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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
s

songsu

Hong Kong
Champion
1
No.1
e

elpabl0.eth

Indonesia
Champion
1
No.2
c

contact ai

Champion
1
No.3
Most Project Built
z

zorzalcripto

regencia
Champion
59
No.1
R

Rick

California
Champion
44
No.2
A

Amaan Sayyad

Navi Mumbai, India
Champion
33
No.3

Project Highlight

Project Highlight

EduBricks

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

Champion

7th Place

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

Champion

1st Place

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

First Prize

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

Champion

Third Prize

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

Second prize

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

Honorable Surprise Mention

Arbitrum Open House India: Online Buildathon

Alienzone

DeFi Native Anime Franchise

Tech StackReact, Next, Solidity
Builder
YYoann YOUKPO
GamingDeFiSocialFi

Twyne

Twyne is a credit-delegation layer built on top of existing lending markets. It lets users double down on what they already do: passive lenders put their unused borrowing capacity to work for extra yield, while borrowers rent that capacity for a small fee

Tech StackSolidity, Python, Web3, React, Next
Builder
TTaulant Kryeziu
DeFiInfra

OTTO

Infra for launching AI DAOs

Tech StackWeb3, React, Node, Solidity, Ethers
Builder
VVladimir Prosvirkin
DAOAI

Cognivern

Cognivern is a spend-governance control plane for AI agent wallets. Every spend is policy-checked before signing—approved, held, or denied based on budget, vendor, chain, and risk—with FHE-encrypted on-chain budgets keeping limits private. A Gemini 3.1 agent runtime follows a PLAN → EVIDENCE → PREVIEW → CONFIRM → EXECUTE → AUDIT workflow with human approval before spending. Deployed on Arbitrum Sepolia and Robinhood Chain Testnet with Hyperlane cross-chain execution and audit evidence anchored to Filecoin and 0G.

Tech StackReact, Next, Web3, Ethers, Solidity, Node
Builder
Uudi ngethe
AIInfra

Sentidex

Sentidex is a dapp for perpetual attention markets: live tradable prices on who holds attention in crypto and culture.

Tech StackReact, Next, Solidity, Ethers
Builder
RRichard Robertson
SocialFiDeFi

GREEK

Greek is a complete tokenized Options system that allows anyone to create options and markets around any tokenized asset in a capital efficient manner.

Tech StackReact, Solidity, Next, Web3, Node
Builder
MMahmoud Lababidi
DeFiInfra

Centok

The simplest way to access stocks with fewer bureaucratic barriers and a more tax-efficient path to global investing.

Tech StackReact, Next, Web3, Node, Solidity, NestJs, Prisma
Builder
SSamuel Schramm Meurer
Other

BeyondPlay AI

Tiktok for onchain gaming, Powered by AI

Tech StackNext, React, Node
Builder
SSrini Anala
GamingAISocialFi

AlphaGrid - Prop trading arena for autonomous agents

AlphaGrid is a decentralized prop trading protocol where autonomous AI financial agents compete for capital under transparent onchain risk rules, while trading tokenized stocks on Robinhood Chain.

Tech StackMCP/API, 4. ERC-4626 Vaults, AI Agents, Prop Trading, Onchain Reputation
Builder
VVojtech Rychnovsky
AIDeFi

AlphaEngine

Confidential Alpha Network for On-Chain Finance

Tech StackNext, Solidity, Ethers, Web3, Node, React, Viem
Builder
KKumar Nilay
DeFiAIInfra

Capricorn - London Open House

A composable DEX with HFT-grade liquidity for RWA.

Tech StackReact, Python, Solidity, Node
Builder
KKevin Yin
DeFiRWA

Quay Markets

Oracle-based DEX where professional market makers quote tokenized stocks and blue-chip assets with CeFi-tight spreads.

Tech StackWeb3, Solidity, Go
Builder
DDawid Swiatowiec
DeFiInfraRWA
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