Today, I couldn’t be prouder to share that Prompt Security has entered into a definitive agreement to be acquired by SentinelOne.
This marks a major milestone in our journey, one that began less than two years ago with a clear but ambitious mission: to help organizations embrace AI securely.
My co-founder, Lior, and I have spent the past 15 years at the intersection of AI and cybersecurity. We’ve seen the field evolve from niche research into the backbone of modern technology. As AI matured, and quickly became the most widely adopted and transformative technology in history, we recognized a massive gap: the world was racing ahead with AI, but security wasn’t keeping up.
It became clear to us that securing AI couldn’t be an afterthought. It required a purpose-built solution, one designed from the ground up to address AI’s unique risks and attack surfaces. That’s exactly what we set out to build with Prompt.
With a world-class team and the backing of incredible investors, we moved fast:
- We pioneered and led a new category in Security.
- We already secure dozens of enterprises, including multiple Fortune 500 companies across financial services, retail, and more.
- We protect millions of AI interactions on a monthly basis, preventing prompt injections, data leakage, misuse, and ungoverned access.
- And we have scaled a multi-million-dollar ARR business, in record time.
None of this would have been possible without the incredible people behind Prompt Security: our team, our customers, our partners, and our community. You believed in this mission before it was obvious, and helped us turn a vision into a product, and a product into real-world impact.
Why SentinelOne?
As AI becomes embedded across every layer of enterprise infrastructure, securing it requires tight integration with the broader cybersecurity ecosystem. That’s why joining forces with SentinelOne - a global leader in security - is such a natural fit.
SentinelOne was born and raised in the AI mindset. They’ve always understood the power of AI, Data, Automation, the importance of speed, and the need to continuously adapt to emerging threats. It was clear from our first conversation: this is home.
SentinelOne is not just a cybersecurity giant: it’s one of the very few companies that truly understands both security and AI. That alignment made this partnership not only possible, but obvious.
Together, we will deliver the most comprehensive, enterprise-ready AI Security platform on the market - combining Prompt Security’s category-defining innovation with SentinelOne’s reach, infrastructure, and scale.
What’s Next
The transaction is subject to customary closing conditions, but the vision is already clear: Prompt Security is not going anywhere, we’re just leveling up.
We’ll continue building and expanding Prompt Security as an independent AI security platform: now with greater resources, stronger distribution, and a faster pace of innovation. Our customers will benefit from deeper integrations, faster releases, and higher delivery quality. And our future customers will see an even stronger value proposition as we bring AI security to more organizations, at a global scale.
To everyone who’s been part of this journey: thank you. We’re incredibly proud of what we’ve accomplished and even more excited by what’s ahead.
Onward,
Itamar
Co-founder & CEO, Prompt Security
For more details, check out the official announcement here: https://www.sentinelone.com/press/sentinelone-to-acquire-prompt-security-to-advance-genai-security
