Prompt Security
Prompt Security provides an enterprise AI security platform protecting organizations against generative AI risks across employee GenAI usage, homegrown LLM apps, AI code assistants, and agentic AI workloads. Founded 2023 in Israel; acquired by SentinelOne in 2025 for ~$250 million.
- Company typePrivate
- Founded2023
- HeadquartersNew York, United States
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What Prompt Security does
Prompt Security is an enterprise AI security company founded in August 2023 in Tel Aviv, Israel, by Itamar Golan (CEO) and co-founders. The company provides a unified, LLM-agnostic platform that delivers end-to-end visibility, protection, and governance across the four primary enterprise GenAI touchpoints: employee use of consumer and Saa-side GenAI tools (shadow AI discovery, data redaction, user coaching), homegrown LLM-backed applications (prompt-injection and jailbreak defense), AI code assistants such as GitHub Copilot and Claude Code (secret exposure and code sanitization), and agentic AI workloads routed through the Model Context Protocol (MCP). The platform combines a browser-extension inspection layer, eBPF-based kernel-level telemetry (claimed as the first no-code offering for LLM applications), a dynamic GenAI detection engine, stateful multi-turn threat detection, automated AI red-teaming, and a proprietary MCP Gateway, delivered as cloud SaaS or self-hosted. Supporting offerings include the open-source Prompt Fuzzer, the AI Risk Assessment Tool, OneClaw for agent observability, and ClawSec for agent protection.
The company's go-to-market combines direct enterprise field sales (demo-led, quote-based annual subscription) with industry-tailored solutions for Healthcare and Finance & Insurance, a community/devrel motion anchored by OWASP research contributions, and a channel motion through a dedicated MSSP program and — following the September 2025 acquisition by SentinelOne — SentinelOne's global partner and reseller ecosystem within the Singularity Platform. Pre-acquisition, Prompt Security raised approximately $23M ($5M seed Jan 2024 led by Hetz Ventures; $18M Series A Nov 2024 led by Jump Capital with Hetz, Ridge, Okta Ventures, and F5) and served a customer base spanning Fortune 500 organizations (The New York Times, New Relic, Royal Caribbean) alongside mid-market logos in cybersecurity, FinTech, healthcare, and media. Pricing is not publicly disclosed and contracts are sold under the SentinelOne Master Subscription Agreement post-acquisition.
Prompt Security firmographics
Firmographics- Name
- Prompt Security
- Legal name
- Prompt Security
- Website
- https://prompt.security
- Company type
- Private
- Founded year
- 2023
- Operating status
- Acquired
- Headcount range
- 11–50 employees
- Short description
- Prompt Security provides an enterprise AI security platform protecting organizations against generative AI risks across employee GenAI usage, homegrown LLM apps, AI code assistants, and agentic AI workloads. Founded 2023 in Israel; acquired by SentinelOne in 2025 for ~$250 million.
- Ownership category
- akta.pro rank
Prompt Security industry classification
Industry- Product category
- AI Security Software
- NAICS
- Computer Systems Design Services (541512), Custom Computer Programming Services (541511)
- SIC
- Services-Prepackaged Software (7372), Services-Computer Programming Services (7371)
- akta.pro primary industry
- Prompt Security & Injection Defense (HDAAAKAE)
- akta.pro secondary industries
- Enterprise AI Governance, Risk & Compliance Platforms (Model Risk, Audit, Policies) (HDAEANAE), AI Governance, Risk & Compliance (GRC) Platforms (HDAAAMAA)
Keywords
Where Prompt Security is headquartered
LocationHeadquarters
- HQ city
- New York
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Prompt Security business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- Enterprise Subscription (now under SentinelOne Singularity Platform): Subscription-based enterprise SaaS platform licensed annually with cloud (SaaS) or self-hosted deployment options; now sold as the "Prompt Security" module within SentinelOne's Singularity Platform under the SentinelOne Master Subscription Agreement, with subscription terms, renewal terms, and true-up overages defined in the MSA.
- Channel/Partner Resale (via MSSP and SentinelOne Partner ecosystem): Indirect revenue through MSSPs (MSSP program launched July 2024) and via SentinelOne's authorized Partner/reseller channel, where Partners execute Purchase Orders quoting SentinelOne (Prompt Security) pricing and collect Fees from end customers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | Quote-based enterprise subscription; pricing not publicly listed |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels9 records
Prompt Security product offering
Product offeringCore offering
Prompt Security provides an enterprise-grade generative AI security platform that protects organizations across every layer of AI adoption — including employee use of public GenAI tools, homegrown AI applications, AI code assistants, and agentic AI workflows. The platform combines eBPF-based endpoint visibility, browser-layer inspection, dynamic GenAI discovery, and automated red teaming to prevent sensitive data leakage, prompt injection, and AI-specific threats. Complementing the platform are standalone tools such as the MCP Gateway, OneClaw, ClawSec, Prompt Fuzzer, and an AI Risk Assessment Tool.
Product overview
Prompt Security delivers a unified, LLM-agnostic AI security platform composed of the core Prompt Security Platform and several named modules — Prompt for Employees, Prompt for Homegrown AI Apps, Prompt for AI Code Assistants, Prompt for Agentic AI Security (with MCP Gateway), and AI Red Teaming — alongside supporting tools including OneClaw (agent discovery/observability), ClawSec (agent protection), Prompt Fuzzer (open-source vulnerability assessment), and the AI Risk Assessment Tool. The platform can be delivered as SaaS or self-hosted, seamlessly integrates into existing AI and tech stacks, and is augmented by industry solutions for Healthcare and Finance & Insurance. Following its acquisition by SentinelOne in 2025 (~$250M), Prompt Security is positioned as SentinelOne's AI security offering within the Singularity Platform.
Differentiator
Problem solved
Functional benefit
Brands
- OneClaw: Discovery and observability tool for tracking and analyzing OpenClaw (formerly Clawdbot) AI agent deployments across enterprise environments.
- ClawSec
- Prompt Fuzzer
- AI Risk Assessment Tool
Products and services
- Prompt Security Platform Unified GenAI security platform for enterprises, offering end-to-end protection across public GenAI tool usage, proprietary AI applications, AI coding assistants, and autonomous AI agent workflows. Designed for security and IT leaders at Fortune 500 organizations.
- Prompt for Employees Module that secures employee use of public GenAI tools such as ChatGPT, Claude, and Gemini, preventing sensitive data leakage, detecting prompt injection, and enforcing acceptable-use policies.
- Prompt for Homegrown AI Apps Module that protects organization-built generative AI applications from prompt injection, jailbreaks, sensitive data exposure, RAG poisoning, and other model-level attacks throughout the AI lifecycle.
- Prompt for AI Code Assistants Module that secures developer use of AI coding assistants such as Cursor, GitHub Copilot, and Claude Code, detecting sensitive code leakage, insecure code suggestions, and AI-specific developer risks.
- Prompt for Agentic AI Security Module that secures autonomous AI agents and multi-step workflows, providing stateful multi-turn conversation analysis to detect indirect prompt injection and other agent-targeted attacks.
- AI Red Teaming Automated red teaming service that continuously probes AI models, applications, and agents for vulnerabilities using curated attack libraries, generating reports and remediation guidance for security teams.
- MCP Gateway Gateway that secures Model Context Protocol (MCP) communications, controlling and inspecting data and tool calls exchanged between AI agents and external services.
- OneClaw Open-source scanner that tests foundation models and LLM-powered applications for prompt injection vulnerabilities, supporting leading models in the market.
- ClawSec Open-source MCP server that delivers security tooling directly to developers and AI agents, enabling programmatic access to scanning and detection capabilities.
- Prompt Fuzzer Open-source fuzz-testing tool that stress-tests prompts against large language models to surface injection, leakage, and robustness weaknesses.
- AI Risk Assessment Tool Free self-service web tool that maps an organization's generative AI exposure, shadow AI usage, and associated risks, producing a baseline risk report.
- Prompt Security for Healthcare Industry-tailored solution package for healthcare organizations, addressing PHI protection, regulatory compliance, and AI risk in clinical and operational GenAI deployments.
- Prompt Security for Finance & Insurance Industry-tailored solution package for financial services and insurance firms, addressing PII/PFI protection, model governance, and AI risk across customer-facing and internal GenAI use cases.
Quantifiable outcome
- At least 50 different GenAI tools are detected being used every week in the average organization deploying the platform.
- +1 more outcomes
Companies that use Prompt Security
Customer profileNamed customers17 records
Segments7 records
Ideal customer profiles3 records
Prompt Security technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration7 records
AI capability12 records
Feature12 records
Prompt Security partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered moderate, flagship and core.
- Portkey AImoderatePrompt Security integrated with Portkey's AI Gateway to deliver real-time, infrastructure-level guardrails for AI applications through Portkey, putting Prompt Security's AI guardrails where they matter most at the routing layer.
- SentinelOneflagshipSentinelOne announced a definitive agreement in August 2025 to acquire Prompt Security for approximately $250M (all-cash-and-stock); the deal closed by end of October 2025. Prompt Security now operates as a SentinelOne company, sold as a module of the Singularity Platform, and the Singularity Privacy Notice lists Prompt Security's employee AI usage monitoring and control as a Solution.
- TakaramoderatePrompt Security and Takara announced a strategic partnership in August 2024 to "revolutionize AI safety," extending Prompt Security's GenAI security capabilities through Takara's channels and offerings.
- Microsoft 365 CopilotcorePrompt Security launched a comprehensive security and governance solution that helps organizations monitor and protect data shared with Microsoft 365 Copilot.
- GitHub CopilotcorePrompt Security offers integration with GitHub Copilot providing code sanitization, secret exposure prevention, and data leak prevention for AI coding assistants in IDEs.
- Claude (Anthropic) Desktop ApplicationmoderatePrompt Security extended its employee protection to Anthropic's Claude desktop application, delivering comprehensive protection and governance.
- ChatGPT (OpenAI)moderatePrompt Security is the first platform that can inspect ChatGPT both in the native desktop app and in WhatsApp, extending AI governance beyond the browser to native desktop and messaging clients.
- Microsoft 365 (Copilot for Microsoft 365)corePrompt Security launched the industry's first security and governance solution for Copilot for Microsoft 365, setting a new standard for enterprise GenAI security.
Scale indicators6 records
Recent moves6 records
Expansion highlights6 records
Prompt Security competitors and assessment
Company assessmentDirect peers
- Troj.AI: Troj.AI provides AI/LLM risk detection and red teaming for enterprise generative AI applications, directly comparable to Prompt Security's AI Red Teaming and prompt injection prevention capabilities.
- Lakera: Lakera is a direct competitor in enterprise LLM and GenAI application security, offering prompt injection detection, AI red teaming (Gandalf), and guardrails for LLM-backed applications — closely overlapping with Prompt Security's Homegrown Apps and Red Teaming modules.
- HiddenLayer: HiddenLayer provides AI security posture management, model scanning, and runtime protection for ML and LLM systems, directly overlapping with Prompt Security's AI SPM and homegrown LLM app protection modules.
- Protect AI: Protect AI offers an AI security platform covering ML model scanning, LLM security, and AI red teaming for enterprise ML/AI pipelines, directly competing with Prompt Security's homegrown app and red teaming capabilities.
- Calypso AI: Calypso AI provides an AI security and observability platform for enterprise LLM deployments, including prompt injection detection, model monitoring, and policy enforcement — closely comparable to Prompt Security's Homegrown AI Apps and policy enforcement layer.
- Astrix Security: Astrix Security focuses on securing third-party AI connections and non-human identities (NHIs), with particular focus on Shadow AI discovery and governance of AI tool integrations — directly overlapping with Prompt Security's Shadow AI / employee module.
Broad incumbents
- CrowdStrike: CrowdStrike is a broad endpoint and cloud security incumbent that has added AI security capabilities (e.g., Charlotte AI) and Falcon platform coverage of LLM risks, positioning as a platform incumbent that competes for AI security budget against standalone vendors like Prompt Security.
- Palo Alto Networks: Palo Alto Networks offers Prisma AIRS (AI Runtime Security) as a broad platform play for AI security, competing with Prompt Security across LLM runtime protection, posture management, and AI red teaming as part of its larger Strata and Prisma portfolio.
- Microsoft Defender for AI: Microsoft ships native AI security capabilities inside Defender for Cloud (AI Security Posture Management) and Azure AI Content Safety / Prompt Shields, providing bundled AI threat protection for enterprises already on the Microsoft stack that competes head-on with Prompt Security's offerings.
- Cisco (via Robust Intelligence): Cisco acquired Robust Intelligence to add AI security to its Security Cloud portfolio, offering model firewalling and AI runtime protection as part of an integrated platform that competes with Prompt Security's Homegrown AI Apps and Firewall for AI modules.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Prompt Security social profiles
Digital presencePrompt Security compliance and trust
Trust signalCompliance6 records
Prompt Security financial estimates
Financial estimateRevenue estimate
Valuation estimate
Prompt Security leadership team
Management profileNumber of profiles
Profiles5 records
Prompt Security funding detail
Funding detailFunding overview
Funding rounds2 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Prompt Security M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Prompt Security
What does Prompt Security do?
Prompt Security provides an enterprise-grade generative AI security platform that protects organizations across every layer of AI adoption — including employee use of public GenAI tools, homegrown AI applications, AI code assistants, and agentic AI workflows. The platform combines eBPF-based endpoint visibility, browser-layer inspection, dynamic GenAI discovery, and automated red teaming to prevent sensitive data leakage, prompt injection, and AI-specific threats. Complementing the platform are standalone tools such as the MCP Gateway, OneClaw, ClawSec, Prompt Fuzzer, and an AI Risk Assessment Tool.
Is Prompt Security a public or private company?
Prompt Security is a private company. It is classified as corporate owned and is currently acquired.
When was Prompt Security founded?
Prompt Security was founded in 2023. It employs 11 to 50 people.
Where is Prompt Security based?
Prompt Security is headquartered in New York, United States, in the North America region.
How does Prompt Security make money?
Two revenue lines are on record. Enterprise Subscription (now under SentinelOne Singularity Platform) is the primary driver. The others are channel/Partner Resale (via MSSP and SentinelOne Partner ecosystem).
Who are Prompt Security's main competitors?
Direct peers on record are Troj.AI, Lakera, HiddenLayer, Protect AI, Calypso AI and Astrix Security. Broad incumbents are CrowdStrike, Palo Alto Networks, Microsoft Defender for AI and Cisco (via Robust Intelligence).
Does Prompt Security have an API?
No public API is recorded for Prompt Security.
What industry is Prompt Security in?
Prompt Security's product category is AI Security Software. Its primary akta.pro industry code is HDAAAKAE, Prompt Security & Injection Defense, with a secondary code of HDAEANAE, Enterprise AI Governance, Risk & Compliance Platforms (Model Risk, Audit, Policies). Its NAICS code is 541512 and its SIC code is 7372.