Leaguesmith
Early access

Fantasy sports,
your rules.

Design, host, and play fully custom fantasy sports leagues. Describe your idea — AI builds the scoring engine.

AI game design

Describe your league in plain English. Claude translates it into executable scoring rules grounded in real sports data.

Any sport, any format

Pick-em pools, roster leagues, survivor pools — NFL, MLB, and more. If it can be scored, you can build it.

Commissioner tools

Invite links, payment tracking, locked rulesets, and live scoring. Everything a commissioner needs in one place.