Horizon3, whose AI penetration testing platform NodeZero helps find and exploit attack paths in production systems, raised a $250M Series E at a $2B valuation (Kate Park/TechCrunch)

<a href="https://techcrunch.com/2026/08/03/horizon3-hits-2-billion-valuation-with-250m-series-e-as-ai-threats-escalate/"><img align="RIGHT" border="0" hspace="4" src="http://www.techmeme.com/260803/i19.jpg" vspace="4" /></a> <p><a href="https://www.techmeme.com/260803/p19#a260803p19" title="Techmeme permalink"><img height="12" src="http://www.techmeme.com/img/pml.png" style="border: none; padding: 0; margin: 0;" width="11" /></a> Kate Park / <a href="http://techcrunch.com/">TechCrunch</a>:<br /> <span style="font-size: 1.3em;"><b><a href="https://techcrunch.com/2026/08/03/horizon3-hits-2-billion-valuation-with-250m-series-e-as-ai-threats-escalate/">Horizon3, whose AI penetration testing platform NodeZero helps find and exploit attack paths in production systems, raised a $250M Series E at a $2B valuation</a></b></span>&nbsp; &mdash;&nbsp; Cybersecurity startup Horizon3 has raised a $250 million Series E at a $2 billion valuation, more than tripling its valuation in 14 months.</p>