The group and its founder Gavin McInnes were removed from Facebook and Instagram, the social network confirmed, highlighting its policies on hate groups.
"Our team continues to study trends in organized hate and hate speech and works with partners to better understand hate organizations as they evolve," a Facebook spokesperson said in an emailed statement.
"We ban these organizations and individuals from our platforms and also remove all praise and support when we become aware of it. We will continue to review content, Pages, and people that violate our policies, take action against hate speech and hate organizations to help keep our community safe."
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The Proud Boys' main US page and McInnes' personal page are offline, but some smaller pages linked to the group are still up at time of writing.