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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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Most Project Built

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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
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

Neosonic Private Cinema Interface

One of the best visuals and tools for managing your own folders. All your movies presented better than netflix. And hey... its 100% Free for wallet users.

Tech StackWeb3
Builder
AAlan Durier
Other

Voux

Voux solves the lack of professional documentation in Web3. It’s a signature-less platform that generates PDF invoices and reports for stablecoins, ETH, and NFTs. By using user-side tech, it provides secure, instant financial records for accounting without ever needing wallet signatures.

Tech StackWeb3, Java, Python, Node, Next, Ethers
Builder
FFilipe Camargo
DeFiNFTAI

Voux

Voux solves the lack of professional documentation in Web3. It’s a signature-less platform that generates PDF invoices and reports for stablecoins, ETH, and NFTs. By using user-side tech, it provides secure, instant financial records for accounting without ever needing wallet signatures.

Tech StackWeb3, Java, Python, Node, Next, Ethers
Builder
FFilipe Camargo (Waldo)
DeFiNFTAI

Saku

Numbers Over Addresses.

Tech StackSolidity, Next, Web3
Builder
RRiyan
DeFiInfraOther

MERGE PROTOCOL

The decentralized execution layer for Web3 gigs. Merge Protocol replaces middlemen with smart contract escrow on Arbitrum, UI-assisted GitHub PR verification, and encrypted XMTP wallet chat. (191 char

Tech StackNext, React, Solidity, Ethers, Node
Builder
AAyanfeoluwa Odule (ogayanfe)
Infra

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
UUfonabasi Efik
DeFiOtherInfra

ArbitPy

The first Python-to-blockchain compiler. Write familiar Python, compile to Solidity or Rust, deploy smart contracts instantly

Tech StackReact, Web3, Ethers, Python, Rust, Solidity, Node, Core
Builder
RROHAN KUMAR
InfraDeFiAI

ChainWard

ChainWard provides on-chain incident detection for Orbit. It records silent failures immutably, enabling auto-pausing bridges, enforced SLAs, and verifiable forensic proof of downtime.

Tech StackSolidity, Web3, Ethers, Node, Next, React
Builder
PPaschal Anierobi
InfraDeFiDAOOther

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
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