AI cybersecurity startup
Appears in 1 story · Last updated Oct 1, 2026
As of October 2026: Series E funded at $2B+ valuation, August 2026
Horizon3.ai crossed a $2 billion valuation August 3 with a $250 million Series E, tripling its valuation from $650 million in 14 months. The oversubscribed round, co-led by NightDragon and NEA, extended a run of large-check deals that began with Exaforce's $125 million Series B in May.
Updated Oct 1
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