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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
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
A

Aaditya Rawat

Champion
29
No.1
A

Akan

Lagos, Nigeria.
Champion
14
No.2
S

Skia Variants

The Blockchain
Champion
13
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

Tozlow

A simple, elegant app that turns casual plans into real commitments (penalizes friends who flake on agreed-upon meetups with USDC).

Tech StackRust, Stylus, Wagmi, Next
Builder
BBrayan Roberto Ccarita Cruz
DAOSocialFiInfra

DKEY

a p2p marketplace for files

Tech StackSolidity, Node, viem, Web3, Ethers, IPFS
Builder
Nnoad dev
DeFiSocialFiOther

Tozlow

This is Tozlow: a simple, elegant app that turns casual plans into real commitments (penalizes friends who flake on agreed-upon meetups with USDC). Built for groups, powered by blockchain, designed for humans.

Tech StackNext, Rust, Stylus, Wagmi
Builder
Aarroz
DAOSocialFiInfra

Fangorn

A Programmable Data Commerce Layer for the Agentic Web.

Tech StackRust, Solidity, Web3, Node, Subgraph, LangChain, Typescript, x402
Builder
TTony Riemer
AIInfraDeFi

robinbulk

bulksent for robin testnet

Tech StackWeb3, Node, Solidity, Python
Builder
Eemad zaxo
DeFiOtherInfra

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
MMartins Jojolola
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
SSAIRAM M R
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
NNejc Rožman
AIOther
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