Ainsworth is the second largest slot developer in the world and this success is largely due to its founder and director, Len Ainsworth. Len Ainsworth has a long history in the slot sector and in 1953 he founded the also supplier of slot software Aristocrat. Both casino software developers are listed on the Australian stock exchange and, in addition to having a headquarters in this country, Ainsworth currently has offices in the United States and Europe after its great process of expansion into international markets. For many years, Ainsworth focused on live slots almost exclusively, although recently he has also made the leap to online slots and operates in many casinos in different countries, such as the United States.