MoneyThe story, in brief
Horizon3.ai raises $250M at $2B-plus valuation for autonomous pentesting
$250M. Horizon3.ai just tripled its valuation in 14 months—autonomous pentesting is suddenly a $2B+ category.
The KeyNews take
Why it matters
Autonomous security testing is attracting serious venture capital and enterprise deployment; practitioners need to track this as both a capability shift (agents doing security work) and a market signal about where AI operations are heading.
The key facts
6 to knowSeries E: $250M at $2B+ valuation
Series D (June 2025): $650M valuation
3x valuation increase in 14 months
NodeZero platform: autonomous pentesting agent
Expansion into Australia and Singapore
Use case: autonomous security attack/testing at scale
Go to the source
SiliconAnglesiliconangle.com
Publisher excerpt: Autonomous security solutions startup Horizon3.ai Inc. today announced it has raised $250 million in a Series E round on a valuation of more than $2 billion to build out its sales operation and expand into Australia and Singapore. Horizon3.ai closed its Series D in June 2025 at a valuation of $650…