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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
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
A

Akan

Lagos, Nigeria.
Champion
14
No.1
S

Skia Variants

The Blockchain
Champion
13
No.2
H

Hafiidh Luqmanul Hakim

Indonesia
Champion
7
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

Prisms

As TCG collectors ourselves, we’re building Prisms to gamify Pokémon TCG collecting.

Tech StackNode, Next, Solidity
Builder
WWen Kai Lau
Gaming

Truvial

Milestone-gated disaster relief & donation protocol powered by Arbitrum Stylus (Rust WASM). Transparent fund releases enforced through verifiable on-chain audits.

Tech StackReact, Next, Web3, Node, Rust, Arbitrum, Arbitrum Stylus, WASM
Builder
DDrishyam Debnath
DeFiDAOInfraSocialFi

Latheon

Open-source privacy protocol on Ethereum. Prove a transaction happened to one chosen auditor — without giving them spending power. Independently verifiable. 27 automated tests, 0 failures.

Tech StackSolidity, Web3, Ethers, Node, circom
Builder
VVladimir Smirnov
InfraDeFi

RedCarpetHQ

RedCarpetHQ is a regulated RWA marketplace that turns film profit participation rights into liquid, tradeable securities. Producers tokenize future film revenue through SPV structures and raise capital at 0% platform fee. Investors buy in, trade peer-to-peer on an order-book market, and borrow against their holdings through ERC-4626 lending vaults. We capture 2.5% on every secondary trade. The protocol is built ground-up for agentic trading: no AMM, no matching engine. Bots read the order book and execute trades themselves. We ship a Claude MCP server so any AI agent can trade, lend, and manage positions through natural language, plus an agentic powered market making system that runs trading strategies autonomously. Our lending vaults run on USDG on Robinhood Chain. USDG depositors supply liquidity and earn yield from borrower interest, paid at dynamic rates set by our RiskOracle.

Tech StackNext, Solidity, Node, Web3
Builder
EElvin Li
DeFiAIRWA

RWA Guard

One call returns eight named blocking conditions as reason bits, plus an unreadable bit. A stateless, deny-by-default view contract for tokenised real-world assets on Arbitrum and Robinhood Chain.

Tech StackSolidity
Builder
BBin Liang
InfraRWADeFi

Parity

Risk intelligence for Robinhood Stock Tokens. Parity monitors on-chain prices against reference values and detects abnormal, persistent deviations using historical baselines.

Tech StackWeb3, Node, Ethers
Builder
BBrian Ramos
RWADeFiInfra

Crosssign

CrossSign is a trustless cross-wallet verification layer that proves a user's wallet ownership through live cryptographic signatures and anchors verifications onchain.

Tech StackReact, Next, Web3, Ethers, Javascript, Rust, Node
Builder
OOluwatimilehin Sotonwa
AI

Roundtrip

Roundtrip measures whether tokenized stocks on Robinhood Chain can actually be sold, and makes every number recomputable. At a pinned block, it buys with USDG and sells the whole position back throug

Tech StackWeb3, Python, Solidity
Builder
Ddiggler dirk
DeFiRWAInfra

Gage.cash

Cash against your stocks and memes. No liquidation: nothing can touch your collateral before expiry; at expiry you choose. Live on Robinhood Chain mainnet.

Tech StackSolidity, Next, React, Python, Node, Foundry, Typescript, view/wagmi
Builder
BBassem Boulfarkat
RWADeFi

Baraza Protocal

Reputation-weighted, on-chain arbitration for chamas, ROSCAs, and informal trade partnerships piloted in East Africa, built on Arbitrum with Stylus (Rust) jury selection.

Tech StackReact, Node, Web3, Ethers, Solidity, Rust
Builder
JJames Wasonga
SocialFiDeFiInfra

ETour - On-Chain Tournament Protocol

Game-agnostic 100% on-chain tournament framework live on Arbitrum One.

Tech StackSolidity, React
Builder
KKarim Chukfeh
Gaming

BotHire

Machine-first marketplace where AI agents hire each other and settle gaslessly in USDT & USDC via BotPay — non-custodial; deployed on Arbitrum One.

Tech StackSolidity
Builder
YYong He
AI
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