Prompt Security
Prompt Security is a cybersecurity company specializing in AI Security, founded in 2023 and headquartered in New York, United States. It has raised $23M in equity across 2 priced rounds, employs about 42 people, and was acquired by SentinelOne in 2025.
updated Oct 11, 2026
Latest Prompt Security news and company activity
What Prompt Security did, dated — selected moves from the record, one per kind, newest first.
- Sep 2026Feature launchSentinelOne brings Prompt Security to AWS Sydney for AI sovereignty
- Aug 2026PartnershipSentinelOne Expands Collaboration with AWS to Deliver Unified AI Governance
- Jul 2026RecognitionPrompt Security Recognized as Top Cybersecurity Product
- Aug 2025AcquiredSentinelOne Acquires AI Startup Prompt Security for $250M
Prompt Security funding
Prompt Security has raised $23M in priced equity. Its most recent round was a Series A in November 2024.
- Equity raised
- $23M2 priced rounds
- Last round
- Series ANov 2024
Prompt Security employees and hiring
Prompt Security competitors
Security professionals most often compare Prompt Security against F5 and Magier AI on cybersectools.com. The full competitive set, with overlap scoring, is in the platform.
ranked by CybersecTools comparison demand, 90 days
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The other 440 data points.
- Funding historyevery round, every investor named
- Headcount growthvelocity, departments, seniority
- Open jobslive postings, hiring pace, role mix
- Tech stackframeworks, clouds, security
