That depends on what is meant by ‘cult’. By some definitions, Christianity, Islam, and Judaism are cults. By another definition, golfing, bowling, and surfing the Internet are cults. But in the usual use of the term, referring to a group that separates itself from society and its members from their non-member friends, demands slavish obedience from its adherents, engages in brainwashing techniques, confiscates their resources, and sees itself in opposition to established society, absolutely not!
Quite the opposite, in fact: Masonry does not recruit members, does not compel attendance at any of its meetings, charges modest dues and fees (some little changed for years), encourages community service and participation in civic and religious organisations, and allows any member to quit (demit) at any time (providing he has no outstanding financial obligations; otherwise, he is liable to be suspended, but in either case, he would no longer be a member). It is easier to get out of Masonry than it is to get into it!