The proliferation of social media has created a terrorist finance vulnerability due to the ease with which propaganda can be spread, promoting fund-raising for a certain cause. Social media companies recognize the importance of preventing violent extremist and terrorist content, but less attention is paid to their fund-raising role. As well as presenting a threat, the movement of terrorist fund-raising activities online creates a disruption opportunity. This article argues that social media companies need to display greater awareness of their vulnerability to supporting terrorist financing and greater collaboration with law enforcement and financial institutions to strengthen the integrity of the system against abuse.