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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 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

Heimdall

Heimdall guards Arbitrum depositors in the exit race. When a vault starts draining, liquidity runs out fast. It spots early exploit signs, pays a priority tip, takes partial exits as liquidity allows, and retries. Its keeper can only send funds to your own wallet.

Tech StackGo, Solidity, Sveltekit
Builder
RRehoboth Okoibu
DeFi

Lendora

Lendora is stock lending on Robinhood Chain, built on unmodified Morpho Blue and Morpho Vault V2. Robinhood Chain has tokenized US stocks and ETFs, but you can't borrow them. Holders earn nothing, traders can't short or hedge onchain, and price feeds freeze when US markets close. That makes weekend lending against a stale price unsafe. Lendora lists one Morpho Blue market per stock, with the Stock Token as the loan asset. - Lenders deposit stocks into a Morpho Vault V2 and earn the interest borrowers pay. - Borrowers post USDG collateral and borrow the stock to short, hedge or arbitrage. - A closure-aware oracle adds a volatility-scaled buffer before market closes and earnings windows. Positions opened on Friday are sized for Monday's gap. - A router bundles each flow into one transaction. It gates new positions behind compliance attestations and risk caps, and exits are always free. - A fallback liquidator and a fee split fund a backstop reserve. - Live short-interest data per stock is published through an onchain lens and a public API. Stock lending is the plumbing that pays holders, enables shorting and keeps prices honest. Lendora brings it onchain.

Tech StackWeb3, Solidity, Defi
Builder
SSamya Deb
DeFi

TOM

A Web and Telegram trading terminal for Robinhood Chain, with pre-trade checks, session permissions and execution records. Mainnet core in founder testing; public interfaces are prototypes.

Tech StackWeb3, MCP, PostgreSQL, 0x, TypeScript, React, Viem, Node
Builder
ААдил Жигеров
DeFiInfra

kani-stylus

Bounded model checking for Stylus. Write symbolic tests for formal verification of your Stylus contracts.

Tech StackRust, Stylus, Kani
Builder
LLadislav Dubravský
InfraOther

Sherwood Forest

A game world shaped by onchain activity

Tech StackSolidity, Ethers, Node, Godot / GDScript, Scaffold-ETH 2, Firebase / Firestore
Builder
AAdrian Caso
Gaming

sekud beat.

sekud beat. is a browser-based Web3 rhythm game featuring an evolving AI anime companion. Enjoy frictionless Google login, play hit music, and unlock true asset ownership via an invisible Web3 backend.

Tech StackNode, Solidity, TypeScript, Anthropic API, JSON, Vite 6, Vitest 3
Builder
SSekud Beat
GamingAINFT

Robinfans — Decentralized Streaming with Per-Second Payments

Creators publish videos for free. Viewers pay per second they watch — directly through MetaMask.

Tech StackWeb3, Ethers, Solidity
Builder
GGreg Alex
SocialFi

Perch

The launchpad for stock culture on Robinhood Chain. Launch a coin paired with TSLA, AMZN or USDG. Trading fees pay creators, reward holders and build permanent liquidity.

Tech StackReact, Next, Web3, Node, Solidity, Foundry, Ponder, Uniswap V4
Builder
PPerch
DeFiNFTInfraRWA

CopyPools

CopyPools helps liquidity providers copy Uniswap V3/V4 strategies, manage positions and automate fee compounding, range adjustments and exits on Arbitrum.

Tech StackWeb3, Solidity
Builder
PPrabal Pratap Singh
DeFi

AfterHours Oracle

A 24/7 price oracle for tokenized stocks on Robinhood Chain, live on mainnet: Chainlink while the market is open, the on-chain pool, bounded, while it is closed.

Tech StackRust, Python, Arbitrum Stylus, Robinhood Chain, Chainlink, Uniswap v3, Morpho Blue, USDG
Builder
BBongbongcrypto
DeFiRWAInfra

PULSE on Robinhood

AI-powered onchain market intelligence, wallet trading and autonomous trading agents with pay-per-use x402 services on Robinhood.

Tech StackNext, Solidity, TypeScript, Ethers, React, Web3
Builder
Hhealth_coach
RWAAIDeFi

Ad Exchange on Blockchain — Decentralized Attention Marketplace

Advertisers pay viewers per second of watched content, using streaming payments and dynamic tier-based rates on Robinhood Chain.

Tech StackEthers, Web3, Solidity
Builder
GGreg Alex
SocialFi
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