What it is
A three week online buildathon from the Arbitrum Foundation, part of the Arbitrum Open House series. Singapore is where ambitious startups, global capital and Asia's rapidly growing onchain ecosystem converge, and this edition builds toward an in-person Founder House there.
What you build
Ship a project on an Arbitrum chain: Arbitrum One, Arbitrum Sepolia or Robinhood Chain. Solidity and Rust via Stylus are both supported. Teams are building across DeFi, gaming, social, DePIN and entirely new categories.
Prizes
115,000 USD available across three tracks.
- Overall Prize, 70,000 USDC. First 40,000 USDC, second 20,000 USDC, third 10,000 USDC. At minimum one of the three is reserved for Robinhood Chain and one for Arbitrum.
- Promising Products, 15,000 USDC. First 7,000 USDC, second 5,000 USDC, third 3,000 USDC.
- Grants, up to 30,000 USDC. Milestone-based grants awarded case by case at the organiser's discretion, with no guaranteed recipients.
All prizes are tied to development milestones.
Judging
Smart contract quality (best practices, logical structure, minimal vulnerabilities); product-market fit with clear user retention potential; innovation and originality; and real-world problem solving that addresses a genuine market need.
What winners get
A place at an in-person Founder House in Singapore, with mentorship from Arbitrum's technical team, experienced mentors and ecosystem founders.