Game Developer & Slot Studio

• OP

  Openlot Systems B.V.

  Netherlands

  Openlot Systems B.V. is a Netherlands-based iGaming technology provider that has been operating since 2002. The company supplies a broad range of software solutions covering the major verticals of online gambling: casino games, bingo, live dealer experiences, poker, and sportsbook platforms. While the company does not maintain a publicly accessible corporate website or disclose its current leadership, its long-standing presence in the industry is evidenced by a listing on igamingsuppliers.com and past participation in the ICEi 2010 tradeshow. The company is structured as a Dutch private limited company (B.V.), suggesting it may be privately held and operating with a lower public profile. Although a separate entity called Openlot Ventures (openlot.com) exists as a private equity firm focused on technology investments, no official corporate relationship between the two has been confirmed. Openlot Systems B.V. appears to target a B2B client base, providing white-label or platform-based gambling software to operators. The company's longevity—over two decades—suggests it has established some degree of industry trust and client retention, though detailed operational or financial data remains undisclosed.

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  ONEworks Limited

  Castletown, Isle of Man

  ONEworks Limited is a privately held sportsbook software provider headquartered in Castletown, Isle of Man, with a registered presence in the United Kingdom. Founded in 2000, the company specializes in the development and delivery of customizable sports-betting platforms and turnkey wagering solutions. Its core product, the ONEbook platform, has been refined for over a decade and offers extensive pre-match and in-play markets, including over 5,000 soccer events and 18,000 markets. ONEworks serves licensed operators targeting international, European, and Asian markets, and provides integration services for third-party or proprietary systems. The company’s headcount is disputed: LinkedIn reports 51-200 employees, while RocketReach reports 22 and Companies House micro-company accounts imply fewer than 10 for the registered entity. Despite the size uncertainty, ONEworks positions itself as a flexible technology partner with a client base spanning multiple regions and a reputation for timely delivery and strong support.

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  OneAdvanced

  Birmingham, West Midlands, United Kingdom

  OneAdvanced Group Limited is a British private enterprise software and cloud computing company headquartered in Birmingham, UK. Founded in 2008 by Vin Murria, the company supplies business software and outsourced IT services to organisations in highly regulated sectors including health and social care, education, legal services, social housing, distribution and logistics, government, and commercial services. Originally listed on AIM as Advanced Computer Software, it was taken private by Vista Equity Partners in 2014 and later sold a 50% stake to BC Partners in 2019, with both firms now jointly owning the business. After a 2023 strategy refresh, the company rebranded to OneAdvanced and launched its 'Intelligent System of Work' platform that embeds AI, data analytics, and common services into customer operations. OneAdvanced employs around 2,900 people and serves millions of end-users daily, including managing 1.5 million NHS 111 calls per month and supporting over 2 million learners. In January 2024, it sold its application modernisation division to IBM. The company reported revenue of £346 million in 2024.

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  OMI Gaming

  Sweden

  OMI Gaming is a Swedish video slot studio founded in 2017 that pivoted from a development consultancy to a dedicated in-house game developer by late 2017. The company focuses on creating high-end, triple-A mobile and multi-platform casino games with solid mathematical modelling, embodied in its tagline “Proper games, solid maths.” Its portfolio includes three confirmed titles—Polar Wilds™, Lucky For You™, and The Cheshire Tree™—each featuring innovative mechanics such as Arctic Circles, supermeter games, row expansions, and high volatility. The studio is privately held and led by founder and CEO André Orefjärd. No licensing jurisdictions, partnerships, or funding rounds have been publicly disclosed, and headcount remains unknown, suggesting a small, early-stage operation. The company’s online footprint is minimal, with only its official website and a single startup listing providing verifiable information.

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  ODDSworks Inc.

  Downers Grove, Illinois, USA

  ODDSworks Inc. is a privately held iGaming technology company based in Downers Grove, Illinois, founded in 2020 by Shridhar Joshi. The company specializes in Remote Gaming Server (RGS) technology and interactive content for regulated online gambling markets across North America. Its core platform, BETguard, is a certified game server that supports progressive jackpots, free spins, and bonusing tools, while the O-Connect aggregation layer enables distribution of proprietary and third-party games. ODDSworks’ game portfolio includes video slots, video poker, table games, and scratch-offs. The company has secured licenses in Connecticut, New Jersey, Michigan, Pennsylvania, West Virginia, Ontario, and Quebec, and has formed partnerships with major operators such as Caesars Entertainment and FanDuel. With over 100 years of combined gaming experience among its leadership, ODDSworks raised approximately $2.4 million in seed funding as of 2025. The company continues to expand its North American footprint through strategic partnerships and technology innovation.

• ON

  On Air Entertainment

  Conshohocken, Pennsylvania, USA

  On Air Entertainment™️ is a privately held live casino studio founded in December 2020 and headquartered in Conshohocken, Pennsylvania. The company positions itself as an architect of “live casino magic,” providing gaming operators with immersive live dealer games and game shows. Its offering encompasses state-of-the-art user interface design, custom digital environments, animations, and proprietary streaming technology. On Air Entertainment describes itself as guided by seasoned industry experts and aims to rewrite the story of live casino entertainment by helping operators craft their ultimate live casino experience. The company operates within the iGaming technology space, focusing on creating wonder-driven, interactive experiences for online casinos. According to its LinkedIn profile, the company employs between 501 and 1,000 people and is classified under IT Services and IT Consulting. While On Air Entertainment does not publicly list its specific products or platforms on the available source, its core business revolves around the development and delivery of live casino content and technology solutions. The company continues to expand its footprint in the competitive live casino segment, targeting operators looking to differentiate their offerings with high-quality, immersive digital environments and streaming capabilities.

• OL

  Old Skool Studios

  North Vancouver, British Columbia, Canada

  Old Skool Studios is a Canadian slot game developer founded in 2009 and headquartered in North Vancouver, British Columbia. The studio operates exclusively as a content partner to Games Global, distributing its premium video slot titles through that aggregation platform to tier‑1 online casino operators worldwide. Its portfolio is built around feature‑rich slots with distinctive themes, often inspired by retro aesthetics and pop culture. Notable games include Jokerizer, Rise of the Dead, and Mystic Joker. Despite being active since 2009, the company maintains an unusually low public profile — it has no accessible website, no confirmed leadership publicly listed, and only minimal social media presence. The studio’s games are built on HTML5, certified for regulated markets like the UK and Malta, and typically offer return‑to‑player rates between 96% and 97%. The team is believed to be small, typical of a specialised content studio, and the business relies entirely on its exclusive distribution deal with Games Global to reach operators such as LeoVegas and 888casino.

• OG

  OG - Oriental Game

  Makati, Metro Manila, Philippines

  OG – Oriental Game (commonly known as Oriental Game) is a Philippine-based B2B live dealer and iGaming solutions provider that has become one of the fastest-growing suppliers in Asia. Founded in 2014 and headquartered in Makati, Metro Manila, the company holds interactive gaming licenses from both PAGCOR and First Cagayan Leisure and Resorts Corporation, giving it regulatory credibility across the region. Its core offering is a live dealer platform that streams real-time table games such as baccarat (in multiple rule variants), fan-tan, sic-bo, and roulette from professional studios, with multilingual support for Mandarin, English, Japanese, and other languages. Beyond live dealer, Oriental Game provides white-label casino solutions, a sportsbook for live and pre-match betting, and a unified API that aggregates over 2,000 games—including third-party slots and digital content—for seamless integration into operator platforms. The company employs between 501 and 1,000 people, according to its LinkedIn page, reflecting the scale required to operate multiple live dealer studios and support a comprehensive B2B product suite. Despite its rapid growth and wide reach, Oriental Game maintains a low public profile, with no named executives or significant press coverage publicly available.

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  Odds and More

  St. Francis Building, Ball Street, Paceville, Saint Julian's, Malta

  Odds and More is a B2B technology provider specializing in pre-match sportsbook trading and analysis platforms for licensed operators. The company offers a complete, data-centric solution that manages the full lifecycle of pre-match operations, including event creation, odds calculation, real-time monitoring, and reporting. Its platform, branded as Odds+More, collects and processes sports data across all major leagues to deliver rapid, reliable odds updates. The company positions itself as a streamlined alternative for operators seeking to avoid building in-house infrastructure. Despite a functional web presence and LinkedIn page, publicly available information about Odds and More is extremely scarce—no founding year, headquarters, headcount, or executive names have been independently confirmed. The company appears to be a small, privately held vendor operating in the crowded sportsbook technology space, likely serving tier-2 or emerging operators. Its low profile suggests it may be an early-stage or highly regional player, and no client references, case studies, or industry recognition are publicly available. The platform integrates with existing player account management systems or functions as a standalone module, targeting operators who want a focused pre-match odds management tool.

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  Nuxgame

  Willemstad, Curaçao

  NuxGame is a B2B iGaming software provider founded in 2018 that delivers comprehensive platform solutions for online casino and sportsbook operators worldwide. The company offers both turnkey and API-based solutions, including a game aggregator with over 17,500 games from more than 140 providers, a sportsbook covering 370,000+ annual events, and specialized products such as crypto casino, sweepstakes casino, and Telegram casino software. Headquartered in Willemstad, Curaçao, NuxGame employs over 200 people across two offices and serves more than 100 clients globally. The platform supports 180+ currencies and provides additional services like AML/KYC solutions, affiliate marketing tools, and legal compliance consulting. NuxGame has received significant industry recognition, including a SiGMA Awards 2025 Best Platform Provider win and EiGE Awards 2025 wins for Best Innovation in iGaming Technology and Best Marketing Campaign. The company operates as a privately held entity focused on scalability, rapid deployment, and 24/7 support, with a leadership team that includes Daniel Heywood as CEO and a tight executive group covering product, marketing, business development, revenue, and finance.

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  Octavian.SPb

  Saint Petersburg, Russia

  Octavian.SPb is the Saint Petersburg-based development arm of the international Octavian group, a long-standing supplier of gaming systems and software for casinos, AWP machines, lotteries, and emerging markets worldwide. The group traces its modern software house structure to 2006 in Italy, with additional offices including Octavian Game Art Ltd. in Russia. Octavian.SPb specifically houses the 2D graphics and game art teams responsible for creating the visual assets and user interface components of the group’s proprietary game portfolio. Core products include a full B2B online casino platform, a proprietary game engine, an aggregation hub integrating over 80 providers, and a land-based SDK for the Italian AWP market. Octavian’s solutions are certified in Italy, Spain, Portugal, Brazil, and Mexico, with ongoing expansion across Latin America. The group employs 51–200 people globally, though the exact headcount of the Saint Petersburg studio is not publicly disclosed. No specific leadership for Octavian.SPb itself could be confirmed; all executive functions are based in Italy.

• OF

  OffsideGaming

  London, United Kingdom

  Offside Gaming is a privately held, independent B2B platform provider that has been delivering sports betting and casino solutions since its founding in 2008. Headquartered in London, the company employs approximately 201–500 people and supplies its technology to licensed operators worldwide. Its core offering is a modular, fully-managed sportsbook platform that processes over 35,000 live sporting events per month and includes features such as bet builder, cash out, and live streaming. In addition, Offside Gaming operates a casino aggregator offering 3,000+ games – including slots, live dealer tables, and virtual sports – from multiple third-party studios. Solutions can be deployed as a full turnkey operation or as plug-in modules, giving operators flexibility in how they integrate betting and gaming content. The company emphasises high gross gaming revenue (GGR) for its clients and cites advanced intelligence within its platform as a driver of player lifetime value. Recent news indicates that in 2025 Offside Gaming formed a strategic partnership with 7777 gaming to launch into Latin American brands, signalling ongoing expansion efforts. While the company maintains a low public profile, its longevity (over 15 years) and substantial client GGR suggest a well-established position in the iGaming supply chain.