SAN FRANCISCO, CA – August 3, 2026 – The AI arms race is heating up. Nightfall AI, the data security platform built for the age of AI, is leading the sprint to secure the leading AI innovators. Nightfall closed the quarter with five Forbes AI 50 companies – nearly $35 billion in combined valuation. Ten percent of the world's most important AI companies trust Nightfall’s platform to protect the sensitive data racing through their AI agents, endpoints, and SaaS.
The news comes on the heels of Nightfall's announcement that it just closed its biggest quarter ever – with new business up 241% over the same quarter last year.
The companies joining Nightfall's customer base span some of the most closely watched categories in AI, including AI agent platforms building autonomous systems for customer support workflows, legal workflows, AI model training, and more. For these companies, data security isn't a checkbox – it's foundational infrastructure. As AI agents take on more autonomous responsibility across customer service, research, and operations, the attack surface for sensitive data exposure expands well beyond traditional endpoints and SaaS applications into the models and protocols orchestrating agent behavior itself.
"AI agent companies are choosing us because we go where the risk actually lives," said Rohan Sathe, CEO and co-founder at Nightfall AI. "That means comprehensive coverage across endpoint, SaaS, and MCP – with a platform fundamentally architected for how AI agents behave. We model agent behavior directly, which is what makes best-in-class detection possible in an environment where the old rules of static DLP simply don't apply."
Built for How Agents Actually Work
Traditional data loss prevention tools were designed for a world of human users clicking through applications one action at a time. Agentic AI breaks that model: agents call tools, chain actions across systems, and move data through the Model Context Protocol (MCP) and other emerging standards at machine speed. Nightfall's platform was built specifically to meet this shift, offering:
- Comprehensive coverage across Endpoint, SaaS, and MCP – a unified view of sensitive data exposure everywhere it travels, rather than siloed protection for each surface
- Architecture purpose-built for AI agents – designed from first principles for autonomous, machine-driven data flows rather than retrofitted from legacy DLP
- Agent behavior modeling – control AI agent actions and data movement, detection grounded in behavior rather than static rules alone
- Best-in-class detection accuracy – precision that reduces noise and lets security teams act on what matters
Why the Fastest-Moving AI Companies Are Choosing Nightfall
The concentration of Forbes AI 50 companies among Nightfall's customer base reflects a broader reality: as AI adoption accelerates, so does the volume and velocity of sensitive data moving through AI systems. Companies building at the frontier of AI need a security partner that understands the unique risks of that frontier – not one adapting yesterday's tools to today's problem.
"When you're building AI agents that operate with real autonomy, you need to know exactly what data they're touching and how they're behaving with it, in real time," Rohan Sathe added. "That's the standard we hold ourselves to, and it's why the companies defining this category are the ones choosing us."
About Nightfall AI
Nightfall AI is the leading data security platform built for the age of AI. Nightfall gives security teams comprehensive visibility and control over sensitive data across AI agents, SaaS applications, and endpoints – with detection purpose-built to model and secure the behavior of autonomous AI systems. Leading AI companies trust Nightfall to protect their most sensitive data as they build the next generation of intelligent systems.
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