Last updated July 19, 2026
3Sum League is a free web app for running one-and-done fantasy football leagues with people you know. By creating an account you agree to these terms and to the Privacy Policy.
You must be at least 13 years old. Keep your password private; you're responsible for activity under your account. Provide accurate information, and only invite people who won't mind being invited.
Don't abuse the service: no harassment on league boards, no attempts to access other leagues' data or other users' accounts, no spam, and no use of the invite system to email people who haven't asked for it. We may suspend or remove accounts that do.
The dues pages are a scorekeeping convenience. 3Sum League does not hold, transfer, or guarantee any money; payments happen entirely between league members outside the app.
The service is provided as-is, free of charge, with no warranty of any kind. Player statistics come from third-party sources and may be delayed or wrong. To the maximum extent permitted by law, our liability to you is limited to the amount you paid to use the service: zero.
We may change or discontinue the service, and may update these terms; material changes will be reflected on this page. You can delete your account at any time by emailing privacy@3sumleague.com.