The next wave of onchain primitives will be built by founders supported from day one.
If you're pre-mainnet or bringing a new idea onchain, join our online buildathon + IRL NYC Open House and build on Arbitrum’s institutional-grade rails.
More details 👇
Top teams from Arbitrum Open House Build are invited to an in-person Founder House in NYC, March 6-8.
Get hands-on mentorship, deep technical + product feedback, and connect with builders, investors, and ecosystem leaders.
Build online. Scale IRL: luma.com/openhouse-newyork?u…
Jan 29, 2026 · 4:19 PM UTC
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Starting Feb 5, the online Buildathon gives early teams 3 weeks of workshops, GTM sessions, mentorship and ecosystem support to turn ideas into MVPs.
Top teams earn $30K in prizes, qualify for $30K in grants, and the top 3 join the NYC Founder House.
Apply today.
arbitrum-nyc.hackquest.io/bu…
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We also invite founders to apply to our IRL Arbitrum Open House in NYC on March 6.
Unlike the online Buildathon, Open House is a 3-day, in-person, selective founder program for teams ready to ship onchain.
Founders will work closely with leading ecosystem builders and Arbitrum teams, receiving high-signal product feedback, technical guidance, and more.
Apply today.
luma.com/openhouse-newyork?u…
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