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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

tahansoe

A non-custodial agent that saves your DeFi loans from liquidation

Tech StackNext, Web3, Node, Solidity
Builder
RRakyavara Artomily
DeFiAI

PREDGE

A verification and settlement layer for agent payments. Predge signs outcome claims with ed25519 so a counterparty can verify them offline, and arbitrates disputes against a slashable bond.

Tech StackSolidity, Node, Ethers, Web3
Builder
PPREDGE
AIInfraDeFi

logwitness

A debugging tool that checks historical Arbitrum event responses against receipt evidence and produces reports other developers can verify offline and recheck later.

Tech StackNode, Web3, Solidity, Ethers
Builder
DDapps Over Apps
Infra

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
Yyangdongsuk
DeFiOther

Juiced

Onchain leverage on Robinhood Chain that buys the real token via p2p credit vs. synthetic exposure. Juiced is protocol aligned leverage: Leveraged demand is capture by launchpads and token issuers.

Tech StackSolidity
Builder
CCan Kisagun
DeFi

CortexRails Protocol

Liquidations shouldn't be a guess. CortexRails is an onchain policy layer returning deterministic ALLOW, LIMIT, REVIEW, or BLOCK decisions for financial actions before execution.

Tech StackWeb3, Next, Ethers, Rust, Solidity
Builder
AAnjola Adeyemi
RWAAIDeFiInfra

VeraKey

One passkey. Unlinkable on-chain identities. Every app gets its own USDG account and ID on Arbitrum; each approval is a ZK proof made in the browser, so nothing on-chain links them.

Tech StackReact, Node, Solidity, Rust, Noir, Arbitrum Stylus, Zero-Knowledge, WebAuthn
Builder
NNN Vera
InfraDeFi

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
David 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
VVũ Tăng
DeFiRWAInfra

Creator Foundry

Escrow that makes silence unprofitable — USDG bounty escrow, on-chain revenue splits and an AI critic for creators. Live on Robinhood Chain Testnet + Arbitrum

Tech StackNext, React, Web3, Solidity, Node, Python, TypeScript, wagmi
Builder
VVISHNURAJ
NFTDeFiAISocialFi

Sandia

Sandia brings payments, transfers, DeFi yield, and tokenized stocks into one simple app built around USDG on Robinhood Chain.

Tech StackReact, Next, Web3, Vyper, Node, Wagmi, Viem, Privy
Builder
RRafael Abuawad Vivanco
DeFiAIRWA

Baskt

Social Launchpad for indices on Robinhood Chain.

Tech StackNext, Solidity, React, Node, Foundry, Viem, Typescript, Ponder
Builder
Aalberto galan
DeFiSocialFi
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