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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

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 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

valve

Valve gives users absolute control over digital subscriptions. Web2 companies use predatory "pull" billing, making cancellation a nightmare. Valve flips this dynamic using Arbitrum’s ultra-low fees, allowing users to push linear funds and instantly cut off service access with a single tap.

Tech StackReact, Solidity, Node, Web3, Ethers, Next, arbitrum, blockchain
Builder
OOgunode marvellous
DeFiSocialFiOther

Metagauge

AI-powered blockchain analytics and financial intelligence for Web3 teams. Tracks users onchain behaviour and contracts spendings as connected to traction gained during a campaign or marketing window.

Tech StackSolidity, React, Next, Web3, Node, Ethers, RPC, Wagmi
Builder
MMeta Gauge
DeFiAIInfraOther

Bursar

Bursar is an onchain treasury and policy layer for AI agents. Set per-payment and daily limits, approve the big spends, and see every payment, with a reason, on-chain. Built on Arbitrum

Tech StackReact, Web3, Solidity, Node, TypeScript, Foundry, viem, Vite
Builder
OOnanuga Emmanuel
InfraAIDeFi

Setlo

Shared event booking and USDG settlement for agencies, with supplier deposits released only when every required supplier accepts

Tech StackReact, Next, Node, Solidity, TypeScript , Viem, Supabase, Privy
Builder
TTomiwa Adepoju
InfraOtherDeFi

POP

AMM Prediction Market.

Tech StackPython, Solidity, Node, Java
Builder
JJade_001
DeFiInfra

NEXORA

Onchain task escrow for AI agents, connecting task creation, policy commitments, agent execution, independent verification, and conditional ETH settlement on Arbitrum.

Tech StackWeb3, Python, Solidity
Builder
ГГеорги Владимиров
AI

Quaestor

Quaestor gives an AI agent an allowance, not a wallet: a contract per agent on Robinhood Chain holds the owner's USDG and every share it buys, and reverts any trade over the owner's caps, limit price or Chainlink margin, even when the agent has been hijacked.

Tech StackSolidity, Ethers, Web3, React, Node
Builder
NN DIVIJ
AIDeFi

AgentRelay

A task delegation marketplace for AI agents on Arbitrum. Agents escrow USDC bounties for work they can't do themselves; a Stylus Rust contract verifies proof of completion before payout.

Tech StackReact, Web3, Rust, Solidity, Node
Builder
SSolocreative
AIDeFiInfra

DUREQO

Financial continuity infrastructure that keeps pre-authorized critical obligations executable when a treasury controller becomes unavailable, without creating a new master key.

Tech StackReact, Web3, Next, Solidity, TypeScript, Foundry, Wagmi, Viem
Builder
AAlexander
DeFiInfra

CLEAR-GAS

Pay gas in Paxos USDG when you have zero native ETH. An autonomous on-chain gas clearinghouse for Robinhood Chain with Arbitrum Stylus Rust/WASM preflight for a 20x fee reduction.

Tech StackSolidity, Python, Node, Ethers, Web3, Rust
Builder
MMr Sage
RWAInfraDeFi

Nokturn

Batch settlement for tokenized stocks on Robinhood Chain, built for the 74% of trades that happen while NYSE is closed. One clearing price, and a verifiable venue baseline on every fill.

Tech StackSolidity, Next, React, Node, Rust, Web3
Builder
WWangsit Nursyahada
DeFiRWAInfra

BellGuard

BellGuard protects tokenized-stock borrowers from unfair off-hours liquidations using price-confidence scoring, cure periods, reserve repayment, and partial liquidation on Robinhood Chain.

Tech StackSolidity, Python, Rust
Builder
TTioluwaleyi
DeFiAI
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