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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

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Project Highlight

EduBricks

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

Champion

7th Place

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

Champion

1st Place

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

First Prize

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

Champion

Third Prize

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

Second prize

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

Honorable Surprise Mention

Arbitrum Open House India: Online Buildathon

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
z

zorzalcripto

regencia
Champion
51
No.1
z

zcy22606

chengdu
Champion
26
No.2
D

David Barasa

Kenya
Champion
19
No.3

Fortuna Square

Fortuna Square is a live NFT marketplace and social platform on ApeChain that replaces traditional contract escrow with ERC‑6551 token‑bound accounts and ERC‑4907 rentals, so users keep control of their assets while bundling, renting, and trading them. It combines social identities, and group treasuries to let collectors, traders, and communities transact safely and collaboratively today, and is already deployed to Robinhood Chain testnet to become the social exchange layer for future tokenized stocks and other RWAs.

Tech StackSolidity, Web3, Next, React, Ethers, Node
Builder
ZZara Channer
DeFiSocialFiNFT

compose.market

compose.market is a drag&drop builder to launch monetized, composable agents & workflows with infinite memory - powered by payable APIs (x402), globally reachable by humans & agents alike.

Tech StackSolidity, React, IPFS, MongoDB, Thirdweb, Mem0, Temporal, Hugging Face
Builder
AAlex
AIDeFi

Cryptoun

Turn USDC into PDF coupons anyone can redeem onchain — powered by Arbitrum

Tech StackNext, Web3, Ethers, Solidity, circle dev wallet, Circle CCTP
Builder
SSai Ram
DeFiSocialFi

TransPaY

Making cross-chain payments as simple as Web2 payments.

Tech StackSolidity, Ethers, Web3, Next
Builder
RRahul Rathore
DeFiInfra

Minimax

Multi-DEX LP Battle Arena on Arbitrum where liquidity providers compete head-to-head in time-bound PvP matches.

Tech StackReact, Web3, Ethers, Solidity
Builder
CCapinho
DeFiGamingAI

Paxr

The decentralized, privacy-first ticketing platform that ends scalping and ticket fraud while giving fans real ownership and social features.

Tech StackReact, Web3, Ethers, Solidity
Builder
MMoses Sunday
SocialFiNFTRWA

TransPaY

Making cross-chain payments as simple as Web2 payments.

Tech StackSolidity, Ethers, Web3, Next
Builder
CCipher Hex
DeFiInfra

Nskills

Nskills is a Stylus-first visual workflow builder for the Arbitrum ecosystem. Built from our learnings training 800+ Stylus developers, it helps teams move from prototype to production by letting them compose apps on a canvas (contracts, Orbit integrations, agents, analytics, x402 pay rails, security/perf blocks) and generate a skills repo that Claude/Cursor can use to produce a clean codebase with full context—reducing chaos, improving verification readiness, and accelerating mainnet + Orbit deployments.

Tech StackRust
Builder
AAbhishek Dubey
SocialFiInfraAI

Nskills

Nskills is a Stylus-first visual workflow builder for the Arbitrum ecosystem. Built from our learnings training 800+ Stylus developers, it helps teams move from prototype to production by letting them compose apps on a canvas (contracts, Orbit integrations, agents, analytics, x402 pay rails, security/perf blocks) and generate a skills repo that Claude/Cursor can use to produce a clean codebase with full context—reducing chaos, improving verification readiness, and accelerating mainnet + Orbit deployments.

Tech StackRust
Builder
AAbhishek Dubey
SocialFiInfraAI

Maxxit-Openclaw

Autonomous trading agents that prove their performance with ZK proofs and sell alpha signals to other agents via micropayments — fully trustless, fully private.

Tech StackNext, Solidity, Rust
Builder
MMeet Paladiya
DeFiAIRWA

PrimeVaults

PrimeVaults is an on-chain savings protocol built for stable yield. It features real-time, verifiable on-chain proof-of-reserves to protect principal, implemented as an upgraded ERC-4626 vault. Our Unified Yield Model optimizes risk-adjusted strategy allocation across chains, targeting base returns benchmarked above Aave V3 supply rates.

Tech StackReact, Vue, Web3, Ethers, Solidity, Node, Go
Builder
TTuan Le Thanh
DeFi

Chain.Love

Booking.com–style marketplace and payment layer for Web3 infrastructure services, designed for devs and AI agents

Tech StackSolidity, Web3, Next, Node, Go
Builder
SSergei Revenko
InfraAI
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