The Delphi Podcast

Clay Robbins: Building Colosseum, Solana’s Largest Hackathon & Accelerator with 80,000 Participants

Jan 19, 2026
Clay Robbins, Co-founder of Coliseum, leads the world's largest hackathons, engaging 80,000 builders. He discusses the shift from remote to in-person acceleration in San Francisco and the importance of Solana as a viable infrastructure. Clay shares insights on efficiently triaging over 2,000 global submissions, his unique pressure test for founders, and the prioritization of high-agency innovators. He also highlights key success stories and introduces a new funding vehicle, emphasizing AI's role in democratizing the building process.
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INSIGHT

Hackathons As A Sourcing Moat

  • Coliseum's differentiation is running large online hackathons that force teams to submit code and pitches, which reveals technical ability and product focus.
  • That funnel lets them source founders at scale and select teams for their accelerator program and investment checks.
ADVICE

Standardize Submissions To Triage Volume

  • Build a submission system that standardizes repos, technical walkthroughs, and pitches to triage at scale.
  • Use mentor judges and layered review to cut thousands of submissions to a focused cohort for investment.
ANECDOTE

Remote To Real-World Accelerator Shift

  • Coliseum moved from fully remote cohorts to renting a San Francisco office after founders asked for in-person time.
  • They now run a 75-desk hub to reduce founder isolation and foster community during and between programs.
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