The operating system for daily fantasy players

See how the best DFS players actually play.

Go beyond projections and optimizers. Explore real winning lineups, uncover player tendencies, find better contests, and test any projections against actual results. All across DraftKings and FanDuel.

Free plan. No credit card. Upgrade when you're ready.

Slate Review and Contest Analysis in dfsOS

See what won, what was wagered and where the leverage was.

DraftKings + FanDuel

Works alongside the tools you already use.

See all compatible sites
  • SaberSimSaberSim
  • FantasyCruncherFantasyCruncher
  • StokasticStokastic
  • RotoGrindersRotoGrinders
  • Compounding EdgesCompounding Edges
  • The SolverThe Solver
  • DFS ArmyDFS Army
  • Establish the RunEstablish the Run
  • Paydirt AnalyticsPaydirt Analytics
  • Run Pure SportsRun Pure Sports
  • Run the SimsRun the Sims
  • Ship it NationShip it Nation
  • and many more
New

The DFS data you've never had on FanDuel.

FanDuel opened up contest data on October 1. Player profiles, slate review, projection backtesting, game style and contest analysis now cover FanDuel and DraftKings. Nobody else has this.

Look up a FanDuel player
FanDuel slate review in dfsOS: contests, entries, wagered, won and house edge for an NFL slate

Study the field

Look up any DFS player and see exactly how they play.

Search a DraftKings or FanDuel username and get their results by sport and year, the lineups they entered, their exposures and their stacks.

Site
A DraftKings player profile in dfsOS

Then get better at every step.

DraftKings + FanDuel

Review what actually happened.

See what won, what was wagered and what the house kept on every slate. Then see the perfect lineup (and the top 4 possible alternatives) along with where the leverage was.

Explore slate review
Slate Review and Contest Analysis in dfsOS
DraftKings + FanDuel

Find better contests to play.

One lobby covers DraftKings and FanDuel. Sort it by rake, buy-in, prize pool and fill, and save the filters you use.

Explore the contest lobby
The dfsOS contest lobby

Test your process.

Upload any projection CSV, including your own, and see how it would have performed on fantasy points and ownership. Compare any source against final slate results, slate by slate. dfsOS includes baseline projections for seven sports, graded publicly after every slate, and yours are graded the same way.

Upload projections
Projection backtesting in dfsOS

Also inside dfsOS

  • Your home dashboard

    Arrange, resize and save the widgets you use.

  • AI analyst

    Ask plain-English questions about slates, players and contests. All-Access, beta.

  • News and alerts

    The news that moves a slate, with rules that tell you when it breaks.

  • Bankroll Tracker

    Upload your contest history and track results over time.

Pick the plan that matches how you play.

Start free, then upgrade when exports, alerts, and deeper review become part of your process.

Free

Explore dfsOS

See how the data works, at no cost.

$0/mo

You can:

  • Browse and filter contests on DraftKings and FanDuel
  • See the perfect lineup for any slate
  • Review any slate: winning lineups, ownership and full history
  • Search players and view the leaderboards
  • Upload your contest history and track your bankroll
  • Read news headlines and check weather
  • Arrange your home dashboard and claim your profile
  • Set 3 alerts
Get Started

Pro

Improve your process

You play most weeks and want better information.

$29/mo

Early adopter rate. Lock in $29/mo before $49/mo.

Everything in Free, and you can:

  • Break down any contest by leverage, ownership and stacks
  • See how winning rosters are built by position, salary and ownership
  • Use full projections and export them to your optimizer
  • Analyze your bankroll with tilt and drawdown detection
  • Read full news analysis and get push alerts (20 rules)
  • Add live slate widgets to your projections page
Lock In $29/mo
Less than $1/day

at the early-adopter rate

Most Popular

All-Access

Unlock the full data

Every player's full history, every upload graded.

$59/mo

Early adopter rate. Lock in $59/mo before $99/mo.

Everything in Pro, and you can:

  • Study any player's full history, lineups and tendencies
  • Upload and backtest any projections, including your own
  • Find duplicate-lineup and roster-construction patterns
  • Ask the AI analyst
  • Get unlimited alerts, with Discord DMs
  • Get priority support and try new features first
Lock In $59/mo
Less than $2/day

at the early-adopter rate

Contest Vault is coming with the archive release for both Pro and All-Access, with the same research limits across all archived sports. It remains an admin-only pilot until subscriber access is enabled.

Early-adopter pricing

Lock in Pro or All-Access.

Paid plans bill at checkout. Try the demo if you want to look around first. Cancel anytime. Prices exclude applicable taxes.

Lock in Pro

Not ready to sign up? Walk through the full app with sample data — no account needed.

Explore the live demo →
Prefer machine-readable? → pricing.md

Stop guessing about what happened. Study it. Test it. Get better.

Start free

Free plan. No credit card. Upgrade when you're ready.

dfsOSdaily newsletter

See which DFS players won big yesterday.

dfsOSdaily recaps the names and lineups at the top of major contests, plus slate takeaways, product updates, and practical DFS workflow ideas — delivered every morning before lock.

Previous-day winnersSlate takeawaysFree to read

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