The move follows Jackpotjoy's appointment of Campbell Lace Beta to handle its advertising account after a pitch against Publicis in July.
Goodstuff, which pitched in conjunction with Campbell Lace Beta, was appointed to handle its communications planning at the same time.
Gamesys, the owner of Jackpotjoy, kicked off its media and creative review for the brand in May. It was led by Jackpotjoy's marketing director, Lee Fenton.
The agencies will work to create campaigns that aim to encourage new players to visit the Jackpotjoy site.
The site has produced several games based around TV game shows such as Deal Or No Deal, The Price Is Right, Strike It Lucky and Family Fortunes to run alongside its bingo and casino games.
Jackpotjoy offers more than 70 games separated into seven categories – new games, multi-line slots, top games, instants, classic slots, casino games and bingo.