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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
M

Manjeet Sharma

india
Champion
16
No.1
R

Rick

California
Champion
16
No.2
D

DHRUV PANCHOLI

jaipur
Champion
15
No.3

Cadence

Subscription infrastructure built on Arbitrum that enables autonomous recurring payments in USDC.

Tech StackReact, Ethers, Node, Solidity
Builder
MMuhammed Musa
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

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

vacuum

Arbitrum-native execution layer and superapp: swap (Uniswap V3), ERC-4626 vaults, strategy NFTs, DAO automation, non-custodial agents, and an optional private RPC with MEV protection. Fully permission

Tech StackWeb3, Ethers, Solidity, Next, Compact, React, Go
Builder
HHarsh Sharma
InfraDeFiRWADAO

ArbShield

Privacy-Preserving Compliance Verification Engine for Institutional Real-World Assets (RWAs) on Arbitrum

Tech StackStylus, Next, Web3, Ethers, Node, Solidity, React, Rust
Builder
AAaditya Rawat
RWADeFiInfra

ArbShield

Privacy-Preserving Compliance Verification Engine for Institutional Real-World Assets (RWAs) on Arbitrum

Tech StackStylus, Next, Web3, Ethers, Node, Solidity, React, Rust
Builder
AAaditya Rawat
RWADeFiInfra

HoodGap

HoodGap is a 24/7 portfolio insurance for the weekend gap. We protect your stock positions against the volatility that happens while the market is closed. Buy a policy before Friday's close, set your risk threshold, and if the stock gaps down on Monday, you get an instant 100% binary payout. No claims, no waitin, just automated peace of mind.

Tech StackReact, Next, Web3, Solidity, Python, Rust, Node, Ethers
Builder
TTimileyin Olufisoye
DeFiRWANFT

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
CColeman Irby
AIInfraDeFi

robinbulk

bulksent for robin testnet

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