Network Management Software · Dover, DE · Founded 2019 · Privately Held (backing)
Developer of a security automation platform designed to perform autonomous penetration testing and operational security assessments. Horizon3.ai is based in Dover, DE and was founded in 2019. It was valued at $660 million at its later-stage round in May 2025, the last priced event on record. It has raised $184 million across 1 recorded round; the latest was a $100 million Series D in May 2025.
PMV mark · valuation
$660.0M
Oct 2026
Priced at
its later-stage round
May 2025
Total raised
$183.5M
Last round
Later Stage VC (Series D)
May 2025
Cap table — not yet on record
Horizon3.ai's share-class structure hasn't surfaced in our sources yet. Cap tables are assembled from certificates of incorporation, round filings, and disclosures as they land.
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·The complete investor list: 13 names
·Watch Horizon3.ai: the Monday email on marks, rounds and moves
