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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 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

skew

AI agents that get work done within your budget and rules.

Tech StackWeb3, Next, React, Python, Rust, Solidity
Builder
Uunhuh
InfraAIDeFi

Coffhee Finance

Encrypted privacy-preserving DEX (eAMM)

Tech StackReact, Next, Web3, Ethers, Solidity, Node
Builder
LLamont Veal
RWADeFiNFT

Permit

Permit is programmable payment authorization infrastructure that lets software and AI agents make payments without giving them unrestricted access to a user's wallet.

Tech StackNext, React, Web3, Node, Solidity
Builder
SSourav Chhimpa
DeFiInfraOther

0x6C

Metaverse with focus on professional networking

Tech StackWeb3
Builder
LLucas
SocialFiGaming

Stylus safe

StylusSafe is a next-generation Intent-Based Smart Wallet that makes blockchain boundaries completely invisible. By combining ZeroDev (ERC-4337 Account Abstraction), Passkey Authentication (WebAuthn), and Li.Fi Aggregation Engine, it solves the biggest friction point in crypto today: Cross-Chain Swaps.

Tech StackWeb3, Ethers, Solidity, Node, Rust, React, Next
Builder
OOlaosebikan Ayomi
DeFiInfraSocialFi

TORQUE

Knock-out leverage on NVDA in USDG, live on Robinhood Chain mainnet. Its vault is never short: every position is bought as real NVDA and held, and the most you can lose is your margin.

Tech StackSolidity, React, Next, Ethers, Web3, Python, TypeScript, Foundry
Builder
BBaskar Ayelu
DeFiRWA

GatoPago

Self-custodial payments on Arbitrum. Get paid with a link or a QR code, send to a username, and skip the seed phrases and gas. Your money stays yours.

Tech StackReact, Web3, Node, Solidity, Arbitrum, Cloudlare, Foundry, Firebase
Builder
DDaniel Cueto
DeFiInfraSocialFi

Timax Asset Finance

Idle business cash earns fees on tokenised stocks (Robinhood Chain), with price risk hedged on Hyperliquid and shown by a public Proof of Hedge. Non-custodial, MiCA-authorised. Returns are variable.

Tech StackReact, Solidity, Web3, Ethers, Node, Java, Python, Next
Builder
VValerii Tkachenko
DeFiRWAAI

AXIS

Set. Forget. Earn — on real US stock tokens, not only crypto pools. AXIS already ships gasless Google login yield on Arbitrum One (UXmaxx winner). For Open House we put US stock-token baskets under that same door: say “tech yes, oil no,” get a Robinhood Chain practice basket, and a weekly English note that shows the after-hours/weekend print next to Thursday’s close. Live: https://axis-mainnet.vercel.app Depth (no login): https://axis-mainnet.vercel.app/demo/baskets Proof (after Google): https://axis-mainnet.vercel.app/proof API: https://axis-api-beta.vercel.app

Tech StackReact, Web3, Ethers, Python, Solidity, FastAPI, ZeroDev , Particle UA
Builder
HHenry Marfo
RWAAIDeFi

create-stylus-latest

One command to start an Arbitrum Stylus (Rust) project that deploys on the first try: 9 tested templates (tokens, NFTs, vault, escrow, payment streams, oracle, interop, faucet), USDG presets for Arbitrum One and Robinhood Chain, and an MCP server for AI agents.

Tech StackRust, Solidity, Node, Arbitrum Stylus, TypeScript, viem, Docker, GitHub Actions
Builder
RRam Rex
DeFiInfraAI

Dead Drop

A provably fair treasure hunt on Arbitrum, paid in USDG. The hider seals the board on-chain, every clue is checked by Merkle proof, and a lying or vanishing hider is slashed. No trusted server.

Tech StackReact, Web3, Ethers, Solidity, Hardhat, Vite, Arbitrum, Merkle Tree
Builder
JJames wasonga
GamingSocialFiInfra

Croin

Croin is a token that offers conditional payments where the conditions can be written in plain English. It's a smart contract-powered escrow and credit management protocol deployed on the Robinhood Chain. It bridges the gap between rigid blockchain transactions and nuanced, real-world agreements. By combining an on-chain multi-token settlement engine with a context-rich off-chain dApp, Croin enables trustless peer-to-peer agreements governed by decentralized human arbitration.. It offers Letter of Credit creation in terms of the native token CR or USDG

Tech StackReact, Web3, Solidity, Ethers, Node
Builder
GGaurav Biraris
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