AT&T Cybersecurity is a developer of commercial and open source services to manage cyber attacks, including the Open Threat Exchange, the world’s largest crowd-sourced computer-security platform. In July 2017, the platform had 65,000 participants who contributed more than 14 million threat indicators daily. The company has raised $116 million since it was founded as AlienVault in 2007. On July 10, 2018, it was acquired by AT&T Communications, becoming a wholly owned subsidiary when the transaction was completed on August 22, 2018. In February 2019, AlienVault was renamed AT&T Cybersecurity.