Open House Archive

Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.

All Projects

By Project By Buildathon

Swag's Project

intro text

Tech StackSolidity, Rust

Builder

DeFiRWAAI

InvariantSnipe

Deterministic on-chain invariant oracle that turns DeFi invariant violations into verifiable receipts

Tech Stack

Builder

Strikal

Call the move. Pick a market, say it goes up, down, or just that it moves, and pay a few dollars. Capped loss with no collateral nor liquidations. Live on Arbitrum One and Robinhood.

Tech StackReact, Web3, Solidity

Builder

DeFi

ATNX copy

If you can share it, you can trade it. ATNX turns any screenshot into a market on its Virality Index, one number from search, news, video and social. The hackathon build puts those markets on chain as bounded UP/DOWN markets: no leverage, no liquidation, no house. Live on Robinhood Testnet.

Tech StackReact, Next, Web3, Solidity, Rust, Node, Foundry, Supabase

Builder

SocialFiDeFiAI

Gacha Galaxy

Certified value for graded cards on Robinhood Chain. Gacha Galaxy prices PSA-graded cards privately, publishes a price certificate onchain that anyone can check, and lets you borrow against the card at 50% loan to value. Same model as Stock Tokens, new asset.

Tech StackSolidity, Web3, Robinhood Chain, Arbitrum

Builder

DeFiRWAInfra

Sumplus Agoranomos

Evidence-bound AI billing settlement: verify the bill before money moves, enforce payment ceilings and spending approvals on Arbitrum.

Tech StackSolidity, Node, Web3

Builder

InfraAI

Iceburg One

Iceburg is a sealed-bid, uniform-price issuance protocol for real-world, security-token-style offerings

Tech StackReact, Ethers, Solidity, Node, Web3

Builder

DeFiDAORWA

Pool

Pool turns receivables-backed credit into programmable principal and income. A supplier delivers today but gets paid weeks later. Pool lets financiers borrow against an attested receivables portfolio, while investors fund the lending and choose how to hold their exposure.

Tech StackNext, Web3, React, Morpho, Pendle, Solidity, viem

Builder

DeFiRWA

T-BillFlow

T-BillFlow is an Arbitrum-native execution layer for autonomous AI agents managing tokenized Treasury/RWA positions. It combines cryptographically enforced agent mandates with on-chain RWA eligibility checks through an execution gate. Its core principle is “Authorization ≠ Eligibility”: an agent can have permission to act, but execution only proceeds when both the mandate and asset state satisfy protocol rules.

Tech StackSolidity, Java, Python, TypeScirpt, Shell

Builder

DeFiAIRWA

Ethbid

ETHBid is a discovery market on Arbitrum.

Tech StackReact, Solidity, Web3, ENS, Paxos, Arbitrum, Typescript, Ethers

Builder

DeFi

SuperView

Say what you believe about the world. Watch it play out. SuperView turns a one-sentence view into a researched basket of Robinhood Chain stock tokens, then keeps score against the S&P 500 in public.

Tech StackNext, Web3, Node, Ethers, Solidity, React

Builder

DeFiAIInfra

Airbag

Parametric stablecoin cover on Arbitrum. If USDG depegs, a keeper fires the payout and USDG lands in the holder's wallet automatically, with no claim form. Underwriters back it via 1inch Aqua.

Tech StackSolidity, Next

Builder

DeFi

Learn

Explore Course

Build

Hack

Hack Coming Soon

Builder Highlight

Most Buildathon Won

E

Edy Cu

Jakarta

1

No.1

c

chubbyzroxas

1

No.2

Y

Yayan Fauzi

1

No.3

Most Project Built

z

zorzalcripto

regencia

61

No.1

A

Amaan Sayyad

Navi Mumbai, India

34

No.2

A

Aaditya Rawat

29

No.3

Builder Highlight

Most Hackathon Won

Most Project Built

Builder Highlight

Most Buildathon Won

E

Edy Cu

Jakarta

1

No.1

c

chubbyzroxas

1

No.2

Y

Yayan Fauzi

1

No.3

Most Project Built

z

zorzalcripto

regencia

61

No.1

A

Amaan Sayyad

Navi Mumbai, India

34

No.2

A

Aaditya Rawat

29

No.3

Project Highlight

EduBricks

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

x

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

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.

x

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

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

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.

x

Arbitrum Open House India: Online Buildathon

Project Highlight

EduBricks

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

x

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

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.

x

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

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

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.

x

Arbitrum Open House India: Online Buildathon

Swag's Project

intro text

Tech StackSolidity, Rust

Builder

DeFiRWAAI

InvariantSnipe

Deterministic on-chain invariant oracle that turns DeFi invariant violations into verifiable receipts

Tech Stack

Builder

Strikal

Call the move. Pick a market, say it goes up, down, or just that it moves, and pay a few dollars. Capped loss with no collateral nor liquidations. Live on Arbitrum One and Robinhood.

Tech StackReact, Web3, Solidity

Builder

DeFi

ATNX copy

If you can share it, you can trade it. ATNX turns any screenshot into a market on its Virality Index, one number from search, news, video and social. The hackathon build puts those markets on chain as bounded UP/DOWN markets: no leverage, no liquidation, no house. Live on Robinhood Testnet.

Tech StackReact, Next, Web3, Solidity, Rust, Node, Foundry, Supabase

Builder

SocialFiDeFiAI

Gacha Galaxy

Certified value for graded cards on Robinhood Chain. Gacha Galaxy prices PSA-graded cards privately, publishes a price certificate onchain that anyone can check, and lets you borrow against the card at 50% loan to value. Same model as Stock Tokens, new asset.

Tech StackSolidity, Web3, Robinhood Chain, Arbitrum

Builder

DeFiRWAInfra

Sumplus Agoranomos

Evidence-bound AI billing settlement: verify the bill before money moves, enforce payment ceilings and spending approvals on Arbitrum.

Tech StackSolidity, Node, Web3

Builder

InfraAI

Iceburg One

Iceburg is a sealed-bid, uniform-price issuance protocol for real-world, security-token-style offerings

Tech StackReact, Ethers, Solidity, Node, Web3

Builder

DeFiDAORWA

Pool

Pool turns receivables-backed credit into programmable principal and income. A supplier delivers today but gets paid weeks later. Pool lets financiers borrow against an attested receivables portfolio, while investors fund the lending and choose how to hold their exposure.

Tech StackNext, Web3, React, Morpho, Pendle, Solidity, viem

Builder

DeFiRWA

T-BillFlow

T-BillFlow is an Arbitrum-native execution layer for autonomous AI agents managing tokenized Treasury/RWA positions. It combines cryptographically enforced agent mandates with on-chain RWA eligibility checks through an execution gate. Its core principle is “Authorization ≠ Eligibility”: an agent can have permission to act, but execution only proceeds when both the mandate and asset state satisfy protocol rules.

Tech StackSolidity, Java, Python, TypeScirpt, Shell

Builder

DeFiAIRWA

Ethbid

ETHBid is a discovery market on Arbitrum.

Tech StackReact, Solidity, Web3, ENS, Paxos, Arbitrum, Typescript, Ethers

Builder

DeFi

SuperView

Say what you believe about the world. Watch it play out. SuperView turns a one-sentence view into a researched basket of Robinhood Chain stock tokens, then keeps score against the S&P 500 in public.

Tech StackNext, Web3, Node, Ethers, Solidity, React

Builder

DeFiAIInfra

Airbag

Parametric stablecoin cover on Arbitrum. If USDG depegs, a keeper fires the payout and USDG lands in the holder's wallet automatically, with no claim form. Underwriters back it via 1inch Aqua.

Tech StackSolidity, Next

Builder

DeFi