Chubb

Chubb dominates the US cyber insurance market with $2B+ in premiums, covering over 50,000 businesses across all sectors—more than any competitor on this list. Its 2016 ACE acquisition supercharged specialty lines, enabling bundled incident response retainers and pre-breach services that cut claim costs by an average of 18% compared to standalone policies. Outperforming #2 AIG by 33% in premium volume, Chubb's scale delivers 24/7 access to forensic and legal experts, reducing breach resolution time by 12 days versus the industry average.