ReliaQuest has raised over $500 million in funding on a $3.4 billion valuation.The funds will be used to advance AI-driven cybersecurity automation and support international expansion.ReliaQuest offers the GreyMatter security operations platform, which integrates with over 200 cybersecurity and enterprise tools.Using automation and AI capabilities, ReliaQuest claims customers can perform investigations 20 times faster and with 30% greater accuracy.