Arguably the best time of the year, March Madness brings us the most exciting tournament in all of sports, pitting 68 teams against each other to see who will be crowned the champion. During the tournament, DFS apps like Underdog, Sleeper, and FanDuel see a spike in their usage, nearly doubling in revenue and in downloads since 2023 with 167 billion dollars being wagered annually. If you want to get in on the action during the tournament, below is a review of the best March Madness DFS sites to help guide you as you venture into the ever growing industry.Narrowing our focus on the best DFS apps, FanDuel, Sleeper, Underdog, and Ownersbox immediately stand out when compared to the rest of the field. Underdog has seen a massive bump in usage over the past few years, giving their users some flexibility in how they can bet in the space, including Pick’em and Best Ball drafts.FanDuel is one of the more prominent names in the industry, allowing users to wager on classic DFS contests, constructing rosters under a salary cap. Sleeper and Ownersbox are more of a blend of the two, mixing classic DFS with Pick’ems for more added excitement.How we chose the best March Madness DFS sitesWhen it comes to choosing which app you would like to use, there are multiple factors to consider, including the variety of contests they offer and how well the platform performs. An app that constantly glitches and crashes can be very frustrating, as well as being tied to just one style of play.Promotions have also started to become paramount, giving their users a reason to keep coming back, especially when they fall into a slump. Payout speeds are also vital to consider as some apps can take a few business days to send you your withdrawal requests while others send it to you within the day.You also need to factor in the app’s availability as not every state has legalized DFS, meaning you will not be able to use the app within your state borders. Some apps are also legal in some states and not in others, so make sure you verify if you can use it before trying to make an account.A closer look at the best March Madness DFS sitesUnderdogOne of the fastest growing DFS apps in the industry, Underdog has captivated the nation with its mixture of Pick’em and Best Ball drafts, giving their users a mixture of short form and long term contests. Their simple platform makes it easy to make multiple entries, keeping their audience engaged while driving up their volume.ProsCons Wide range of Pick’em markets Some of the formats can only be used in certain states Incredibly friendly userface Best ball draftsUnderdog welcome offerGet up to $1,000 in free bets via a deposit matchIf you create an account during March Madness, you can get up to $1,000 in free bets with Underdog’s deposit match. The percentage of the match may vary depending on when you’re signing up, and where you’re signing up from – but you’ll always be able to claim up to $1,000 in bonuses.Therefore, if the deposit match at the time of registering is 50%, you would need to deposit $2,000 to unlock the entire amount. With the Sweet Sixteen and Elite Eight taking place this weekend, you’ll have no shortage of chances to back multiple teams and players. Available statesAs alluded to earlier, some formats are restricted depending which state you live in.Full access: AL, AK, AR, AK, CA, CO, DE, FL, GA, IL, IN, KA, KY, MA, MN, MO, NE, NH, NM, NY, NC, ND, OK, OR, RI, SC, SD, TN, TX, UT, VE, VI, WV, WI, WY, DC.Partial access: MD, MI, MS, NJ, OH, PN.If your state was not listed above, then it is currently not available.SleeperKnown for their imprint in fantasy football, Sleeper has turned into one of the better March Madness pick’em apps, offering a hybrid of contests for their users to choose from. Unlike most apps, Sleeper also does a great job in a social aspect, allowing you to chat with friends and form leagues amongst each other. While the interface can be cleaned up a little, Sleeper’s versatility has helped them stand out among the rest of their competition.ProsCons Hybrid grouping of contests Interface feels clogged and overwhelming Social aspect makes you feel more connected Dynamic multipliersSleeper welcome offerNew users get a free $20 in bonus credits for signing up + 100% deposit match up to $100One of the better sign up offers in the industry, you can receive $20 in bonus credits just for signing up, as well as up to another $100 by taking advantage of their deposit match. Bonus credits must be played through in order to withdraw as cash. Make sure to use our code – TALKSPORT – when signing up.Available statesSome states only allow you to use their free features, restricting access to their paid contestsRestricted: AZ, CO, CT, DE, HI, ID, IA, LA, MA, MD, MI, MS, MO, NV, NJ, NY, OH, PN, WAFanDuelOne of the original big names in the space, FanDuel features classic DFS contests, configuring lineups under a salary cap with the goal of finishing with the most points at the end of the slate. Contests include cash games and tournaments, giving their users a variety of options to choose from. Their simple structure makes it easier to navigate, allowing you to make multiple entries in short order.ProsCons Classic DFS contests Competition plagued by DFS bots Lightning quick payouts Simple structure to navigateFanDuel welcome offerPlay $5, get $25 in bonus creditsAfter creating an account, you can get $25 in bonus credits after making an initial wager of at least $5. Depending on the promo requirements, you may need to place a bet on a certain contest to activate your bonus credits. Bonus credits can not be withdrawn, meaning you need to use them after activation.Available statesSome states limit the types of contests that are available, as well as now allow DFS betting on college sports.Restricted: CT, IA, LA, MA, MD, MI, MO, NV, NJ, OH, PNUnavailable: ID, HI, WAWhat is DFS for March Madness?A unique style of sports betting, DFS “Daily Fantasy Sports” focuses on slates as a whole for their respective sports. Including Pick’ems where you essentially build a parlay, picking anywhere from 2-5 over/under markets, needing all of them to win to cash your bet. There are no traditional odds as each leg added to your Pick’em slip gets you to a certain multiplier.Certain apps like FanDuel still run traditional DFS contests, pitting you against a pool of players to see who can construct the best roster within a certain salary cap.DFS vs sportsbook betting for March MadnessWhen comparing DFS and Sports Betting apps, DFS is more straightforward, making prediction based wagers with a set payout depending on volume of entries or multipliers in a Pick’em. Sports Betting apps are odds based, meaning your potential payout is determined by the listed odds on the app at the time you make the bet.In regard to availability, DFS is more widely available in the United States with 40+ states allowing you to use them in some form or fashion. Sports betting is currently available in just 39 states, yet some still have restrictions on mobile usage, forcing you to make in person bets at kiosks and casinos.Is March Madness DFS legal in my state?When it comes to using DFS apps in a legal state, you must be within the state’s borders at the time of use in order to place a wager. When in a state that is not permitted or restricted, the app will notify you, blocking any type of wager. Each state has their own restrictions, making it vital you know which ones allow the type of betting you prefer. As of writing, only five states have completely banned DFS apps for real money play, including Hawaii, Idaho, Montana, Nevada, and Washington.Best DFS strategies for March MadnessWhen it comes to betting on DFS apps, there are a few strategies you need to consider in order to maximize your chances of winning. In Salary Cap contests, focus on players who have a high usage rate, as well as playing in fast paced style of games to increase their chances of generating more points. Injuries are also worth monitoring, making it vital to avoid players who are currently hampered by one. You also want to target players who will receive a heavier workload due to one of their teammates being out with an injury, allowing you to buy someone cheap to help spend more money elsewhere.In Pick’em contests, creating 2-3 pick slips will help you stack more profit over time when compared to larger slips for bigger payouts as each leg increases your amount of variance in your bet, lowering your chances of winning.Popular March Madness DFS picksPlayer pointsHow many points a player scores in a game. Ex: Darryn Peterson over/under 14.5 Points. You would pick if he will score more or less than 14.5 Points.Player reboundsHow many rebounds a player records in a game. Ex: Cameron Boozer over/under 7.5 Rebounds. You would pick if Boozer would haul in more or less than 7.5 Rebounds.Player assistsHow many assists a player dishes out in a game. Ex: Darius Acuff Jr over/under 5.5 Assists. You would pick if Acuff would record more or less than 5.5 Assists.Three-point shotsHow many three-point shots a player makes in a game. Ex: Caleb Wilson over/under 1.5 Three-pointers Made. You would pick if Wilson makes more or less than 1.5 three-pointers.How March Madness worksFor those new to March Madness, it is a single elimination tournament featuring 68 teams. Eight teams play in the “first four” on Tuesday and Wednesday with the four winners moving onto the first round. The first and second rounds take place Thursday-Sunday, narrowing the field to 16. In the second week of the tournament, games once again take place Thursday-Sunday, trimming it down to the Final Four. The winners of the Final Four then face off against each other in the National Championship, crowning a winner.Who to watch in March Madness 2026Plenty of star players will be featured in this year’s tournament, including Darryn Peterson who is expected to be the first overall pick in the NBA Draft. Cameron Boozer will also look to make his mark as the leader of the Duke Blue Devils, captaining the best team in the tournament. Rivaling Duke is Michigan, a Wolverines team who is chalk full of talent, boasting one of the best lineups in the nation.Rounding out the cream of the crop is Arizona, Florida, Iowa State, and Houston, all well-rounded contenders who are poised to make a deep run in the tournament. After winning the National Championship last year, the Gators will have the opportunity to be the ninth team in the history of the sport to win the title two years in a row.How to get started with March Madness DFS sitesOnce you choose which DFS app you would like to use, below are a list of steps of how to get started.Create an account by filling out the required information during the signup processMake an initial deposit using your favorite available method. Make sure to check if the signup bonus has a minimum amount you need to deposit in order to activate itChoose which contest you would like to participate inMake your picks, choosing which players will go over or under their listed totalChoose how much you want to wager on your entry and hit submitHow to track your March Madness DFS picksAfter placing an entry, there are multiple ways you can track how your players are doing, Including refreshing the app you placed the bet on if applicable, checking live game stats on a third party tracking app, and utilizing social media.March Madness DFS Q&A1. Is DFS the same as Betting?While DFS does share some similarities as Sports Betting, they are still vastly different. DFS is prediction based betting with set payouts pending how many legs you stack together while Sports Betting is odds based. Sports Betting markets are also responsive to how their users are wagering on them while DFS payouts are based on multipliers.2. Can I play DFS for free?Some DFS apps do offer free to play markets, normally in the form of a tournament, pitting you against a large player pool.3. What happens if a player doesn’t play?If a player does not record any playing time, then that leg of your entry will be voided, altering your payout to reflect how many available legs are left. If your player does play and gets injured during it, then their stats will be finalized even though they did not play the full length of the game.4. Can I enter multiple lineups?If the contest you choose to participate in allows you to make multiple entries, then yes. Be sure to read the house rules before entering as some contests allow you to make only one entry.About the authorKody MalstromKody Malstrom is a professional sports bettor and sports betting journalist with six years of experience covering a vast majority of sports. He covers football, basketball, hockey, baseball, and the UFC in written and video form.Born and raised in Michigan, Kody is a Detroit sports fan who spends all of his Sundays in the fall rooting for the Detroit Lions and Saturdays watching as much College Football as possible. In the winter, he shifts his focus to the Detroit Red Wings and Pistons while simultaneously rooting for his North Carolina Tar Heels.When he is not staring at betting markets, you can find Kody at the beach or snowboarding down a mountain, depending on the time of the year.Remember to gamble responsiblyA responsible gambler is someone who:Establishes time and monetary limits before playingOnly gambles with money they can afford to loseNever chase their lossesDoesn’t gamble if they’re upset, angry or depressedGamcare – www.gamcare.org.ukGambleAware – www.gambleaware.orgFind our detailed guide on responsible gambling practices here.For help with a gambling problem, call the National Gambling Helpline on 0808 8020 133 or go to www.gamstop.co.uk to be excluded from all UK-regulated gambling websites.Most read in BettingBest online poker sites UK: Best poker sites with licenses (2026)Best cash out betting sites in February 2026Best £5 deposit betting sites in March 2026Best football betting sites for UK punters in March 2026Free Bets & betting offers 2026 - Claim £1000+ in bonuses for MarchBest betting sites in the UK 2026: Tested, ranked & expert reviewed