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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

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

Builder Highlight

Most Buildathon Won
s

songsu

Hong Kong
Champion
1
No.1
e

elpabl0.eth

Indonesia
Champion
1
No.2
c

contact ai

Champion
1
No.3
Most Project Built
z

zorzalcripto

regencia
Champion
55
No.1
R

Rick

California
Champion
44
No.2
A

Amaan Sayyad

Navi Mumbai, India
Champion
33
No.3

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
DeFiSocialFiNFT

DexL

SocialFi and Token launch platform

Tech StackReact, Next, Web3, Ethers, Node, Solidity, Rust
Builder
Kkasım yılmaz
SocialFiDeFiRWA

DexL

SocialFi and Token launch platform

Tech StackReact, Next, Web3, Ethers, Node, Solidity, Rust
Builder
VVentureVisionary
SocialFiDeFiRWA

ChainCraft

An AI multiplayer game builder and creator economy.

Tech StackReact, Web3, Next, Node, Solidity
Builder
EEric Wood
GamingAINFT

ERP Platform + WorkProof

WorkProof is a Web3-powered ERP module built on Arbitrum One that transforms professional credentials into verifiable on-chain assets. It enables talent to mint Soulbound Tokens (SBTs) as immutable proof of their work experience, monetize their profiles through paid access passes with automatic royalties, and execute freelance service contracts with full payment guarantees via on-chain escrow. Built with Rust, Vue 3, and Solidity, it connects talent, companies, and validators in a trustless ecosystem where reputation has real economic value.

Tech StackVue, Rust, Solidity, Web3, Ethers
Builder
Aalfredo gonzalez
DeFiSocialFiNFT

GainJar

GainJar is a decentralized payroll streaming protocol that transforms salary from a monthly event into a continuous, real-time stream on the blockchain. Employees earn second by second and

Tech StackNext, Solidity
Builder
Ssyafiqsan
DeFi

ArbiSecure

ArbiSecure: Trustless service escrows on Arbitrum Stylus. Secure, low-gas payment links for the global gig economy that ensure instant settlement and eliminate platform fees.

Tech StackRust, Next, Web3, Ethers, Node
Builder
AAl Hadad
DeFiOtherDAO

DKEY

a p2p marketplace for files

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

FlowForge

Personal AI DeFi agent: one place to design, deploy, and execute intelligent on-chain workflows through natural language.

Tech StackReact, Next, Web3, Ethers, Node, Solidity
Builder
00x5kyguy
DeFiAI

Impulse (Connect social causes with Crypto)

Impulse was born from a simple idea: anyone should be able to change the world with a single tap. Our mobile app connects people with social causes they care about and allows them to support those initiatives using crypto — instantly, transparently, and without intermediaries. Whether it's helping families, rescuing animals, protecting the environment, or improving local communities, Impulse gives everyone the power to take action and create real impact. Because small contributions, when combined, can transform entire communities.

Tech StackSolidity, Flutter, Firebase
Builder
JJulioce98
SocialFi

FLIBBER

Flibber is the world’s first scam-resistant DeFi ecosystem that fixes three massive pain points in decentralized finance: inefficient bridging, scam-heavy fiat on/off-ramps, and low-quality NFT floods

Tech StackReact, Web3, Solidity, Rust
Builder
XXBT
InfraDeFiAINFT

Payrium Wallet

Payrium is building a utility-first wallet with token-gated governance (DAO), designed for everyday users and long-term community ownership.

Tech StackWeb3, Solidity, React, Ethers, DAO backend, Voting, Encryption
Builder
PPetro Smahliuk
DeFiDAO
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