largest online us poker companies
Biggest Online Poker Rooms as of April 2017. Pokerstars.com has the largest player base by a long shot. Despite Closing its doors to US players on April 15, 2011, Pokerstars is still the largest online poker room in the world by far and will probably remain that way for a while at least. Their future looks fairly solid as a world-wide brand, but is up in the air at this point.