Arbitrum Open House 2026 is a global builder initiative bringing together high-potential founders and teams building the next generation of businesses on Arbitrum.
Following a high-impact kickoff in New York City with 177 project submissions, we’re bringing Open House to London, one of the world’s most vibrant hubs for founders, developers, and emerging onchain startups.
In partnership with Encode Club, Arbitrum Founder House is an application-only, three day, in-person experience designed for teams already building on Arbitrum and looking to accelerate execution, validate their product direction, and deepen their ecosystem connections.
About Founder House
Founder House is built for founders and teams who already have an existing product, prototype, or business and are actively building.
Selected teams will spend three focused days alongside fellow founders, ecosystem leaders, and mentors working to ship meaningful product progress, validate key assumptions, and receive direct feedback from the Arbitrum ecosystem.
Our expectation is simple: arrive with an existing project, use Founder House to build and launch a meaningful new feature, validate your direction, and leave with stronger momentum than when you arrived.
Prize Tracks
Founder House participants will have access to $300K in prizes and grants designed to support high-potential teams building on Arbitrum.
Prize opportunities include:
- General Builder Track for standout teams building innovative products on Arbitrum
- Robinhood Chain Awards for teams building and innovating on Robinhood Chain
- Agentic & AI Track for AI-powered and agentic applications
- Ecosystem Grants for teams demonstrating strong potential and ecosystem alignment
Most prize tracks include milestone-based funding designed to support continued execution beyond Founder House. The Agentic & AI Track is evaluated separately.
What We’re Looking For
We’re looking for founders who are already building products that can meaningfully leverage Arbitrum and are ready to accelerate their growth.
We are particularly excited to meet teams building across areas such as:
- Stablecoins & Payments
- Tokenization & Real-World Assets
- DeFi & Financial Infrastructure
- AI & Agentic Finance
- Privacy-Preserving Applications
- Consumer Crypto Products
- Developer Tooling & Infrastructure
We’re also excited to support teams building across emerging opportunities in the programmable economy.
These are examples of the types of projects we’d like to support—we are not asking founders to start new projects specifically for Founder House. We encourage teams already building in these categories to apply.
Both solo founders and teams are welcome to apply.
What to Expect
Direct access to and feedback from the Arbitrum Foundation, Offchain Labs, and Open House Sponsors (Robinhood Chain, AWS, Fhenix, GMX, Alchemy, ZeroDev, Dune, Open Zeppelin, CFIT UK) and other ecosystem partners.
- Product, technical, go-to-market, and fundraising guidance
- Hands-on workshops covering the tools and infrastructure needed to build and scale on Arbitrum
- Dedicated time to build alongside high-quality teams
- Opportunities to connect with investors, partners, and ecosystem leaders
Important Information
Applications are reviewed on a rolling basis
Participation is limited and highly curated
Selection is based on product quality, execution potential, and ecosystem alignment
Event logistics, meals, swag, and on-site support will be provided to accepted participants
🗓 Friday, July 10 – Sunday, July 12, 2026
🕔 Time: 10:00 AM – 7:00 PM BST
📍 Encode Hub
41 Pitfield St · London
Find Hotels Arbitrum Open House 2026 London