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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

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 Hackathon Won

Most Project Built

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

Aaditya Rawat

Champion
29
No.1
S

Skia Variants

The Blockchain
Champion
14
No.2
A

Akan

Lagos, Nigeria.
Champion
14
No.3

Debit Llama - Crypto Subscriptions

Direct Debit payment infrastructure using account abstractions, zero-knowledge proofs and Intent Solvers. Autonomous Agentic interaction supported using MCP server.

Tech StackEthers, Web3, Solidity, React, Deno, Circom, PostgreSQL
Builder
PPeter Horvath
DeFiInfra

Amen Protocol

The after-hours venue for Robinhood Stock Tokens. Trade the overnight gap or earn by carrying the weekend, settled on Chainlink. Live on Robinhood Chain.

Tech StackSolidity, React, Next, Web3, Node
Builder
TTaiwo Adeyeye
DeFiRWAAI

Bloom

The wallet where dollars become assets and actions.

Tech StackRust, Solidity, Web3, Ethers, Node, React, Next
Builder
AAaditya Rawat
DeFiRWAAI

StockGuard

A drop-in Morpho oracle for Robinhood Chain stock tokens: the same price as the standard oracle on normal days, and no new loans when the price can't be trusted.

Tech StackSolidity, Web3, Node
Builder
SSnithik Sarangi
DeFiRWAInfra

Manda

Manda gives personal AI agents revocable payment authority from a human-owned smart account. Owner-set rules limit who they can pay, how much and how often; eligible network gas is sponsored.

Tech StackNode, Web3, JavaScript, viem, Vite
Builder
AAdeyinka Aderogba
AIInfra

KAY9

A free on-chain watchdog for Robinhood Chain: it scans new token launches for what a chart cannot show, and writes every score to an append-only registry on chain 4663.

Tech StackReact, Next, Node, Solidity, Web3, Foundry, viem, IPFS
Builder
KKAY9 Team
InfraDeFi

Latheon (UPDATED)

Open-source privacy protocol — same code, live on Ethereum, Arbitrum, and Robinhood Chain. Prove a transaction to one chosen auditor, without spending power. 27 automated tests, 0 failures.

Tech StackSolidity, Web3, Ethers, Node, circom
Builder
VVladimir Smirnov
InfraDeFi

Lexifi

Lexifi: compliance for Uniswap v4 pools. Each pool sets its own rules - jurisdiction, KYC level, trade size - enforced in the contract, so no frontend can bypass them. Live on Robinhood Chain (4663).

Tech StackSolidity, Web3, uniswapv4hook, RWA, Compliance, Robinhoodchain, Tokenzation, Stablecoins
Builder
GGomathi Thayumanasundaram
DeFiOtherRWAInfra

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

Regen Bazaar

NGOs turn verified real-world impact into tRWI tokens that anyone can fund in Paxos USDG. AI extracts, a transparent formula scores, EAS attests on-chain, and the NGO is paid in the same transaction.

Tech StackSolidity, Next, React, Node, Web3
Builder
PPaul Burg
RWAAIDeFi

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
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