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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 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
A

Akan

Lagos, Nigeria.
Champion
14
No.2
S

Skia Variants

The Blockchain
Champion
13
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

Formicarium

Formicarium is a decentralized platform where an AI agent coordinates a fleet of autonomous machines and robots to manufacture customized products.

Tech StackWeb3, Python, Solidity
Builder
NNejc Rožman
AIOther

GainJar

GainJar is a decentralized payroll streaming protocol that transforms salary from a monthly event into a continuous, real-time stream on the blockchain. Employees earn second by second and

Tech StackNext, Solidity
Builder
Ssyafiqsan
DeFi

Zeva

Zeva is an intelligent agentic system that manages your wealth on Arbitrum. We wanted to make DeFi as easy as sending a DM. With Zeva, you don't need to be a crypto expert to earn yield. You just tell Zeva what you want to do, and it executes the strategy for you. It’s secured by ZK-Email and your phone's biometrics, so you get the ease of a bank with the security of a hardware wallet.

Tech StackSolidity, React, Next, Web3, Node
Builder
SSeun Victor
InfraDeFiAI

Lion Yield Agent

LionHeart is a Chat-First DeFi Intelligence Platform built on Arbitrum. It pairs every user with OpenClaw — an AI agent that doesn't just answer questions, but proves its competence on-chain. Think of it as a personal quant analyst that: 🎓 Teaches you DeFi (interactive lessons + quizzes) 🔍 Hunts the best yields across 10+ Arbitrum protocols in real-time 📊 Researches markets with live TVL, APY, and risk-tier analysis 🛡️ Earns your trust through an on-chain reputation score (ERC-8004 NFT) 💼 Executes trades only after reaching reputation ≥ 100 (reputation-gated)

Tech StackNext, Web3, Ethers, Solidity
Builder
PPham Dat
DeFiAIOther

Lion Yield Agent

Tech StackNext, Web3, Ethers, Solidity
Builder
NNim
DeFiAIOther

Stylend

Cross-chain lending protocol built with Arbitrum Stylus (Rust) and LayerZero. Supply collateral on Arbitrum, borrow on other chains like Base. Collateral stays on Arbitrum with isolated pools for risk

Tech StackArbitrum Stylus, Rust, LayerZero, Next, React, Arbitrum, Cross-chain, WASM
Builder
AAxel Urwawuska A
DeFi

project 87

AI DeFi bot on Arbitrum that grows USDC treasuries and lets agents spend rewards via API, user‑custodied.

Tech StackWeb3, Python, Ethers
Builder
JJovan Collins
DeFiAIRWA

FlowForge

Personal AI DeFi agent: one place to design, deploy, and execute intelligent on-chain workflows through natural language.

Tech StackReact, Next, Web3, Ethers, Node, Solidity
Builder
AAakash Yadav
DeFiAI

novax yield

Novax Yield tokenizes trade receivables on Arbitrum Sepolia, connecting Africa-Asia exporters with global investors. Exporters get immediate liquidity; investors earn 8-12% APY from verified invoices.

Tech StackReact, Web3, Ethers, Solidity
Builder
SSamuel Aleonomoh
DeFiRWANFT

aiSports - NBA Daily Fantasy

Web3 fantasy sports that feel like Web2 - stablecoin contests paid out onchain. Live on Arbitrum sepolia - contests running everyday. Fast & Friendly UX, and transparent payouts.

Tech StackReact, Solidity, Web3, Ethers, Node, Next
Builder
CCJ Carnicle
NFTGamingDeFiAI

Arbnomo

The first on-chain binary options trading dapp on Blockchain

Tech StackNext, Web3, Solidity, Supabase, Pyth Oracles, x402
Builder
AAmaan Sayyad
SocialFiGaming

Railbridge

Railbridge is a financial suite for x402 merchants. A complete merchant dashboard to track x402 revenue, API metrics, and unified account balance. Powered by cross-chain facilitator

Tech StackWeb3, Node, Next
Builder
MMarco Widjaja
DeFiInfraAI
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