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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

Murmur

A public referee for AI market agents. Each agent seals its call onchain on Arbitrum before the market settles. Murmur reveals, scores and ranks every call in public, losses included.

Tech StackReact, Node, Solidity, Web3, TypeScript, Foundry, Fhenix CoFHE, x402
Builder
TTimileyin Daniel
AIDeFiInfra

StockScope

The 'Dexscreener' for Tokenized Stocks

Tech StackReact, Solidity, TypeScript, Next, TailwindCSS, Supabase, Firebase Auth, Node
Builder
Aalexcsl
DeFiRWAAI

SafeDeposit Zero

SafeDeposit Zero is an on-chain rental guarantee protocol that helps tenants rent without a large upfront security deposit while protecting landlords through a transparent, pooled guarantee system

Tech StackNext, Solidity
Builder
LLBRT
RWA

Agentleash

AI agents that hold money are one prompt injection away from losing it. AgentLeash lets an owner write spending rules in plain English (per-payment limit, daily limit, approved recipients, expiry) and enforces them on Arbitrum with a smart contract. The agent can't override the rules, and the owner has a kill switch. Demo: a prompt-injected agent tries to pay an attacker and the chain blocks it. 8 Foundry tests, deployed on Arbitrum Sepolia.

Tech StackSolidity, Ethers, Web3, Python
Builder
BBenjamin Hunpe
AIInfra

Peaje

Peaje makes any website or API ready for AI agents: discoverable, readable and, if you want, paid per request over HTTP 402, settled on Arbitrum and Robinhood Chain.

Tech StackSolidity, React, Next, Web3, Ethers
Builder
SSandra Carrillo
AIDeFi

Zap Pilot — Verifiable Strategy Calculator

Reproduce a portfolio exit rule on Arbitrum Sepolia: enter market inputs, inspect Vyper contract outputs, and verify the deployed runtime codehash against recorded Python backtest examples.

Tech StackReact, Next, Web3, Python
Builder
TTaiWei Chang
DeFi

Biz-Proof

Biz-Proof is a decentralized verification and credibility platform designed to bring transparent, verifiable proof of business operations onchain. By turning milestones, performance data, and client attestations into tamper-proof records, it enables emerging businesses to establish trust seamlessly with global partners and investors.

Tech StackSolidity
Builder
KKevin Efendy
RWA

Stock Hours Guard

One call before you touch a tokenized stock. guard.check(token, price, maxBps) returns Allow, Warn or Block with reasons: halts, oracle pauses, corporate actions, stale feeds, copycats, sequencer heal

Tech StackSolidity, Web3, Node
Builder
RRav3n
DeFiRWAInfra

Covenant

Non-custodial performance attestation for autonomous agents. Merkle-committed epochs, public challenge windows, USDG bonds. Live on Arbitrum Sepolia.

Tech StackRust, Web3, Python
Builder
RRenzo F
DeFiAI

A-Identity: pay check for agents on Robinhood Chain

Before an AI agent pays on Robinhood Chain: is it the real Paxos USDG, and does the money go to a registered agent? Answered live from the chain, with an x402 rail and on-chain spend limit behind it.

Tech StackReact, Next, Web3, Ethers, Node, Solidity, Rust
Builder
MMeriç Cintosun
DeFiInfraAI

Hodl

Trade RWAs and the tokens paired with them on Robinhood Chain. Find every Pons and Long token, see the RWA behind it, and buy in one tap with ETH or USDG. On phone and desktop.

Tech StackReact, Solidity, Next, Foundry, OpenZeppelin, Uniswap, TypeScript, Paxos USDG
Builder
HHawa
DeFiRWASocialFi

Supadex

Supadex is a private trading aggregator that gives users one account to access markets across venues - perps, prediction markets, options - while keeping their identity isolated behind the scenes.

Tech StackReact, Next, Web3, Rust, Solidity, Ethers, Node
Builder
NNaveen Sahu
DeFi
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