Onyx Security
PrivateLast Round
Series B
Jul 29, 2026
Est. Valuation
$640M
Total Funding Raised
$153M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
Onyx Security operates in Cybersecurity and is based in New York City, New York. Its latest recorded funding round was a Series B round in July 2026.
Onyx Security is a cybersecurity company that provides a secure AI control plane for enterprises to discover, monitor, and govern autonomous AI agents.
Sector
Cybersecurity
Verticals
Application Security, Data Governance, Vulnerability Management, Compliance & Risk
Business Model
B2B
Customer Profile
Subscription SaaS
AI Layer
Infrastructure
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Onyx Security Comparables
Compare Onyx Security with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Noma Security | 94% | |
| WitnessAI | 84% | |
| Cranium | 82% |
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Onyx Security Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | Jul 29, 2026 | ||||
| Series A | Mar 12, 2026 | ||||
| Seed | Jun 27, 2024 |
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Key People
Founding team and executive leadership
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Onyx Security Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Cyberstarts | Series B, Series A, Seed |
| Vintage Investment Partners | Series B |
| Conviction | Series B, Series A |
| FirstMark Capital | Series B |
| TCV | Series B |
| Bessemer Venture Partners | Series B |
| G Squared | Series B |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 22, 2026
Monthly visitors increased 54% MoM.
- Aug 16, 2026
Grew 20% QoQ, from 83 to 100 employees.
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Onyx Security Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
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Frequently Asked Questions
Common questions about Onyx Security's valuation, stock price, and market status.
Is Onyx Security a public or private company?
Onyx Security is a private company.
What is the current stock price of Onyx Security?
Onyx Security is a private company, so its shares have no public market price. Caplight tracks Onyx Security's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Onyx Security worth (valuation)?
Onyx Security's valuation is estimated at $640.0M based on funding round data.
Can I buy Onyx Security stock?
Onyx Security shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Onyx Security's last funding round?
Onyx Security's most recent funding round was Series B on July 29, 2026.
Who are the main investors in Onyx Security?
Key investors in Onyx Security include Cyberstarts, Conviction, Bessemer Venture Partners.
Will Onyx Security IPO soon?
No public IPO plans have been announced for Onyx Security.
How can I track Onyx Security secondary market activity?
Caplight tracks bids, offers, and trades in Onyx Security's shares on secondary markets.