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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

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
z

zorzalcripto

regencia
Champion
51
No.1
z

zcy22606

chengdu
Champion
26
No.2
D

David Barasa

Kenya
Champion
19
No.3

Fhenix Escrow

Fhenix Escrow is a private escrow platform for Web3. Clients and developers agree on encrypted terms and milestones; both sign; the client funds escrow. Work is tracked by milestones, and payouts or refunds are enforced on-chain—without exposing amounts or details to the chain. We use Fhenix’s fully homomorphic encryption (FHE) so payment and milestone values stay encrypted on-chain while the contract still verifies and releases funds. Live on Arbitrum Sepolia https://fhenixescrow.netlify.app

Tech StackReact, Next, Web3, Ethers, Node, Solidity
Builder
JJunior Efik
DeFiOtherInfra

ArbiTrace

ArbiTrace is a focused debugging tool for Arbitrum developers that explains exactly why retryable transactions and Stylus/WASM contracts fail, with permanent onchain telemetry anchors.

Tech StackSolidity, Web3, Ethers, Python, Node, React, TypeScript, Foundry
Builder
PPaschal Anierobi
DeFiDAOSocialFiInfra

VERTEX

A capital-protection protocol built on Arbitrum. VERTEX uses math-based reserves to lock in a rising floor price, offering users a safer way to hold assets on-chain.

Tech StackWeb3, React, Next, Solidity
Builder
HHafiidh Luqmanul Hakim
DeFiOther

Prediction-Informed Router (Piro)

A Uniswap v4 hook that dynamically adjusts swap fees based on live prediction market signals. When the probability of an adverse ETH price event rises, the hook increases fees or blocks swaps entirely — protecting LPs and swappers in real time.

Tech StackReact, Solidity, Node, Ethers
Builder
FFred Gitonga
DeFiInfra

stylus-ide

Build, Test, AI Integrated and Deploy Smarter with "npm i create-stylus-ide". Create New Files or Load from GitHub or Interact with On-Chain Contracts.

Tech StackNext, Web3, Rust, Node
Builder
AAaditya Srivastava
InfraAI

Prediction-Informed Router (Piro)

A Uniswap v4 hook that dynamically adjusts swap fees based on live prediction market signals. When the probability of an adverse ETH price event rises, the hook increases fees or blocks swaps entirely — protecting LPs and swappers in real time.

Tech StackReact, Solidity, Node, Ethers
Builder
FFred Munene Gitonga
DeFiInfra

inkwell

Inkwell is a gas static analyzer and runtime gas profiler that generates ink reports, identifying "dry nib" and "gas spills" bugs. It provides the gas benchmarks required for stylus contracts for unoptimized stylus smart contracts.

Tech StackRust
Builder
CChinedu Nwadike
Infra

Reign Alter World

X-platform Survival MMORPG w/ unique gameplay-mechanics & “inGame DeFi” (various payment methods & Yield Farm) to be “Self-Sustaining” economic, allowing players to earn through Player Supply & Demand

Tech StackWeb3, Solidity, Unity3D, Firebase, Photon, Blender, GIMP, Audacity
Builder
GGregorius Bangkit Sukarma
GameFiGamingDeFi

VERTEX

A capital-protection protocol built on Arbitrum. VERTEX uses math-based reserves to lock in a rising floor price, offering users a safer way to hold assets on-chain.

Tech StackWeb3, React, Next, Solidity
Builder
HHafiidh Luqmanul Hakim
DeFiOther

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
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