Logo

Open House Archive

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

projects-banner

All Projects

By ProjectBy Buildathon
Learn
  • Explore Course
Build
  • Explore Buildathon
  • Project Archive
Hack
Hack Coming Soon
  • Explore IRL Hackhouse
  • How to Qualify
  • Past Events

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

Akan

Lagos, Nigeria.
Champion
14
No.1
S

Skia Variants

The Blockchain
Champion
13
No.2
H

Hafiidh Luqmanul Hakim

Indonesia
Champion
7
No.3

Signal402

x402-powered AI market intelligence for humans and autonomous agents.

Tech StackReact, Next, Web3, Ethers, Node, Go, Solidity, x402
Builder
Zzeng dl
AIInfraDeFi

chadad

On-chain sponsored banners that reward viewers in WETH for verified visibility.

Tech StackReact, Web3, Node, Solidity, Rust
Builder
DDmitry Ivanov
SocialFiInfraAI

AgentGuard VerifyPay

AgentGuard VerifyPay is a policy-controlled escrow layer for autonomous AI agents on Arbitrum. It lets a Buyer Agent hire a Seller Agent within explicit budget, asset, risk, and expiry rules. Quotes that violate policy are BLOCKED, invalid results are FROZEN, and payment is released only after independent verification with publicly verifiable evidence.

Tech StackReact, Node, Solidity, Web3
Builder
CCaptain 0xCaptain
AIDeFiInfra

Apraxus

Apraxus is blockchain infrastructure for the autonomous economy, enabling autonomous agents, programmable payments, and machine-to-machine transactions through EVM-compatible infrastructure and developer-focused onchain tooling.

Tech StackReact, Web3, Solidity, Next, Node, Rust
Builder
DDhruv Kathuria
DeFiInfra

freelance justice

A decentralized dispute resolver powered by GenLayer's AI consensus. Three AI agents (Client Lawyer, Freelancer Lawyer, Neutral Judge) analyze the evidence and reach a verdict.

Tech StackWeb3, Next, Python
Builder
AAmir Mohseni
Other

SliverVine Protocol (BeΔ) — SliverVine ExoMesh — Pre-Consensus Intent Firewall for AI Agents on Arbitrum

SliverVine ExoMesh (Module A) — ExoMesh Agentic Guard (EIP-1193/5792/6963+) pre-consensus exoskeleton · SSRC (pkg/soil_core.wasm · src/services/risk-control.ts · sub-1.8µs warm soil check). SliverVine Sanctuary (Module B) — Sanctuary Async Escort (ERC-7540+) · Treasury escort · Robinhood / Across compliance ingress. V1.0 Buildathon Baseline: Public Open Gateway — no API key · 5 RPS (X-SliverVine-Tier: public).

Tech StackNode, Solidity, TypeScript, Arbitrum / Stylus, Rust / Wasm, Dune Analytics, ZeroDev / Account Abstraction
Builder
Qqum0x Silvervinelabs
DeFiInfraAI

QARBI

Autonomous AI agent civilization on Arbitrum with Conway state engine, hybrid post-quantum security, and onchain settlements.

Tech StackReact, Next, Vue, Web3, Python, Solidity, Rust, NIST FIPS 204 ML-DSA-65
Builder
MMartin Luther
InfraAIDeFi

Alienzone

DeFi Native Anime Franchise

Tech StackReact, Next, Solidity
Builder
YYoann YOUKPO
GamingDeFiSocialFi

Twyne

Twyne is a credit-delegation layer built on top of existing lending markets. It lets users double down on what they already do: passive lenders put their unused borrowing capacity to work for extra yield, while borrowers rent that capacity for a small fee

Tech StackSolidity, Python, Web3, React, Next
Builder
TTaulant Kryeziu
DeFiInfra

OTTO

Infra for launching AI DAOs

Tech StackWeb3, React, Node, Solidity, Ethers
Builder
VVladimir Prosvirkin
DAOAI

Cognivern

Cognivern is a spend-governance control plane for AI agent wallets. Every spend is policy-checked before signing—approved, held, or denied based on budget, vendor, chain, and risk—with FHE-encrypted on-chain budgets keeping limits private. A Gemini 3.1 agent runtime follows a PLAN → EVIDENCE → PREVIEW → CONFIRM → EXECUTE → AUDIT workflow with human approval before spending. Deployed on Arbitrum Sepolia and Robinhood Chain Testnet with Hyperlane cross-chain execution and audit evidence anchored to Filecoin and 0G.

Tech StackReact, Next, Web3, Ethers, Solidity, Node
Builder
Uudi ngethe
AIInfra

Sentidex

Sentidex is a dapp for perpetual attention markets: live tradable prices on who holds attention in crypto and culture.

Tech StackReact, Next, Solidity, Ethers
Builder
RRichard Robertson
SocialFiDeFi
  • Previous
  • 1
  • More pages
  • 5
  • 6
  • 7
  • More pages
  • 95
  • Next

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