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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

7th Place

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

Champion

1st Place

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

First Prize

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

Champion

Third Prize

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

Second prize

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

Honorable Surprise Mention

Arbitrum Open House India: Online Buildathon

robinbulk

bulksent for robin testnet

Tech StackWeb3, Node, Solidity, Python
Builder
Ggeneral general
DeFiOtherInfra

DotPay

We make Crypto and Stablecoins spendable in emerging markets (Starting with Kenya), directly from Arbitrum, without forcing users to cash out first.

Tech StackReact, Next, Ethers, Node
Builder
NNashons Agate
DeFi

ArbiLink: Universal Cross-Chain Messaging Hub

A universal cross-chain messaging protocol that positions Arbitrum as the central hub for multi-chain communication, enabling developers to build once on Arbitrum and reach users on any blockchain.

Tech StackEthers, Solidity, Rust, WebAssembly (WASM), Arbitrum Stylus, Cross-chain messaging, viem, React
Builder
AAkinsanya Daniel
InfraDeFi

SettlX

SettlX is a Web3 payment platform for global merchants in volatile markets like Nigeria. It lets them accept USDC and receive instant NGN settlements at a locked rate, eliminating FX risk completely.

Tech StackNext, Web3, Rust, Node
Builder
CChigozie Jacob
DeFi

compose.market

compose.market is a drag&drop builder to launch monetized, composable agents & workflows with infinite memory - powered by payable APIs (x402), globally reachable by humans & agents alike.

Tech StackSolidity, React, IPFS, MongoDB, Thirdweb, Mem0, Temporal, Hugging Face
Builder
AAlex P.
AIDeFi

Cryptoun

Turn USDC into PDF coupons anyone can redeem onchain — powered by Arbitrum

Tech StackNext, Web3, Ethers, Solidity
Builder
RRomario Kavin
DeFiSocialFi

Formicarium

Formicarium is a decentralized platform where an AI agent coordinates a fleet of autonomous machines and robots to manufacture customized products.

Tech StackWeb3, Python, Solidity
Builder
LLuka Levac
AIOther

aiSports - NBA Daily Fantasy

Web3 fantasy sports that feel like Web2 - stablecoin contests paid out onchain. Live on Arbitrum sepolia - contests running everyday. Fast & Friendly UX, and transparent payouts.

Tech StackReact, Solidity, Web3, Ethers, Node, Next
Builder
CChristopher Carnicle
NFTGamingDeFiAI

Fortuna Square

Fortuna Square is a live NFT marketplace and social platform on ApeChain that replaces traditional contract escrow with ERC‑6551 token‑bound accounts and ERC‑4907 rentals, so users keep control of their assets while bundling, renting, and trading them. It combines social identities, and group treasuries to let collectors, traders, and communities transact safely and collaboratively today, and is already deployed to Robinhood Chain testnet to become the social exchange layer for future tokenized stocks and other RWAs.

Tech StackSolidity, Web3, Next, React, Ethers, Node
Builder
ZZara Channer
DeFiSocialFiNFT

compose.market

compose.market is a drag&drop builder to launch monetized, composable agents & workflows with infinite memory - powered by payable APIs (x402), globally reachable by humans & agents alike.

Tech StackSolidity, React, IPFS, MongoDB, Thirdweb, Mem0, Temporal, Hugging Face
Builder
AAlex
AIDeFi

Cryptoun

Turn USDC into PDF coupons anyone can redeem onchain — powered by Arbitrum

Tech StackNext, Web3, Ethers, Solidity, circle dev wallet, Circle CCTP
Builder
SSai Ram
DeFiSocialFi

TransPaY

Making cross-chain payments as simple as Web2 payments.

Tech StackSolidity, Ethers, Web3, Next
Builder
RRahul Rathore
DeFiInfra
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Builder Highlight

Most Hackathon Won

Most Project Built

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
M

Manjeet Sharma

india
Champion
16
No.1
R

Rick

California
Champion
16
No.2
D

DHRUV PANCHOLI

jaipur
Champion
15
No.3