Categories / AI Agent Security
3 · Charted CourseAI Agent Security
Products that discover, govern, and enforce runtime policy over autonomous AI agents -- guarding their permissions, tool/MCP calls, and non-human identities -- to stop prompt injection, tool poisoning, data exfiltration, and other unsafe or unauthorized agent actions.
Last updated October 27, 2026
Our read
We count at least 14 AI agent security companies that have already been acquired, most of them in 2026, and about 40 still active. Palo Alto Networks alone bought CyberArk, Protect AI and the AI gateway Portkey. That's a lot of buying in a category Gartner only gave its own page in 2026. Most security tools were built for people and service accounts with fixed permissions. AI agents act without a human in the loop, chain several steps together and call tools and MCP servers along the way. Zenity started in 2021 and repositioned around agents in 2023 and 2024. Its $125M Series C in August 2026 was the category's first $100M round.
Open question for foundersAt least 14 companies in this category have already been acquired, most of them in 2026. If bigger platforms are buying their way into your market, are you building to be acquired or to outlast them?
By the numbers
- 2021First company in the category
- 2024First acquisition
- 2026First $100M round
The first $100M round came 5 years after the first company.
How they talk about AI
Of the 4 pitching agents with public pricing, 3 still price per seat.
How we classify
We read each company's homepage headline and subheadline against a fixed word list; the most explicit match wins. Not mentioned: no AI language at all. Implied: automated, intelligent, smart or autopilot, without saying AI. AI: AI, machine learning, LLM or generative. AI agents: agents, agentic, autonomous or digital workers.This reads positioning, not product: a company with a strong AI product counts as "not mentioned" if its homepage doesn't say so. Homepages are re-read every month.
In their own words
- Aembit
“Identity Control Plane Built for Agents”
With Aembit, every agent access request is enforced through a verified identity, short-lived authorization, and a fully attributed compliance log.
- AIR Security
“We Secure AI Agents”
AIR childproofs your agent environment from end to end - governing the fleet, continuously vetting the supply chain behind every agent, and controlling what each one can access and do in real time.
- CrowdStrike
“CrowdStrike Falcon Platform: One unified platform to secure the agentic enterprise”
The Falcon platform combines the world's richest security data, AI intelligence, automation, and elite expertise to stop breaches.
- Microsoft
“Microsoft Entra Agent ID”
Manage, govern, and protect agent identities and their access to resources—just as you do for employees—with identity, lifecycle, and access controls, now available in Microsoft Agent 365.
- Obsidian Security
“Unlock AI's full potential. Securely.”
Agents need access to third-party apps to do real work. Obsidian makes it safe by providing guardrails and real-time controls.
- Runlayer
“The operating layer for AI”
Runlayer takes your whole team from experimentation to all in on AI. Secure by design, governed by default, and built for enterprise scale.
- Runta
“Run AI agents with lower costs and tighter control.”
Secure runtimes that reduce token usage, protect credentials, and govern network access.
- Straiker
“Agentic AI Security for Every Agent”
Straiker gives security teams visibility and control across every AI agent in the enterprise. Discover agents, MCP servers, and Skills, test how they can fail, and stop malicious behavior at runtime with real-time detection, blocking, and an agentic kill switch.
- Zenity
“Secure AI Agents Everywhere”
Zenity secures long-horizon AI agents at the decision, the exact point where context and intent come together to create the highest risk.
Stage history
- Charted Courserecorded October 12, 2026
Companies we track
Leaders
Pioneers
Incumbents
FAQ
What is AI Agent Security?
Products that discover, govern, and enforce runtime policy over autonomous AI agents -- guarding their permissions, tool/MCP calls, and non-human identities -- to stop prompt injection, tool poisoning, data exfiltration, and other unsafe or unauthorized agent actions.
How mature is the AI Agent Security category?
We place it in stage 3, Charted Course. The waters are mapped. Multiple competitors, analyst coverage, and a known budget line. Differentiation matters more than education.
How big is the AI Agent Security market?
Estimates put it at ~$2.85B (2026). Market sizes vary widely by how analysts draw the category's edges.
How do AI Agent Security companies usually price?
Most price per seat: 75% of the 4 tracked companies with a public pricing model.
When did the AI Agent Security category start?
The first company we count in the category dates to 2021. The first $100M round came in 2026. The first acquisition was in 2024.
How do AI Agent Security companies talk about AI?
Of the 9 we track, by the language in their homepage headline and subheadline as of November 1, 2026: AI agents 8, AI 1, Implied 0, Not mentioned 0. Of the 4 pitching AI agents with public pricing, 3 price per seat.
Which AI Agent Security companies does First to Market track?
Runlayer, Runta, CrowdStrike, Microsoft, AIR Security, Aembit, Straiker, Obsidian Security, Zenity.
Building in AI Agent Security?
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