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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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Builder Highlight

Most Hackathon Won

Most Project Built

Builder Highlight

Most Buildathon Won
E

Edy Cu

Jakarta
Champion
1
No.1
c

chubbyzroxas

Champion
1
No.2
Y

Yayan Fauzi

Champion
1
No.3
Most Project Built
z

zorzalcripto

regencia
Champion
61
No.1
A

Amaan Sayyad

Navi Mumbai, India
Champion
34
No.2
A

Aaditya Rawat

Champion
29
No.3

Project Highlight

Project Highlight

EduBricks

EduBricks is a platform enabling fractional ownership of tokenized real estate, making investments more accessible

Champion

x

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

Champion

x

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

x

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

Champion

x

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

x

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

x

Arbitrum Open House India: Online Buildathon

Megamint

Megamint is the infrastructure layer for transparent community rewards, enabling creators and projects to run verifiable fully on-chain lotteries, giveaways, and engagement campaigns.

Tech StackReact, Ethers, Solidity, Web3
Builder
KKen Juniour
GamingNFT

Tollkit SMS

Pay-per-call SMS for AI agents. x402 V2 + AP2 mandates on Arbitrum. Buyers fund one Intent Mandate, agents send N transactional SMS off-chain, we batch-settle every 5 sends. Twilio toll-free verified, TCPA compliant. Part of tollkit.dev.

Tech StackEthers, Web3, Solidity, TypeScript, Foundry
Builder
UUltraStarz
AIInfraOther

FaucetDrops

An automated onchain reward distribution and engagement platform. It helps Web3 projects, DAOs, and communities run token drops, campaigns, quests, and user onboarding at scale

Tech StackNext, Web3, Ethers, Python, Solidity, React
Builder
JJeremiah Oyeniran Damilare
GamingInfra

UX Hub

UX Hub — AI-Powered UX Audit Infrastructure for Arbitrum Builders

Tech StackNext, Postgres, Strapi, Viem
Builder
VValeria Caracciolo
AIOtherInfra

vault pay

VaultPay is a PayPal-style crypto savings app built on Arbitrum Stylus. It helps users create named savings vaults, add funds over time, and withdraw based on transparent maturity and penalty rules enforced by a Rust smart contract.

Tech StackReact, Node, Rust, Next
Builder
BBernard K. karaba
DeFi

kura

KURA brings ROSCAs on-chain on Arbitrum. Communities save, coordinate capital, bid for liquidity, build reputation, and govern transparently while sensitive financial data remains confidential through

Tech StackEthers, Solidity, React, Web3
Builder
Nnoah
DeFiSocialFiDAORWA

ClashFi

Competitive AI arena on Arbitrum where autonomous agents stake real tokens to prove intellectual superiority.

Tech StackNext, Node, Solidity, React
Builder
AAndreas Nugroho
DeFiGamingAIInfra

Shielded (Dapp & Private wallet extension)

Private ERC-20 payments on Arbitrum. Deposit once, pay teams without exposing who paid whom or how much, withdraw when ready. ZK proofs in-browser and onchain verifier, live on Arbitrum Sepolia.

Tech StackEthers, Solidity, Next, Web3, privacy, zero knowledge
Builder
AAkinbola Kehinde
DeFiOtherInfra

INJCOPILOT

AI copilot that turns crypto intent into Injective onchain action plans with risk-aware review.

Tech StackReact, Rust, Web3
Builder
BBranham Kola
Other

Mandate

First ERC-8226 implementation: AI-managed tokenized equities on Robinhood Chain with atomic on-chain mandate enforcement, two-agent reasoning, correlation-aware risk, and examiner-ready compliance rec

Tech StackNext, Node, Solidity, Foundry
Builder
00xnidhii
DeFiAIRWA

ChainFlux

ChainFlux is a two layer platform built on Arbitrum Sepolia. The Attention Layer aggregates eight live Ethereum signals into a single score from 0 to 100, transforming raw blockchain data into interpreted signals anyone can understand. The Trading Layer lets traders act on those signals through perpetual markets on Gas price and transactions per block. Blockchain data has always been observable. ChainFlux makes it tradeable. Frontend: https://github.com/azebiri09/chainflux-insights

Tech StackReact, Ethers, Node, Solidity
Builder
GGospel
DeFiInfra

LEVER

LEVER is the derivatives layer for prediction markets. It builds on top of the leading prediction markets, letting traders go long or short with leverage on any listed outcome.

Tech StackWeb3, Ethers, Solidity, React, Next, Node
Builder
JJames Park
DeFiInfraOther
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