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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

BPay

BPay is a decentralized protocol for bulk business payments, invoicing, and split-bill management - secure, instant, and multi-chain.

Tech StackNext, Ethers, Solidity, React, Web3
Builder
KKaushal Chaudhari
DeFi

plexi

Plexi is a composable ERC-4626 vault on Arbitrum that lets users deposit USDC and automatically gain exposure to yield strategies with real-time transparency. Instead of leaving capital idle or manually chasing yields, Plexi aggregates deposits, allocates them into a strategy, tracks TVL, shares, and hedge ratios on-chain, and provides a clean dashboard to monitor performance. The current MVP focuses on core vault mechanics—deposit, withdraw, and live stats—serving as the foundation for future integrations with protocols like GMX (GLP) and Hyperliquid for real yield and automated hedging.

Tech StackReact, Next, Web3, Ethers, Solidity, Node
Builder
HHarsh Sharma
DeFiRWADAO

Vesto

Vesto is a cross-chain yield aggregator that lets users deposit any token from any chain and automatically earn the best available yield. We handle swaps, bridging, and rebalancing so users stay in the highest APY vault — with one click.

Tech StackReact, Next, Web3, Ethers, Solidity, Node, express.js, hardhat
Builder
HHarsh Sharma
DeFiRWAAI

Smart-Cache Stylus

SmartCache is an automated caching-as-a-service system for Arbitrum Stylus contracts. It allows developers to optimize contract performance directly from their code, without needing to manually interact with the CacheManager through a GUI or CLI. Using a simple annotation such as #[auto_cache], developers can indicate which contracts or functions should be evaluated for caching. An off-chain service then handles the entire process: benchmarking gas usage, analyzing cost-efficiency, and submitting a bid through Arbitrum’s CacheManager if the caching decision is financially beneficial.

Tech StackNext, Web3, Ethers, Solidity, Rust, Python, Node
Builder
AAbhishek Dubey
Infra

TriggerXBuildathon

TriggerX is a decentralized automation protocol that enables smart contracts to execute tasks based on time, conditions, or external events in a fully automated and trustless manner. Built on EigenLayer’s Actively Validated Services (AVS), it provides shared security and decentralization to ensure reliable task execution across multiple blockchains.

Tech StackNext, Go, Solidity, Web3, Ethers
Builder
PPrapti Shah
DeFiInfra

Soma

SOMA is a blockchain-powered platform transforming cross-border transfers in Africa. Using offline-first USSD technology, it enables instant, low-cost transactions on any mobile phone.

Tech StackNext, Web3, Node, Solidity
Builder
IIteoluwakisi Bello
DeFi

ZapGift

ZapGift is a decentralized peer-to-peer micro-gifting platform on Arbitrum, enabling users to send ARB-based gifts with customizable messages stored on IPFS . It supports charitable donations also

Tech StackNext, Solidity
Builder
AAlfred Olumide Adenigba
DeFiNFTSocialFi

NeuroX

Name: NeuroX ㅤCategory: AI Integration + DeFi ExcellenceㅤTagline: "Smart contract auditing using neural networks in collaboration with staking for decentralized audits via manual auditing "

Tech StackNext, React, TypeScript, Tailwind CSS, Python, Node, Solidity, Ethers
Builder
AAkshat Pokhriyal
AIDAODeFi

QuikPay

QuikPay makes crypto payments instant, gasless, and as easy as scanning a QR code.

Tech StackSolidity, Next, React, Web3, Ethers
Builder
NNnenna Okoye
DeFi

Fylaro

Fylaro is a revolutionary invoice financing marketplace built on the principles of the Finternet, leveraging tokenization and the Unified Ledger to connect businesses seeking working capital with global investors.

Tech StackReact, Web3, Ethers, Solidity, Node, Tailwind CSS, Vite, Typescript
Builder
NNilesh Pathak
DeFiRWAOther

Safe WorkPay

SafeWorkPay is a freelancing platform for IT projects and coding tasks. It uses Blockchain and AI technology to make sure clients and freelancers have a secure and fair experience.

Tech StackReact, Web3, Ethers, Node, Solidity, Arbitrum One, AI Agent, Hardhat
Builder
RRahul Rathore
DeFi

dapps.co

Invest in communities like stocks (think reddit meets pump.fun)

Tech StackReact, Web3, Ethers, Node, Solidity, Python
Builder
MMohit Madan
SocialFiDAO
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