PromptArmor
PrivateLast Round
Seed
Apr 1, 2024
Total Funding Raised
$3M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
PromptArmor operates in Cybersecurity and is based in San Francisco, California. Its latest recorded funding round was a Seed round in April 2024.
PromptArmor is a cybersecurity company that develops a risk management and security platform for Large Language Models (LLMs) to protect enterprises against threats such as adversarial inputs, data exfiltration, and prompt injections.
Sector
Cybersecurity
Verticals
Compliance & Risk, Application Security, Threat Intelligence
Business Model
B2B
Customer Profile
Subscription SaaS, Services & Consulting
AI Layer
Infrastructure
Historical Pricing
Historical view of private secondary pricing and transaction trends.
PromptArmor Comparables
Compare PromptArmor with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Pillar Security | 83% | |
| Cranium | 81% | |
| Lasso Security | 79% |
For institutional investors. Book with your work email.
PromptArmor Funding Rounds
Historical fundraising activity
For institutional investors. Book with your work email.
PromptArmor Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Pioneer Fund | Seed |
| Ritual Capital | Seed |
| Litquidity Ventures | Seed |
| Intuit Ventures | Seed |
| Kindred Ventures | Seed |
| Seven Seven Six | Seed |
| Afore Capital | Seed |
For institutional investors. Book with your work email.
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 25, 2026
Grew 25% QoQ, from 16 to 20 employees.
- Aug 1, 2026
Added Ropes & Gray LLP as a customer.
For institutional investors. Book with your work email.
PromptArmor 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.
Book a demoFor institutional investors. Book with your work email.
Frequently Asked Questions
Common questions about PromptArmor's valuation, stock price, and market status.
Is PromptArmor a public or private company?
PromptArmor is a private company.
What is the current stock price of PromptArmor?
PromptArmor is a private company, so its shares have no public market price. Caplight tracks PromptArmor's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is PromptArmor worth (valuation)?
Valuation information for PromptArmor is not publicly available.
Can I buy PromptArmor stock?
PromptArmor shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was PromptArmor's last funding round?
PromptArmor's most recent funding round was Seed on April 1, 2024.
Who are the main investors in PromptArmor?
Key investors in PromptArmor include Y Combinator.
Will PromptArmor IPO soon?
No public IPO plans have been announced for PromptArmor.
How can I track PromptArmor secondary market activity?
Caplight tracks bids, offers, and trades in PromptArmor's shares on secondary markets.