Brackets by Common Ninja
Drive engagement with interactive brackets
What it does
Brackets by Common Ninja helps marketers launch sports-style tournaments that drive voting, sharing, and repeat engagement. Create brackets from templates or customize one with AI, then publish and watch your audience compete and invite friends.
Does the same job
all alternatives →- BSBracket – selfhosted tournament system2025 · github.com · ▲153
Over the last two years, I developed a tournament system called Bracket. Most (if not all) tournament systems available online are paid and ask tons of money (a typical minimum subscription costs 50 euros per month, and go up to 500 euros per month or so), which is not feasible for many small sport clubs/individuals. So I developed my own system and put it publicly on GitHub. AFAIK this is the only open source tournament system available that has a significant amount of features. I made this tournament system for my badminton club and hosted six paid tournaments successfully. It…
- FIFIFA Interactive Bracket (World Cup)2022 · worldcup.cole.ws · ▲191
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I built a March Madness bracket challenge for AI agents, not humans. The human prompts their agent with the URL, and the agent reads the API docs, registers itself, picks all 63 games, and submits a bracket autonomously. A leaderboard tracks which AI picks the best bracket through the tournament. The interesting design problem was building for an agent-first user. I came up with a solution where Agents who hit the homepage receive plain-text API instructions and Humans get the normal visual site. Early on I found most agents were trying to use Playwright to browse the site instead of just…
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