Build what's next
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主办
Arbitrum Foundation
黑客松状态
ONLINE
生态
技术栈
参与者
115,000 USD
总奖池
描述
London is where startups, capital, and real-world adoption meet.
Arbitrum has infrastructure trusted by institutions and used by millions.
It’s time to connect the two.
The Open House London Buildathon brings three weeks of intensive building using the same tech stack that BlackRock and Robinhood bet their reputations on.
Three weeks to build something that matters.
DeFi. Gaming. Social Applications. DePin. Something entirely new?
That’s up to you.
Build with Stylus in familiar languages, or with Solidity. Deploy on Arbitrum One or a custom Orbit chain.
Bring an existing project or start from scratch.
No compromises. No limits. Just build.
And there’s plenty to play for.
The top teams will walk away with their share of a $30,000 prize pool, and an opportunity for $30k in grants in our follow-on mentorship program.
But that’s not all.
The top three teams will each win a place at the IRL Founder House in London in June. Four days of intense working with Arbitrum’s technical team and successful ecosystem founders.
Real mentorship, real connections, real paths from idea to funding.
We've built the infrastructure. You bring the vision.
Let's see what happens next.
Agenda & Google Calendar
You can add the official Arbitrum Open House NYC Buildathon Calendar to your Google Calendar to automatically be notified and invited to upcoming workshops, feedback sessions, and more:
Overall prize
70,000 USDC
Overall prize
Overall prize
评委标准
Smart contract quality - code following best practices, structured logically and efficiently, with minimal security vulnerabilities
Product-Market Fit - projects with clear potential to attract and retain users
Innovation and Creativity - original approaches that push boundaries
Best Agentic Project
15,000 USDC
Best Agentic Project
Best Agentic Project
评委标准
Smart contract quality - code following best practices, structured logically and efficiently, with minimal security vulnerabilities
Product-Market Fit - projects with clear potential to attract and retain users
Innovation and Creativity - original approaches that push boundaries
Grants
30,000 USDC
Up to $30k USDC in milestone-based grants for selected projects
We reserve the right to distribute milestone-based grants to selected projects on a case-by-case basis. You are not guaranteed to be selected, and we reserve the right to not select any projects for this.
Grants
评委标准
We reserve the right to distribute milestone-based grants to select projects on a case-by-case basis. You are not guaranteed to receive a grant, and it is at the sole discretion of the Arbitrum Foundation to choose grant recipients. We reserve the right to not select any projects for grants.
时间安排
资源
Hey Open House London builders! We have compiled a list of useful information for you below. Please take a thorough look as most of the information you will be looking for will be covered here.
Ethereum Sepolia - claim testnet ETH, then bridge it to Arbitrum Sepolia using the bridge.
https://sepoliafaucet.com/
https://arbitrum.faucet.dev/
https://www.infura.io/faucet/sepolia
https://sepolia-faucet.pk910.de/
Arbitrum Sepolia - just claim testnet ETH and you're ready to go:
https://arbitrum.faucet.dev/
https://faucet.quicknode.com/arbitrum/sepolia
https://www.l2faucet.com/arbitrum
Arbitrum Sepolia USDC Faucet:
https://faucet.circle.com/
Robinhood Chain Faucet:
https://faucet.testnet.chain.robinhood.com/
Arbitrum Docs: https://docs.arbitrum.io/
Arbitrum SDK: https://github.com/OffchainLabs/arbitrum-sdk
Stylus Docs: https://docs.arbitrum.io/stylus
Stylus By Example: https://stylus-by-example.org
Stylus CLI: https://github.com/OffchainLabs/cargo-stylus
Stylus Rust SDK: https://github.com/OffchainLabs/stylus-sdk-rs
OpenZeppelin Rust Contracts: https://github.com/OpenZeppelin/rust-contracts-stylus
OpenZeppelin Solidity Contracts: https://github.com/OpenZeppelin/openzeppelin-contracts