Twenty

Cybersecurity · Defense Tech · Artificial Intelligence

Funding

Twenty raises $100M Series B at $1B valuation, led by Accel

The offensive cyber startup joins the billion-dollar club less than two years after founding, as Washington pushes for faster, AI-driven cyber deterrence.

• Twenty raised a $100 million Series B at a $1 billion valuation, led by Accel with participation from Friends & Family Capital, Point72 Ventures, and Caffeinated Capital.
• Founded in 2024, Twenty describes itself as the first VC-backed cyber warfare startup in the U.S., building AI-enabled offensive cyber systems for the American military and Intelligence Community.
• The round brings Twenty's total funding to $138 million; the company says it will pour the new capital directly into research and engineering.
• Twenty's CEO Joe Lin says the systems are built to keep human judgment central, pairing AI and automation with controlled deployment and mission alignment rather than fully autonomous operation.
• Accel partner Jonathan Turner called Twenty "the clear leader in this market," citing the team, mission urgency, and operational relevance reached at a pace rare in defense technology.
• The raise lands amid a broader wave of AI-driven defense and cyber mega-rounds, including Germany's Helsing at $1.8B (Series E, $18B valuation) and Cyera's $600M round at a $12B valuation.
• Twenty's rapid ascent to unicorn status reflects how U.S. policy urgency around offensive cyber operations is now pulling commercial venture capital into a domain once reserved for classified government contractors.