Technological Backbone of Major US Sports Betting Operators

In the hyper-competitive US iGaming market—now valued at over $15 billion in annual handle as of late 2025—major operators like FanDuel, DraftKings, BetMGM, Caesars, and Fanatics rely on robust core host platforms to manage everything from odds compilation and risk hedging to player account management (PAM) and seamless omnichannel delivery. These platforms aren’t just software stacks; they’re mission-critical infrastructures that enable sub-second latency during peak events like Super Bowl Sunday, where volumes can spike 10x normal traffic. Traditional providers like OpenBet, Amelco, Kambi, and Entain (via BetMGM) dominate, often blending proprietary customizations with third-party integrations for geo-specific compliance and personalized betting experiences.

As states like Missouri and North Carolina join the fold in 2025, operators are doubling down on scalable, API-rich platforms to accelerate market entry and optimize hold percentages amid razor-thin 4-6% margins. Below, we break down the key providers, their flagship offerings, and the marquee US clients powering the industry’s top handles.

OpenBet: The Enterprise Workhorse for High-Volume Scalability

A modular powerhouse for enterprise-scale operators, OpenBet excels in customizable pricing engines and seamless integration with third-party feeds. Its strength in handling high-volume in-play markets makes it a staple for global sportsbooks. Acquired by Endeavor in 2022 and later spun out via management buyout in 2025, OpenBet’s cloud-native architecture supports 100% uptime during marquee events, processing over 140 million bets during Euro 2024. Key features include AI-driven anomaly detection, dynamic line movement, and modular PAM for hybrid retail-online ops.

Major US Clients:

FanDuel (Flutter Entertainment): OpenBet powers FanDuel’s core sportsbook across 20+ states, enabling its market-leading same-game parlay (SGP) builder and live betting suite.

Caesars Sportsbook: Leverages OpenBet for its primary trading desk and odds management platform, enhanced by recent acquisitions like ZeroFlucs for advanced SGP tech in 2024. This setup supports Caesars’ loyalty-driven model, integrating Caesars Rewards across digital and 50+ retail venues.

OpenBet’s US footprint extends to lotteries and emerging partners, OB claims to be in position for 40%+ YoY client growth in 2026.

SBTech (DKNG Proprietary): Vertically Integrated Dominance

SBTech, acquired by DraftKings in a $2.2 billion SPAC merger in 2020, has evolved into the operator’s in-house powerhouse, rebranded as the DraftKings Platform. This end-to-end solution—encompassing Chameleon360 iGaming, managed trading services, and omnichannel retail—powers DraftKings’ 30%+ US handle share, with proprietary ML models for personalized odds and micro-betting. Post-acquisition, it ditched third-party dependencies like Kambi, focusing on vertical integration for faster iteration and cost efficiencies

Major US Client:

DraftKings Sportsbook: Self-powered across all 25+ states, excelling in DFS-to-sportsbook convergence with features like Dynasty Rewards and live streaming embeds. In 2025, enhancements include blockchain-verified parlays, boosting CLV by 15% in high-engagement cohorts.

This model exemplifies the “build vs. buy” shift, with DraftKings now licensing elements to smaller operators for ancillary revenue.

Kambi: Turnkey Reliability for Regional Powerhouses

Kambi’s sportsbook-as-a-service model delivers proven, white-label solutions with Odds Feed+ for customizable trading and compliance baked in. With 15+ years in regulated markets, it’s the go-to for operators prioritizing quick launches and low-latency feeds, powering 10% of US online handle via tribal and boutique partnerships.

Major US Clients:

BetRivers (Rush Street Interactive): Kambi underpins BetRivers’ East Coast dominance, with iRush Rewards integration.
Bally Bet and Churchill Downs (TwinSpires): Extended multi-year deals in 2025 to ensure retail-online synergy in KY and IN, with optical tracking for horse racing props.
Tribal Operators (e.g., Desert Diamond in AZ): Serves nine states with tailored integrity monitoring.

Kambi’s 2025 revenue hit €176M / $207M USD, buoyed by US/Brazil expansions despite client churn from to proprietary in-house shifts.

Entain Platform: Legacy Scale with Modern Overlays (BetMGM)

Entain plc serves as BetMGM’s core host, specifically leveraging the parent’s U.S.-licensed BWin technology stack— serving customers across 30+ global markets. This infrastructure integrates player account management (PAM), compliance tools, and real-time personalization, supporting BetMGM’s hybrid casino-sportsbook model. A key enhancement in recent years has been incorporation of Angstrom Sports technology, acquired by Entain in 2023 and intending to supercharge U.S. OSB product innovation.

Now embedded within Entain’s ecosystem, Angstrom powers enhanced parlay combinability, consistent pre-live and live betting experiences, and expanded player props offerings—delivering measurable uplifts in engagement and handle while reducing third party revenue sharing agreements with Sportscast. This integration has contributed to BetMGM’s solid 2025 performance, including H1 net revenue of $1.35 billion (up 35% YoY) and EBITDA of $109 million, alongside upgraded full-year guidance of at least $2.7 billion in revenue (28% growth) and $150 million in EBITDA, meaningfully driven by BetMGM casino.