Arkadium is a developer of casual browser-based games, which are hosted on its own website, Arkadium.com, as well as across a network of digital publishers including USA Today and The Washington Post and Microsoft's Zone.com. The company is headquartered in New York City, with an additional office in Lisbon, Portugal.

Kenny Rosenblatt and Jessica Rovello founded Arkadium in 2001, inspired by a game of Ms. Pac-Man. Arkadium developed the Microsoft Solitaire Collection in 2011 as well as the modern iteration of Minesweeper.

In 2014, after the Russian annexation of Crimea, the US put sanctions on companies operating there. Arkadium had a 100-person team in Crimea, which was reduced to 50 and relocated from that region.

In January 2017, the company announced it signed 300 new publishers in 2016 and saw record growth, and in 2019 announced a partnership with Sportradar to make it easy to bet on sports trivia questions to make web-based content more interactive and engaging for fans.

In September 2018, Arkadium used its profits to buy out the investors, allowing the company to remain independent and grow on its own terms. CEO Jessica Rovello said she had no regrets about stepping off the venture-funded path. Arkadium games were played 830 million times in 2018.

In 2024, Arkadium introduced Arkadium for Developers, opening its distribution network to developers worldwide with a 75% revenue-sharing model. Later that year, the company launched its third-party publishing initiative, APF1, a $1 million fund designed to support external game developers through publishing opportunities.

Arkadium is managed by CEO and Co-Founder Kenny Rosenblatt.

The company reaches over 25 million users each month^[vague] across Arkadium.com and its network of gaming sites. Its hit games games include the Word Wipe, Mahjong Dimensions, Outspell, and Hurdle and its collection of Card and Crossword Titles. Arkadium also developed the Microsoft Solitaire Collection which comes loaded on Windows 10, Windows 8, and mobile devices.