Patronus AI
PrivateLast Round
Series B
Jun 25, 2026
Est. Valuation
$400M
Total Funding Raised
$70M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
Patronus AI operates in AI, Data & Cloud Infrastructure and is based in San Francisco, California. Its latest recorded funding round was a Series B round in June 2026.
Patronus AI provides frontier AI labs with training data, tasks, and simulated environments for reinforcement learning. Its work spans reinforcement learning environments and digital world models for agents operating in software.
Sector
AI, Data & Cloud Infrastructure
Verticals
NLP & Conversational AI, Application Security, Compliance & Risk, ML Platforms, Data Governance
Business Model
B2B
Customer Profile
Subscription SaaS, Usage-Based SaaS
AI Layer
Infrastructure
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Patronus AI Comparables
Compare Patronus AI with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Galileo | 88% | |
| Virtue AI | 87% | |
| Braintrust | 86% |
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Patronus AI Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | Jun 25, 2026 | ||||
| Series A | May 22, 2024 | ||||
| Seed | Sep 14, 2023 |
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Key People
Founding team and executive leadership
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Patronus AI Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Factorial Capital | Series A, Series B, Seed |
| Notable Capital | Series B, Series A |
| Greenfield Partners | Series B |
| Samsung Next TLV | Series B |
| Samsung NEXT Fund | Series B |
| Samsung Venture Investment | Series B |
| Lightspeed Venture Partners | Series A, Series B, Seed |
Market signals
Structured signals derived from secondary market and firmographic data.
- Sep 23, 2026
Grew 22% QoQ, from 59 to 72 employees.
- Aug 7, 2026
Launched Humanity's Last Exam for AI evaluation research.
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Patronus AI 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 Patronus AI's valuation, stock price, and market status.
Is Patronus AI a public or private company?
Patronus AI is a private company.
What is the current stock price of Patronus AI?
Patronus AI is a private company, so its shares have no public market price. Caplight tracks Patronus AI's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Patronus AI worth (valuation)?
Patronus AI's valuation is estimated at $400.0M based on funding round data.
Can I buy Patronus AI stock?
Patronus AI shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Patronus AI's last funding round?
Patronus AI's most recent funding round was Series B on June 25, 2026.
Who are the main investors in Patronus AI?
Key investors in Patronus AI include Notable Capital, Greenfield Partners, Lightspeed Venture Partners.
Will Patronus AI IPO soon?
No public IPO plans have been announced for Patronus AI.
How can I track Patronus AI secondary market activity?
Caplight tracks bids, offers, and trades in Patronus AI's shares on secondary markets.