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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

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

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

Morbit

Non-custodial lending infrastructure for tokenized real-world assets, built on Robinhood Chain Testnet and Arbitrum.

Tech StackReact, Ethers, Solidity, Web3, Next
Builder
DDickson Kamasah
DeFiRWAInfra

Unice Protocol

Prediction market but everyone is winner.

Tech StackNext, Solidity
Builder
IInsizzaki Alfitra
DeFi

ArbiFlow Agentic Settlement

Agentic invoice escrow on Arbitrum with x402 payments, AP2-style mandates, ERC-8004-style reputation, TEE validation, service bonds, dispute evidence, and settlement receipts.

Tech StackReact, Next, Web3, Node, Solidity, Ethers
Builder
AAidar Khusaenov
AIDeFiInfra

contrarian

The AI Agent That Challenges Every Onchain Decision Before It Becomes a Transaction

Tech StackNext, React, Web3, Node, Solidity
Builder
RRakyavara Artomily
AI

Phylax SDK

Institutional-grade control layer for autonomous AI agents, ERC-4337 smart accounts, delegated session keys, and centralized gas sponsorship to enforce secure, bounded, and verifiable on-chain.

Tech StackWeb3, Ethers, Solidity, Pimlico, Viem, Permissionless, ERC-4337, Phylax SDK
Builder
BBagas Gunardi
AIOtherInfra

ArbiCycle

ArbiCycle is a trustless rotating savings circle (Ajo / Chama / Stokvel) on Arbitrum. 500M people worldwide save this way through one coordinator who can disappear with the pot — ArbiCycle replaces that coordinator with smart contracts. Chainlink VRF picks the payout order provably fairly, Chainlink Automation triggers rotations and penalties autonomously, and idle contributions earn yield on Aave v3. Defaulters are auto-kicked and their on-chain reputation drops. Live on Arbitrum Sepolia, deployable to Robinhood Chain. The tradition stays — the single point of failure goes

Tech StackReact, Solidity, Web3, Node
Builder
CChristian Paul
SocialFiDeFi

LowBid

Building a Lowest Unique Bid Auction platform on Arbitrum, where users compete strategically and the winner is the participant who places the lowest unique bid.

Tech StackSolidity, Next, Node, React, Web3, Ethers
Builder
CCaner Yakupoglu
DeFiRWASocialFiGaming

CoverFi

The world's first DeFi on-chain Credit Default Swap for RWA tokens.

Tech StackSolidity, Typescript, Javascript
Builder
MMike Nse
DeFiRWA

siri mirim4 copy

teste 4

Tech StackWeb3, Solidity, Go, Move
Builder
Zzorzalcripto cripto
DeFiDAOOther

Tessera

Tessera is a non-custodial lending protocol built for tokenized stocks.

Tech StackNext, Web3, Node, Rust, Solidity
Builder
RRitik Pandey
DeFiRWAAIInfra

Arbiguard

ArbiGuard is an autonomous risk firewall for tokenized-asset protocols. It scores live transactions on-chain in a Stylus risk engine, enforces protocol-signed risk policies, and trips a hysteresis circuit breaker the moment an exploit pattern crosses a blocking threshold — then writes the threat signature to a shared registry so every other protected pool is immunized against the same attack. Built for the capital coming to Arbitrum and Robinhood Chain, where a single exploit on tokenized equities is a regulatory event, not just a TVL loss.

Tech StackReact, Web3, Ethers, Solidity, Node
Builder
IIbrahim Abdulkarim
DeFiAI

RWA.Index

Autonomous AI-managed tokenized-stock index fund on Robinhood Chain. ERC-4626 vault with an LLM portfolio manager bounded by on-chain guardrails.

Tech StackReact, Next, Web3, Solidity, Node, TypeScript, viem, Foundry
Builder
YYehor Ivashchenko
RWADeFiAI
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