Company Overview
Snapshot
Founded in August 2023 by Itamar Golan, Lior Drihem, and Vitaly Neyman, Prompt Security operates with 51–200 employees. The company raised $23 million across 3 funding rounds from 7 investors, with Hetz Ventures as a lead investor. Prompt Security was acquired by SentinelOne in August 2025.
Business overview
Prompt Security provides a comprehensive platform for securing enterprise AI, focusing on preventing Shadow AI and data exposure risks from third-party tools and copilots. Its technology protects homegrown AI applications from threats such as prompt injections, jailbreaks, and toxic outputs, while also managing the sprawl of AI agents. The company's solution inspects every prompt and response to offer full visibility, enforce policy, and ensure governance across all AI interactions within an organization. Prompt Security operates within the Cyber Security sector, serving enterprises and SMBs & SMEs in markets including Europe and North America.
Strategic signal
In August 2025, SentinelOne acquired Prompt Security for an estimated $250 million, signaling a significant strategic move into generative and agentic AI security. This acquisition highlights the increasing importance of AI security as generative AI becomes more prevalent in enterprise technology and cybersecurity, indicating strong market validation for Prompt Security's specialized solutions.
Log in to access full profile ›Company Intelligence Q&A
- When was Prompt Security acquired?
- Prompt Security was acquired by SentinelOne in August 2025.
- Which investors participated in Prompt Security's Series A funding round?
- In November 2024, Prompt Security raised a Series A round with participation from.
- What was a key strategic partnership announced by Prompt Security?
- In July 2024, Prompt Security launched its GenAI security solution for Managed Security Service Providers (MSSPs) and announced new partnerships with MSSPs including Nebul, Cygnostic, HL Group, and CloudEdge across various regions.
- Who are the founders of Prompt Security?
- Prompt Security was founded by Itamar Golan, Lior Drihem, and Vitaly Neyman.
- What was Prompt Security's initial funding round?
- In October 2023, Prompt Security raised a Seed round led by.