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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

Project Highlight

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

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

Kamui Capital Frontier

Read-only capital-buffer checks for proposed Safe transaction batches on Arbitrum Sepolia. Stops at the first unfunded or unknown call. Synthetic onchain demo; no transaction execution.

Tech StackSolidity, Ethers, Node
Builder
DDongseok Lee
Infra

ProtoRWA

ProtoRWA: a hardware-RWA funding platform on Robinhood Chain (USDG-settled). It fixes trust in early-stage hardware raises, backers fund via milestone escrow released only on on-chain

Tech StackNext, Web3, Rust, Solidity, Typescript
Builder
OOlisaemeka Morah
RWA

Stagepay

Milestone escrow for freelance work in USDG or USDC on Arbitrum. The client funds the whole job up front; silence past the review window pays the freelancer. No platform, no owner key, no fee.

Tech StackSolidity, Web3
Builder
DDongsuk Yang
DeFiOther

Cadence

Cadence Protocol is a decentralized estate planning and inheritance engine built to secure family wealth on-chain. 1. Trustless Execution: Uses Proof-of-Life heartbeats and 2-of-3 guardian consensus to trigger inheritance without probate courts or intermediaries. 2. Autonomous Yield Streams: Locks and distributes assets via automated vesting schedules, earning real lending interest (Aave v3 & USDG) on unvested capital. 3. Privacy-First: Allocations remain client-side encrypted until inheritance conditions are cryptographically met.

Tech StackSolidity, Rust, Next, React, Node, Web3, TypeScript, Foundry
Builder
DDAVID FADOJU
RWADeFiInfra

CorpShift

CorpShift keeps DeFi safe when stock tokens change. It normalizes and attests corporate actions, verifies onchain multipliers, and gives protocols policy gates and economic-unit accounting.

Tech StackReact, Node, Web3, Solidity
Builder
VVu Tang
DeFiRWAInfra

TRAIDE Agents with Receipts

Autonomous AI agents trading TRAIDE's V2 DEX on Arbitrum Sepolia. Every decision is a hash-chained receipt anchored on Arbitrum and Robinhood Chain, verifiable by anyone with one command.

Tech StackPython, Solidity, Web3
Builder
RRyan Hammer
DeFiAI

BoringDeFi

Non-custodial USDC vault on Arbitrum. Spreads deposits across Aave, Fluid, Compound and Morpho, and refuses on-chain to put money anywhere it couldn't get back today.

Tech StackWeb3, Solidity, Ethers, Python
Builder
DDainius Zino
DeFi

Sherwood

Programmable downside protection for tokenized stocks on Robinhood Chain. Choose your floor, pay a fixed premium, and keep the upside while your downside is protected.

Tech StackSolidity, React, Next, Web3
Builder
MManass Kusko
RWADeFiInfra

RentalRide

Verifiable car rental search powered by Arbitrum Stylus — ranking 100+ vehicles by 7 weighted criteria on-chain.

Tech StackWeb3, Solidity, Rust, Java, Stylus
Builder
GGreg Alex
RWA

Gapguard

A Uniswap v4 hook that prices the hours the stock market is closed, so LPs on tokenized stocks get paid for the weekend gap.

Tech StackSolidity, Web3
Builder
DDavid Corey
DeFiRWAInfra

InvoiceFence

One obligation. One payment. Human-approved invoice settlement shared by independent executors, with verified Arbitrum-chain testnet payment and duplicate rejection.

Tech StackReact, Ethers, Node, Solidity
Builder
LLee Long
Infra

batpilot

Your US stocks, managed while you sleep

Tech StackReact, Web3, Node, Solidity, Rust
Builder
MMưa Phi Bảo Trần
RWADeFi
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