Best US Online Casinos Ranked: Spartans Surpasses BetMGM, DraftKings, and BetRivers in 2025

The online casino industry in the US has become a massive market where top brands compete to deliver speed, value, and entertainment. Players now expect instant deposits, fast withdrawals, and a broad game library without long waits or outdated verification.

Within this growing space, some platforms stand out through promotions, technology, and variety. Yet one casino has managed to pull ahead with a model that feels modern and efficient. Spartans, built around crypto, offers a faster and more flexible experience than many traditional operators. For this reason, it claims a strong position among the best US online casinos.

1. Spartans: Crypto Power with a Wide Game Selection

Spartans has separated itself from the crowd by adopting crypto as its foundation, removing the banking delays and card restrictions that slow down other sites. Deposits and withdrawals are processed instantly using Bitcoin, Ethereum, Tether, USDC, Avalanche, and more. Wallet connections through MetaMask, Trust Wallet, or Coinbase Wallet make it easy to join and start betting within minutes. With over 43 providers and 5,900 games, Spartans offers slots, table classics, live dealer games, crash titles, and full sports betting within one account, saving players time and adding convenience.

The game collection is extensive, from high-volatility slot jackpots to blackjack, roulette, baccarat, and crash games where multipliers rise until they collapse. Live dealer and game-show formats replicate the feel of in-person play. On the sportsbook side, betting covers football, basketball, cricket, UFC, tennis, and eSports, with options for outright wins, totals, and in-play wagers supported by live stats. Combined with a smooth interface and streamlined betslip, players gain clear control over bets and payouts.

Spartans also backs this with strong bonuses. A 300% casino welcome bonus up to $200 is offered for new players, matched by a 300% sports bonus with fair wagering rules. A daily reload bonus of 25% adds routine value, while large promotions like the Lamborghini giveaway raise attention. Together with its crypto-first system, instant payouts, and wide betting options, Spartans sets the standard when ranking the best US online casinos.

2. BetMGM: Strong Results Backed by MGM

BetMGM is already widely known in the United States because of its link to MGM Resorts, and it continues to show steady results. New users can unlock up to $1,500 in bonus bets with the POSTBET code, which is among the bigger starting offers available. Its promotions include college football, the NFL, and even international leagues, while BetMGM Casino in the UK recently gave players a 100% match up to £200 plus free spins.

On the financial side, BetMGM reported $1.35 billion in net revenue for the first half of 2025, marking a 35% year-over-year rise. Online sports revenue increased by 56%, while iGaming revenue grew by 29%. Its full-year forecast has been lifted to $2.7 billion, showing confidence in growth. The company is refreshing its brand with the “Make It Legendary” campaign led by Jon Hamm, while also putting $250,000 into responsible gaming efforts and certifying thousands of advisors. BetMGM’s mix of scale and reputation keeps it strong among the best US online casinos.

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3. DraftKings: Record Numbers and Big Promos

DraftKings is growing fast with promotions and financial strength. For the NFL season, it launched the “Ghost Leg” parlay promo, allowing parlays with one wrong leg to still be graded as winners. New sign-ups betting $5 can also receive $300 in bonus bets plus more than $200 off an NFL Sunday Ticket subscription, adding real value for sports fans.

Its Q2 2025 report shows clear growth: revenue hit $1.51 billion, up 37% from last year, while net income reached $158 million. Average revenue per user climbed 29%, and adjusted EBITDA jumped 135% to $301 million. DraftKings now holds a 34.4% share of US sports betting, with analysts predicting a 14% upside to nearly $55 per share. It is also pushing responsible gaming, with Lori Kalani leading tools like betting dashboards and budget features. DraftKings remains important in the best US online casinos conversation, but its attention leans more toward sports than casino play.

4. BetRivers: Building on Poker and Casino Play

BetRivers, operated by Rush Street Interactive, is aiming for $1.05–$1.1 billion in 2025 revenue. The platform focuses on poker and casino growth, with events like $1 Satrolls and $20 Mega Satellites that connect to larger tournaments. Its poker network is expanding across Michigan, Pennsylvania, West Virginia, Delaware, and soon New Jersey, working to be the first five-state poker network. For casino fans, it offers PropPacks, which combine prop bets into themed sets for NBA and MLB action.

Players can join poker tournaments with 20% re-entry redemption, giving up to $100 in weekly value. Features like improved bet presets and streaming of the Sunday Main Event highlight its push into live poker. Though smaller than BetMGM or DraftKings, BetRivers still attracts those who want both poker and casino variety. It holds a place in the best US online casinos, though its rewards and scale are more limited compared to larger names.

Final Thoughts

All four names covered, Spartans, BetMGM, DraftKings, and BetRivers, provide strong reasons to join, whether through sportsbooks, casino options, or poker growth. BetMGM uses brand power, DraftKings drives sports promotions, and BetRivers builds depth in poker networks and themed events. Yet Spartans stands apart with its crypto-first system, instant payments, over 5,900 games, global sports betting, and promotions such as a Lamborghini giveaway. This mix of variety, speed, and features makes it unique.

For anyone looking at the best US online casinos, Spartans leads the way, built to give the most rewarding experience for those ready to play.

This article is not intended as financial advice. Educational purposes only.