Horizon3.ai

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
What is Horizon3.ai worth?
$660.0MPrivateMarketView mark · Oct 2026

Valued at $660.0M at its later-stage round, May 2025. Nothing has traded since.

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Valuation timeline

0 priced rounds · 32 daily marks since · Sep 2026 – Oct 2026
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Markrounds hold their value until the next priced eventMark, today
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Horizon3.ai funding history

1 rounds
DateRoundRaisedPost-money
May 2025Later Stage VC (Series D)$100.0M▮
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Horizon3.ai valuation

Horizon3.ai was valued at $660 million at its later-stage round in May 2025. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.

How much has Horizon3.ai raised?

Horizon3.ai has raised $184 million in total; 1 of its rounds is on record. The largest on record was a $100 million Series D in May 2025.

Comparable companies

Comparable network management software names by valuation on PrivateMarketView: Druva ($773 million), Endor Labs ($635 million) and Virtru ($500 million).

How Horizon3.ai's valuation is determined

Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.

For Horizon3.ai, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by its last priced round. Question about this number? Full methodology →

Frequently asked about Horizon3.ai

What is Horizon3.ai worth?
Horizon3.ai is valued at $660.0M as of Oct 2026. Valued at $660.0M at its later-stage round, May 2025. Nothing has traded since.
How much has Horizon3.ai raised?
Horizon3.ai has raised $183.5M in total funding across 1 recorded rounds.
When did Horizon3.ai last raise?
Horizon3.ai last raised in May 2025 (Later Stage VC (Series D)), raising $100.0M.