SentinelOne has just revealed its acquisition of Prompt Security. An Israeli startup focuses on securing generative AI applications. This acquisition is a combination of cash and stock. Also, it is meant to enhance SentinelOne’s AI security technology. And also to reduce emerging enterprise risks associated with prompt-based attacks. In addition to the risk of data leakage, and threat of malicious or unsanctioned use of shadow AI. Prompt Security’s platform provides the ability to gain real-time visibility, enforce policy, and also safeguard against possible malicious interactions. With AI tools or the use of unapproved AI tools.
This acquisition indicates that SentinelOne is very serious about breaking out of traditional endpoint security. Additionally, into AI-driven security domains within the emerging generative AI space. As enterprises move to rapidly adopt generative AI into business-critical workflows.
What Happened? (Technical Summary)
Established in 2023, Prompt Security achieved rapid momentum. Furthermore, by emphasizing the user interaction layer protection of generative AI workflows. Its technology provides agent-based detection of AI tool usage. Also, it provides real-time policy control and protection from prompt injection attacks. These attacks may lead to unintended influence on an AI’s outputs or exfiltration of sensitive data. SentinelOne will include Prompt Security’s capabilities in its Singularity platform. Eventually, This Platform is offering customers unified control over their use of AI across endpoints, APIs, and cloud environments.
This expected acquisition, slated to close in the company’s fiscal third quarter of 2026. It is also reflective of the establishment of a newly emergent enterprise market. They built generative AI security solutions for a purpose.
Why It Matters for Enterprises
Enterprises are quickly adopting generative AI tools into their workflows. From Software Development and Customer Support to Strategic decision-making. These tools will be productive for organizations. And also introduce risk – prompt injection attacks, shadow AI uses, and inadvertent exposure of intellectual property or regulated information.
So, Prompt Security’s technology can alleviate these risks. It can do this by providing visibility into AI tooling and configuring and enforcing real-time security policies. The integration with SentinelOne’s Singularity platform will enable enterprises to identify any unsanctioned AI tooling they are using. Furthermore, stop any potential unintended data loss and enforce compliance requirements on AI-driven processes.
For the CISO or enterprise security stakeholders following along at home. This acquisition provides SentinelOne with coverage beyond endpoint and cloud workloads and covers an even more fluid attack surface. One of the fastest-changing attack surfaces in the enterprise space – generative AI interactions. Enterprises are adopting AI tools at scale Integrated protection on the Infrastructure. Application layers are a necessary part of meeting the demands of doing business and not just a technological benefit.
Key Points for Security Leaders:
- Generative AI adoption creates new attack vectors. So, these are like prompt injection and data exfiltration.
- Visibility into sanctioned vs. unsanctioned AI use (shadow AI). It is critical for risk governance.
- Integrated security platforms reduce complexity. They do this by covering endpoints, cloud, and AI use cases under one roof.
- The acquisition signals a market shift toward specialized AI security as a core enterprise need.
SentinelOne’s Strategic Positioning
This acquisition further solidifies SentinelOne’s status as a comprehensive security platform. Prompt Security’s generative AI protection capabilities expand the Singularity platform. From endpoint detection and response (EDR), cloud workload protection, and identity security to a new area. AI interaction security.
With Prompt Security technology, SentinelOne can now provide real-time visibility, prompt injection prevention, and also policy enforcement. It can provide this across the wide array of AI applications and interfaces. This is a monumental differentiator versus competitors that largely focus on securing infrastructure. And has very limited coverage for generative AI tools and associated risks.
From a strategic takeaway on this deal. It can be assumed SentinelOne has a clear mindshare in being a leader in security. Leader of next-generation enterprise technologies. When enterprises start adopting large language models (LLMs), generative AI assistants, and AI-enhanced business applications. They will need someone to govern their operations. Meanwhile, SentinelOne hopes to provide governance and security over both traditional IT assets and emerging AI ecosystems. This strategic shift is also rooted in enterprise security priorities. These priorities are simplifying security architecture, reducing vendor sprawl, and preparing for new threat landscapes now dictated by AI-powered operations.
What Enterprise Security Leaders Should Do
With SentinelOne acquiring Prompt Security in late 2022. The impetus on enterprises to think about how generative AI is deployed in their environment and how to protect it has grown significantly. Cybersecurity leaders should take steps to reduce generative AI workflow risks.
- Conduct AI Inventories – Know which AI generative tools are sanctioned and sanctioned (shadow AI) in the organization, understand where generative AI tools/models are being used, and what data is being processed.
- Review AI Security Polices – create and/or refine governance frameworks for AI use, which include acceptable use policies, prompt security, and data use parameters.
- Deploy Real Time Controls – leverage platforms that provide visibility and permit policy enforcement at endpoints, APIs, and user interaction levels, with AI tools.
- Train the Users and Developers – Develop training for teams on prompt injection risks, data leakage, and secured operational usage of AI tools.
- Embed AI Risk Considerations into Existing Programs – introduce AI-related threats to your incident response, vulnerability management, and compliance programs.
Following the above steps, enterprises will likely be able to reduce their exposure to new and emerging AI-specific risks and help enable the organization to begin to utilize generative AI as it inherently becomes part of daily operations.
Broader Trend
The acquisition of Prompt Security by SentinelOne represents a snapshot. A snapshot of the broader trend in the Cybersecurity industry. The haste to secure artificial intelligence ecosystems. Enterprises are jumping headfirst into generative AI. And new attack surfaces are in abundance, thereby fuelling the demand for tailored protection technologies.
In just the past year, several Cybersecurity vendors have taken actions. Similar to this acquisition, to expand their AI security capabilities. For example, Palo Alto Networks has turned its attention to the security of AI models, Tenable has put a renewed emphasis on ML-based vulnerability detection, and Cisco has also acquired companies focused on AI-based risk analytics. These actions show a growing agreement that AI-related risks will not be fringe issues, and are instead going to be front and center of enterprise security strategy going forward.
For enterprise security leaders, this consolidation will bring promises of more standard solutions and faster innovation, but it is also a reminder of the due diligence in deciding on vendors. Choosing partners who can defend both traditional IT risks and emerging AI threats will be an important consideration when designing resilient security architectures, which will enable the next wave of innovation for businesses.
AI Security Consolidation
SentinelOne acquiring Prompt Security represents a significant milestone for securing generative AI at scale. As enterprises embrace generative AI in more critical workflows, visibility and control over how organizations deploy these tools will become a necessity. This acquisition not only enhances SentinelOne’s product suite but also reflects a clearer direction in the industry to make AI security part of broader cybersecurity strategies—a priority every enterprise will need to think about now.
