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Basketball league software — the season runs itself

The same engine that runs our softball seasons, speaking basketball: courts instead of fields, points instead of runs. Rosters, schedule, confirmed scores, standings, and playoffs — handled.

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Live today on Contender OS. No staff work. No paperwork.

What it is

Adult basketball leagues run on the same bookkeeping as every team season — registration, a fair schedule, scores somebody has to chase, standings, and a playoff bracket — usually held together by one organizer and a spreadsheet. Contender OS's team-season engine runs it: captains register teams and manage rosters, the round-robin schedule generates across your courts, and a score is final only when the opposing captain confirms it. Standings sort on win percentage, head-to-head, and points for and against, and the season ends in a seeded single-elimination bracket that crowns the champion.

How the season runs

STEPCaptains register their teamsA captain signs the team up and builds the roster; registration closes on its own when the schedule is generated.

STEPThe schedule builds itselfRound-robin fixtures across your courts — a double round robin at most, home and away swapped on the second pass, byes handled for odd team counts.

STEPCaptains report, opponents confirmEither captain reports the final score; only the opposing captain can confirm it. A dispute freezes the game for league staff, never an auto-ruling.

STEPPlayoffs seed themselvesOnce every regular game is final, the bracket generates from the standings in standard seed order and plays down to the champion.

What's built in

Captain-run teams and rosters — one team per captain, rosters up to 20 by default, players added by email identity.
Automatic round-robin schedules — weeks and games per week are settings; courts cycle, and odd team counts get byes.
Two-captain score confirmation — the reporter can never confirm their own report; disputes hold for staff with the reported scores, corrected scores, or a void. Playoff games cannot be finalized tied.
Postponements handled — a postponed game reschedules into a new week and court with its scores cleared.
Standings with real tiebreaks — win percentage, then head-to-head inside the tie, then point differential, then points scored.
Seeded playoffs — 2/4/8/16-team brackets in standard seed order; rounds advance automatically and the final freezes the season with its champion.

Who it's for

Built for adult basketball leagues — gym leagues, rec-center leagues, and independent organizers — anywhere the season currently runs on one person's spreadsheet. Adult leagues only: there are no youth features and no minor accounts.

Pricing

Contender OS — $99/mo per venue runs this format with the full system. Early venues can lock the Founding Operator rate of $59/mo for 12 months with the first season free. Prefer a season at a time? 6 weeks for $149 or 12 weeks for $249. Brackets-only starts at $39/mo with Bracket Box. Full details on the pricing section.

Questions

Who does the day-to-day work?

Captains do: they register teams, manage rosters, report scores, and confirm opponents' scores. League staff handle the season-level steps — creating the season, generating the schedule and the playoffs, and settling disputes.

What does it cost?

Contender OS is $99/mo per venue for the full system, or $59/mo locked for 12 months on the Founding Operator rate with your first season free. Season passes run $149 for 6 weeks or $249 for 12 weeks, and the brackets-only Bracket Box tier is $39/mo. One flat price per venue — no per-player fees on the monthly plans.

What do teams need?

A captain with a phone. Rosters are built by email, scores are reported and confirmed on phones, and the schedule and standings are public pages anyone can check.

How are scores and arguments handled?

A captain reports the final score and the opposing captain confirms it — a reporter can never confirm their own report. If the opposing captain disputes it, the game freezes exactly as reported until league staff settle it with the reported scores, corrected scores, or a void. Disputes are never auto-resolved.

Also runs on Contender OS

One system for every league night in the building.

Arcade leagues Pinball Bowling leagues Rack sports — darts, pool & cornhole Trivia Night Karaoke Night Pickleball & tennis ladders TCG store leagues Skee-ball leagues Music Bingo Softball leagues Contender OS — all formats

Operators: get on the list

Contender OS is in live league play now with its founding operator, the National Arcade Championship. Outside operators come next. Tell us about your room and your league, and you'll hear from us as seats open.