Every tool. One engine. Built to win.
Build up to 10,000 lineups in under a minute. Simulate them 10,000 times against your contest's real payouts and a field modeled on it. Fill up to 150 entries from one pool. Then the parts nobody else has: Playbooks, Playbook Replay, Hero IQ, and Hero Chat. All 14 sports. DraftKings and FanDuel.
Build it. Sim it. Fill it.
Pull your contests straight from DraftKings and FanDuel. Shape the pool with live projections and your own reads. Build and simulate in one click: a field modeled on how entrants play your contest, 10,000 simulations against its real payout curve, and real odds back for every lineup. Select, fill up to 150 entries, export one upload-ready CSV. After lock, late swap re-solves the unlocked slots.
Up to 10,000 optimized lineups in under a minute
10,000 simulations per contest, real payout curves
Fields modeled on how entrants play your contest
ROI, win rate, and cash rate on every lineup
Jacob Lopez, Ezequiel Duran, Samad Taylor, Austin Riley, Elly De La Cruz, Jackson Merrill, H. Rodriguez, Wyatt Langford, F. Tatis Jr.
Cody Bradford, Matt Olson, Zack Gelof, Sal Stewart, X. Bogaerts, R. Acuna Jr., Jackson Merrill, Austin Hays, James Wood
Casey Mize, Ezequiel Duran, CJ Abrams, Zack Gelof, Corey Seager, F. Tatis Jr., M. Harris II, Wyatt Langford, H. Rodriguez
The game is played first. Every number comes from it.
Before lock, Game Sim plays every game on the slate 10,000 times, with an engine built for the sport: at-bat by at-bat, possession by possession, drive by drive. For every player, the Hero Projection is the average of those games. The outlook, the correlation heatmap, and every contest sim read from the same games. One simulation, start to finish.
The projection comes out of the game
The Hero Projection is the mean of 10,000 simulated games, and the outlook shows the 25th to the 99th percentile of them.
Boom together, fade together
The correlation heatmap shows which pairs rise and fall in the same games, straight from the simulation.
The contest sim scores inside those games
Players are scored in the same simulated games, so a stack wins together or loses together.
Replay a game
Step through one simulated game at a time, play by play, at up to 4x. MLB, NBA, WNBA, CBB, NFL, and CFB.
Proj is the average game · the 50th is the middle game · each column is the score that percentile of simulated games stays under.
- S. Horwitz PIT + B. Lowe PIT+0.20
- D. Gilbert SF + C. Koss SF+0.19
- T. Hill SF + A. Knizner SF+0.18
- B. Tidwell SF vs B. Lowe PIT-0.40
- B. Tidwell SF vs S. Horwitz PIT-0.38
- B. Tidwell SF vs B. Reynolds PIT-0.37
See what the winners did that you didn't.
Open any finished contest and read the whole field: where ownership piled in, which stacks cashed, how the top entrants built, and which lineups were duped. Full rosters on DraftKings, and on FanDuel wherever DFS Hero has the lineup file.
Ownership and the stacks that cashed
Player ownership, team stacks, and stack types, straight from the results.
What the top entrants did
Pick the top 1%, 5%, 10%, or 20% of the field and see how those entrants built against everyone else.
The dupes
Every duplicated lineup, how many times it ran, and where it finished.
Prove the edge before you risk it.
Score any lineups against a real, finished contest: its actual leaderboard, its actual payouts. Your own entries, or a saved build's pool. Know what the strategy paid before you trust it.
Real contest, real result
Every lineup is placed on the finished leaderboard and paid by the real payout table, not a theoretical field.
Profit, ROI, and finish
See what the set returned, the cash line, and where each lineup finished.
Any lineups, any finished slate
Your entries or a saved build, on any past slate with a scored contest. Power replays a whole playbook on up to 20 slates.
See Playbook Replay
14,268 entries · $1.00 entry fee
Your contests, graded against the field.
Upload your entries or save your DraftKings or FanDuel username, and DFS Hero pulls your finishes from the final standings of the contests it tracks: where each entry landed, what it paid, and how it stacked up against the field. Import your history files to add older and smaller contests. Hero IQ reads all of it and names the leaks.
Tracked automatically
Upload your entries, or save your site username once. Your tracked contests land in Film Room after their final standings post.
Graded against the field
Your top-1%, top-10%, and cash rates against a random entry in the same contests, and whether being different or playing DFS Hero lineups pays for you.
Your whole history
Import the DraftKings and FanDuel exports for older and smaller contests. Profit and ROI by sport, contest type, entry fee, and month.
$106.11
192.9%
169
17.2%
You are currently profitable overall but struggling in specific areas.
NBA 739.8% ROI across 44 entries. Your best performance comes from NBA contests.
10,000-plus-entry contests. 13 entries, -33.3% ROI. Reduce exposure rather than treating the shortfall as variance.
See exactly how the pros play.
Look up any DraftKings or FanDuel username and read the contests DFS Hero tracked for it: what the pro spent, what it paid, and how often it hit the top 1%. Then the habits behind it: the player pool, plus ownership, salary, and stacks, each set beside the field and the top 1% of the same contests. Open any slate for the best lineup and every exposure beside the field, then set the pro's numbers beside yours.
Included with the Power plan.
Any username, both sites
Look up any DraftKings or FanDuel name and keep up to 10 on your watchlist. Each site counts on its own.
Graded against the top 1%
Ownership, salary left, stack size, and stack types, each beside the top 1% and the field of the same contests.
Slate by slate
The best lineup seat by seat, every exposure beside the field, and the field's top plays the pro left out.
The pro and you
The pro's numbers over yours, and the scout's take on what to try. Every plan sees the featured pros.
$18,590
$4,500 spent
413.1%
$23,090 paid out
1.34x
4 vs 3.0 expected
2 tracked contests across 2 slates · Best finish 1st of 26,428
More contrarian lineups
52.3%of lineups in the least-owned third
Top 1% 15.6% · Field 33.4% · 2 contests
Leaves salary more often
85.7%of lineups leave salary
Top 1% 62.3% · Field 70.4% · 2 contests
Learn how your tournament gets won.
Pick a tournament, such as the DraftKings NFL Spy on the main slate, and read its past contests together. See how the winners, the top 1%, and the cashing lineups differ from the field: ownership, salary left, stacks, positions, and duplicates. Only a pattern that holds slate after slate earns an Edge or a Fade.
Included with the Power plan.
Every finish group
The winners, the top 0.1%, 1%, and 10%, and the cashing lineups, each beside the field. DraftKings from December 2025 and FanDuel from October 2026, in fields of 500 or more.
Only steady patterns count
A row earns Edge or Fade only when it holds across slates, so noise never reads as a finding.
Straight into your build
When a build setting can hold a steady edge, apply it to your build or save it to a playbook. The short version sums up the report in plain words.
Saved reports
Save up to 20 reports and get a notification when new contests land. Every plan opens the featured reports.
Spy
31 contests · 55,412 entries · 13 slates
$5.5M
31 contests
22.8%
of all entries
221.4
Mean score
Players under 10% owned2-3
x1.31Steady edge
- Top 1%
- 41.2%
- Field
- 31.5%
Chalk players (20% owned or more)4
x0.78Steady fade
- Top 1%
- 14.6%
- Field
- 18.7%
Set the loop. Close the tab.
The first Playbooks in DFS. Chain build, sim, select, and fill into one workflow you run every slate. Schedule it on the engine, pick when it must be ready, then walk away. The engine keeps working.
Included with the Power plan.
Chain the whole process
Build, simulate, select, and fill in one reusable multi-step playbook.
Run it in the cloud
Schedule a playbook on the engine. Close the browser; the run still finishes, and your phone gets the push.
Ready before lock
Pick the window: the run ready 5 to 30 minutes before lock, every step timed in the Mission Report.
Prove it first
Replay the playbook on up to 20 past slates in one run before you schedule it.
See Playbook Replay
MLB FD Showdown · Small Fields
MLB · FanDuelShowdown
Twenty past slates. One run. A verdict.
The first DFS tool that backtests a whole playbook. Everywhere else you backtest one slate at a time. Here one run replays your playbook on up to 20 past slates, end to end on each, scored against the real contest. The ledger reports profit, ROI, cash rate, and best finish, and, from three scored slates, says whether to keep running it.
Included with the Power plan.
Up to 20 slates, one run
Pick the last 5, 10, or 20 slates in one click. Every one rebuilds and scores while you wait.
The contest you name, per slate
Each slate scores against a real contest, its leaderboard and its payout curve, at the entry count you set.
An honest sample
One or two scored slates prove nothing, and it says so. Three to 14 read as an early signal. A slate that carried most of the return gets called out.
Every version kept, tested side by side
Each replay keeps the settings it ran. Build 2 to 4 versions together on the same slates, then apply the one that came out ahead.
Sun, Aug 31
Sat, Aug 30
Working so far. Keep running it.
+$9,980.48+279.1% ROIOver 20 slates.
Staked $3,576.00 · Returned $13,556.48 · Cash rate 26.9% (200/744) · Best finish #1
Most of this return came from Aug 26. One slate carried 81% of the total returned.
AI on the strategy. None in the build.
The first DFS tool with an AI that reads your own results, and an AI that runs the Workspace with you. Hero IQ reads your play history and coaches the leaks. Hero Chat finds the contest, proposes the settings, applies them on your OK, and fires the build. The build itself runs no AI: it is the same engine build the Build button runs.
Included with the Power plan.
Hero IQ coaching
Reads your builds, entered contests, and Film Room results, then calls out the leaks worth fixing.
Hero Chat co-pilot
Finds the contest, proposes build settings, applies them on your OK, and runs the build. It can sim, fill, export, and late swap too.
Advice, then the engine's own build
The AI advises. The build that follows is the optimizer and the sim, with no AI step inside it.
Hero MCP for the AI you use
Connect ChatGPT, Claude, Cursor, or another AI app. It reads Hero's numbers and runs your playbooks on the engine.
See the Hero MCP
Hey - what's the play?
Apply the recommended build — 4-stack (HOU, TOR), lineup count to 150
- Stacking on, 4-stack from HOU and TOR
- Max exposure 35%
- Selection: Win Paths
Six more, one click away.
Five of these live inside the Workspace, a click away once you are in a slate. Day View runs across the whole day. All of them read from the same data and sims as everything else.
Handbuild Mode
Build one lineup at a time by hand, with the full data and sims behind you.
Coverage
Selects a lineup set that maximizes independent paths to a win, diversifying by outcome.
Stack IQ
Ranks the strongest correlated stacks on the slate before you build. NFL, NHL, MLB, and CFB classic slates.
Lineup Filter
Slice your built pool by any metric to isolate exactly the lineups you want.
Projection Hub
Upload your own numbers, blend the sources you trust, or build a custom scoring formula. It all writes to My Proj.
Day View + Contest Lobby
The day’s slates in one place, with a lobby that ranks every contest by prize and rake, and by live overlay near lock.
Every tool. One engine.
Essential is every core tool and 500 lineups per build. Power raises the cap to 10,000 and adds Playbooks, Playbook Replay, the full Hero IQ read, and higher Hero Chat limits. All 14 sports, both sites.
$1 for 5 days · Cancel anytime