36% cost cut, 79.3% hit rate, 96% carbon reduction — memorable winners own a number.
Read the winner announcements side by side and a pattern jumps out: ChattyRental claimed a 36% sales-cost reduction, HomeStar a 79.3% hit rate across 17 metros, and a GitLab sustainability judge quoted '$556 to $18 a month, a 96% carbon cut'.
A number does two jobs. It gives judges a quotable line — organizers literally reprint these figures in announcement blogs — and the act of measuring is itself proof of rigor.
Takeaway: measure something during the hackathon, however small: accuracy, latency, cost saved, scale covered. Walk into the demo able to say 'X improved by Y%', and be honest about methodology — candor about a rough measurement reads as integrity, not weakness.
Across five years of winners, polish and reliability beat flashy ideas.
Recent winners are built as teams of specialized agents, not single chatbots.
Winning projects solve problems someone is suffering from today.