Best Non-Human Identity (NHI) Security Tools in 2026

The best NHI security tools give every non-human identity — service accounts, secrets, workloads and AI agents — a governed identity with least-privilege access, continuous monitoring and clean lifecycle, instead of long-lived keys no one owns. The category splits into two jobs: securing the existing population of machine identities and secrets, and governing the fast-growing AI-agent subset in the request path. Most tools do the first; only a few do the second.

In one line: NHI security is identity and access management for everything that isn’t a human — and AI agents are the newest, fastest-growing kind of non-human identity.

A note on 2026’s consolidation

The NHI market consolidated hard this year, so vendor lists written even a few months ago are out of date. The three best-known pure-plays were all acquired: Astrix Security by Cisco, Oasis Security by Cyera (now Cyera Identity), and Entro Security by SailPoint. Okta also acquired Permiso. The list below reflects where things actually stand in late 2026, and favours platforms that are still distinct, buyable and relevant to AI-agent identity.

The top NHI security tools at a glance

Securing AI agents specifically? See how TrueFoundry governs agent identity in the request path.

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How we grouped them

NHI security is not one problem. It helps to see which job each tool is built for:

• Discovery & posture: inventory the service accounts, tokens and workloads you already have, and flag over-privilege and risk.
• Secrets security: find, rotate and govern the API keys, certificates and tokens NHIs use.
• Access / enforcement: decide and enforce, at runtime, what a non-human identity may actually do — the newest and hardest part, and where AI agents live.

Most enterprises end up using one tool for the existing machine-identity estate and another for enforcing AI-agent access. The list reflects that split honestly.

The best NHI security tools in 2026

1. TrueFoundry

TrueFoundry secures the AI-agent slice of NHI in the request path. Where most NHI tools discover and score identities after the fact, TrueFoundry gives every agent its own verifiable identity and enforces what it can do on every call — authenticating the agent, authorizing each action under least-privilege policy (RBAC plus optional Cedar), carrying on-behalf-of delegation that can only narrow access, and auditing every decision — from one gateway you can run as SaaS, in your VPC, on-prem or air-gapped.

It is not a general secrets-sprawl scanner; it is the enforcement plane for AI agents as non-human identities, which is exactly the part legacy NHI tooling was never built for.

Top Features:

• Per-agent identity with authentication and least-privilege authorization enforced at the gateway (not just monitored).
• On-behalf-of delegation with no privilege amplification, across agent-to-agent chains.
• MCP registry and policy on which agents reach which tools and servers; outbound credentials stay in the gateway, never the agent.
• Certification, runtime-drift detection, decision-evidence audit and an instant per-agent kill switch — deployable SaaS, VPC, on-prem or air-gapped.

Best for: securing AI agents as first-class non-human identities, with enforcement in the request path. See AI agent identity and the broader MCP security tooling.

Give every AI agent a governed non-human identity and least-privilege access.

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2. CyberArk

CyberArk comes at NHI from privileged access management. Its heritage is securing privileged human and machine accounts, and it has extended into secrets management (Conjur) and broader machine-identity security. For enterprises already standardized on CyberArk for PAM and secrets, extending that to non-human identities is a natural path.

• Privileged access management for human and machine accounts.
• Secrets management and rotation for machine identities.
• Broad enterprise footprint and compliance heritage.

Best for: PAM-rooted enterprises extending privileged and secrets controls to NHIs.

3. SailPoint (with Entro)

SailPoint, a leader in identity governance (IGA), acquired Entro Security in 2026 to extend governance to non-human identities and AI agents through its Agentic Fabric. Entro brought coverage of more than 1,200 secret, token and certificate types plus agent access controls, which SailPoint folds into its governance model.

• Identity governance extended from humans to machine and agent identities.
• Secrets, token and certificate coverage via Entro (1,200+ types).
• Agentic Fabric for governing AI-agent access within IGA.

Best for: organizations that want NHI governance inside an established IGA program.

4. Aembit

Aembit is a workload identity and access management platform built around secretless access. Instead of storing long-lived credentials, it brokers short-lived, policy-based access for workloads — and increasingly agents — to the services they call, so NHIs never hold standing secrets.

• Secretless, policy-based access for workloads and agents.
• Short-lived, brokered credentials rather than stored keys.
• Conditional access policies for non-human access.

Best for: teams that want to eliminate stored secrets for workload and agent access.

5. Token Security

Token Security takes a machine-first approach to identity security — discovering non-human identities, mapping their access and ownership, and surfacing posture risk across the machine-identity estate. As one of the independent newer entrants after the 2026 consolidation, it is worth evaluating for NHI discovery and posture.

• Discovery and inventory of machine and non-human identities.
• Posture, ownership mapping and risk prioritization.
• Machine-first design for modern cloud estates.

Best for: teams needing visibility and posture across a sprawling machine-identity estate.

6. GitGuardian

GitGuardian attacks NHI risk at its most common source: leaked secrets. It detects secrets sprawl across code and systems, helps remediate exposed credentials, and has extended toward broader NHI governance. Independent and well-funded, it is a strong fit where the first problem is “where are our secrets, and which are exposed?”

• Secrets detection across code, CI/CD and systems.
• Remediation workflows for exposed credentials.
• NHI governance built on secrets visibility.

Best for: finding and remediating secrets sprawl as the foundation of NHI security.

Most NHI tools discover and score. If you need AI-agent access enforced at runtime, that is a different tool.

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How to choose an NHI security tool

• Securing AI agents as identities (enforcement in the request path): TrueFoundry.
• PAM and secrets heritage: CyberArk.
• IGA-led governance of NHIs: SailPoint (with Entro).
• Secretless workload/agent access: Aembit.
• Discovery and posture: Token Security.
• Secrets sprawl: GitGuardian.

Most enterprises pair a tool for the existing machine-identity estate with an enforcement plane for AI agents. They solve different halves of the same problem.

Related reading

• AI Agent Identity: Non-Human Identity for Every Agent
• AI Agent Governance: Five Pillars, Built as Systems
• Best MCP Security Tools in 2026
• Best AI Governance Tools in 2026

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