settlement infrastructure that secures transaction funds in escrow, verifies delivery, and keeps eligible committed capital productive under risk controls until settlement.

Tech StackReact, Web3, Ethers, Node, Solidity
Builder
SSourav Yadav
DeFiAIInfra

Causarix

On-chain Fiduciary Oracle & DAO Risk Officer for Arbitrum. Tri-agent AI council & 0.00% math drift Monte Carlo SCM kernel sealing Merkle proofs on Sepolia and verifying via Stylus WASM.

Tech StackSolidity, Rust, React, Next, Web3, Python, Node, Arbitrum Stylus
Builder
NNova
DAOAIDeFiOther

Othello

Othello is a safer onchain savings circle. Friends pay in together, receive the pot in turn, and lock a shared promise so the circle can keep moving if someone stops paying.

Tech StackReact, Next, Web3, Solidity, Node, Rust, Typescript, Anchor
Builder
JJoshua Zekeri
SocialFiDeFiRWA

Nectar Network

Nectar connects lending markets on Arbitrum and Robinhood Chain with funded collateral buyers, enabling atomic liquidations with transparent debt recovery and execution receipts.

Tech StackSolidity, Web3, React, Go, Node, Next
Builder
Mmonalika walia
InfraDeFiRWA

ChainSeal OG

ChainSeal OG (Once Guard) stops recycled and counterfeit packaging in FMCG and pharma.

Tech StackSolidity, OpenZeppelin, Next, Hardhat, React, Viem, qrcode
Builder
RRani S Duan
OtherRWA

Bondline

Protection for people whose AI agents trade for them. Underwriters back an AI trader with USDG on Robinhood Chain. If the market gaps past your loss limit, the agent stops and the bond pays you the rest. Our first claim has paid on testnet.

Tech StackSolidity, Rust, Next, React, Web3, Node, Foundry
Builder
FFrek Ramp
DeFiRWAAI

ParaApe

On-chain cover for a memecoin you still hold. Name how far it must fall. If that drop is still there, you get paid in USDG. One coin cannot spend another's USDG. Robinhood Chain testnet.

Tech StackNext, Solidity, Rust
Builder
TTegar Aji
DeFi

Keep Yours

Savings that keep themselves. Every USDC payment splits on-chain into spend and keep; savings wait before they can leave, and you can take an advance against them. Passkey wallet on Arbitrum.

Tech StackSolidity, React, Next, Node, Foundry, OpenZeppelin, ZeroDev, viem.
Builder
NNimsara
DeFi

Flip the meme

UP or DOWN on the meme coin you follow. FlipTheMeme brings pool-priced prediction rounds to Robinhood Chain, with one-transaction ETH staking and on-chain payouts. A working testnet prototype.

Tech StackReact, Node, Solidity, TypeScript, viem, Foundry, PostgreSQL, Redis
Builder
ССофия Шереметьева
GamingDeFi
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