The sponsorship agreement will see a share of the money bet on Football League matches go towards participating clubs, which means over 80 teams will benefit when a fan places a bet.
Bet Butler offers fans the best available odds from more than 60 different bookmakers.
Football League chief commercial officer, Richard Heaselgrave said: “This is a really innovative partnership that delivers a fantastic win-win situation for supporters. They will get the best odds in the marketplace and their club will benefit directly from their betting activity.”
Chris Bell, chairman of Bet Butler, added: “I am delighted by this deal that benefits both football league clubs and supporters. It is a marvellous endorsement of our unique technology which will offer the fans the best available price, but also deliver an important revenue stream for their club.”