# Prompt Security

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/prompt-security

- Industry: IT Security/Cybersecurity
- Headquarters: New York, US
- Website: www.prompt.security
- Total disclosed funding: $22M
- Latest round: Series A (Nov 20, 2024)
- Investors on record: 6

## About

Based in New York, US, and founded in 2023 by co-founders Itamar Golan, and Lior Drihem, Prompt Security Inc. offers a comprehensive and agnostic approach to safeguarding organizations from emerging cybersecurity threats associated with large language models (LLMs). In August 2025, SentinelOne, Inc., a portfolio company of Sequoia Capital, UpWest, Qualcomm Ventures, Vista Equity Partners, NextEquity Partners, Samsung Venture Investment, Insight Partners, Sound Ventures, Redpoint Ventures, Tiger Global Management, The Westly Group, Third Point, Granite Hill Capital Partners, and Accel, acquired Prompt Security Inc. from Four Rivers, Hetz Ventures, Def5 Llc, Jump Capital, Okta Ventures, and Ridge Ventures for USD 250 million.

The company's platform addresses a spectrum of risks, including prompt injection, privilege escalation, brand reputation damage, and legal challenges, providing a singular solution to mitigate these concerns. Through their innovative architecture, Prompt Security ensures security, data privacy, and safety across all facets of generative AI, catering to both AppSec and IT domains. Prompt Security's product suite empowers organizations to secure their GenAI applications, protect against shadow AI and data privacy breaches, and uphold brand reputation. With easy deployment options and integration capabilities with various AppSec tools and IT systems, Prompt Security offers instant protection against prompt injections, jailbreaks, DDoS attacks, and other potential risks. The company's client portfolio includes Elastic, Zeta Global, New Relic, and Wix, with endorsements highlighting the platform's effectiveness in maintaining security and compliance while embracing GenAI technology.

## Funding rounds

- Series A, Nov 20, 2024, $17M — Ridge Ventures, F5 Networks, Inc., Jump Capital, Hetz Ventures, Okta Ventures
- Seed, Jan 24, 2024, $5M — Hetz Ventures, Four Rivers

## Investors

- Hetz Ventures (https://capitalatlas.ai/funds/hetz-ventures) — Seed, Series A
- Four Rivers — Seed
- Ridge Ventures (https://capitalatlas.ai/funds/ridge-ventures) — Series A
- F5 Networks, Inc. — Series A
- Jump Capital (https://capitalatlas.ai/funds/jump-capital) — Series A
- Okta Ventures (https://capitalatlas.ai/funds/okta-ventures) — Series A