LevelBlue

LevelBlue delivers managed detection and response, managed cloud and network security, incident response, and cyber advisory services, drawing on more than a thousand security consultants, threat hunters, and forensic investigators plus its SpiderLabs threat intelligence research team. The company positions itself as the world’s largest pure-play managed security services provider, integrating with major technology partners including Microsoft, SentinelOne, Zscaler, and Palo Alto Networks rather than building all detection technology in-house.

LevelBlue was formed in 2024 when AT&T spun off its AT&T Cybersecurity business (which had earlier acquired AlienVault) into a new company majority-owned by WillJam Ventures, with AT&T retaining a minority stake. That heritage gives LevelBlue decades of accumulated threat telemetry and a large existing customer base, but as a large, carrier-spun-off MSSP, its disruption potential is scored conservatively relative to newer, more architecturally novel entrants.