A "non-human identity" is any account that isn't a person: an API key, a service account, a CI/CD pipeline token — and now, increasingly, an AI agent that can log in, click buttons and call APIs on its own. Most companies have far more of these than they have employees, and unlike a person, an API key or an AI agent doesn't ask for permission before doing something it technically has access to. That's the problem this whole category of tools exists to solve: find every one of these identities, know what they can actually do, and stop the dangerous ones before they act. It's a young, fast-moving market — several of the tools below list each other as direct competitors — so here's how they actually differ.
Broad identity governance: know and control every machine account
Entro Security
Entro Security finds and tracks every non-human identity in a company — API keys, service accounts, AI agents, secrets — and flags when one starts behaving suspiciously.
For who: security, DevOps and engineering teams managing machine identities and AI agents at scale.
Price: quote-only, tiered by number of identities, AI agents, integrations and environments.
Strengths: covers 1,200+ types of non-human identities and secrets, has a dedicated real-time behavioral detection engine (NHIDR), spans cloud, code, CI/CD, messaging and vaults, and is a G2 High Performer — an independent signal that's rare in this category.
Limits: pricing is opaque and scales with your identity count; overlaps heavily with Oasis Security and Token Security, so a real comparison needs quotes from all three.
Oasis Security
Oasis Security manages the full lifecycle of machine identities and AI agents — deciding what they're allowed to access based on what they're actually trying to do, and rotating their credentials automatically.
For who: Fortune 500 companies and organizations in regulated sectors (healthcare, logistics, insurance, finance, energy).
Price: quote-only, based on contract length and terms.
Strengths: intent-based access management (more dynamic than a static role), automated secret rotation, and full lifecycle governance of non-human identities under one policy engine.
Limits: fully opaque pricing with a likely long enterprise sales cycle; intent-based policy setup can be heavy to configure; overkill for a small team.
Token Security
Token Security is an identity-management tool for the machine accounts and AI agents running across on-prem, hybrid and cloud systems — it finds them, controls their access, and reacts automatically to problems.
For who: security and IAM teams adopting generative AI on top of significant hybrid or on-prem infrastructure.
Price: quote-only, priced on number of non-human identities — but it offers free open-source entry tools (AI Privilege Guardian and GPTs Compliance Insights) to try the approach before buying.
Strengths: explicit on-prem + hybrid + cloud coverage (not cloud-only), free tools to test before committing, automated incident response, and broad scope across service accounts, tokens, certificates, secrets and AI agents.
Limits: full pricing isn't public, and it overlaps strongly with Oasis and Entro — worth comparing directly rather than picking on description alone.
AI agent discovery: find every agent running in the company
Onyx Security
Onyx Security is a control panel that finds every AI agent running across a company's SaaS apps, cloud, developer laptops and code repos, maps what each one can access, and steps in when something looks off.
For who: security, AI-governance teams and CISOs trying to control AI agent adoption while staying compliant.
Price: quote-only, sales contact required.
Strengths: very wide discovery surface (SaaS, cloud, dev laptops, code repos), maps permissions and behavior per agent, includes a "Guardian Agent" for continuous monitoring with automatic intervention, and positions itself as a single control plane rather than a point tool.
Limits: pricing fully opaque; overlaps with Autonomous Security, Lasso and SolonGate depending on which layer you care about; no public independent benchmark of detection accuracy.
Autonomous Security
Autonomous Security is an endpoint security tool that finds every AI agent or assistant (like ChatGPT or Cursor) employees have installed on their work computers, and can stop them from taking risky actions.
For who: security teams and CISOs dealing with unauthorized "shadow AI" tools spreading across employee laptops.
Price: quote-only, demo required; one case study cites a 4,000-endpoint deployment.
Strengths: discovers AI tools at the endpoint level — a blind spot for server-side controls — with real-time blocking of dangerous agent actions, and covers 50+ popular AI agents (Claude, ChatGPT, Cursor).
Limits: totally opaque pricing; a very young market (under a year) with vendor stability still to prove; dense direct competition from Lasso, Onyx and SolonGate on an adjacent positioning.
Runtime enforcement and red-teaming
SolonGate
SolonGate is a security checkpoint that sits between AI agents and the tools they're allowed to use, blocking dangerous actions before they run — specifically built around the MCP protocol.
For who: security teams at organizations running autonomous AI agents in production, particularly government and defense.
Price: quote-only, enterprise/government sales contact required.
Strengths: sits directly in the execution path as an MCP proxy, so it can block a call before it runs rather than flag it afterward; purpose-built for MCP, the emerging AI agent protocol; targets the most sensitive deployments (government, defense).
Limits: opaque pricing; an extremely young and crowded market (Lasso, Onyx, Autonomous Security all compete here); a proxy set too strict can break legitimate agent workflows; enterprise-only sales, no self-service.
Lasso Security
Lasso Security tests and monitors company AI systems for attacks like prompt injection, flagging and blocking manipulation attempts before they cause damage.
For who: security teams and executives (CISO, CIO, CEO) at companies in regulated sectors deploying generative AI at scale.
Price: quote-only, custom based on deployment and usage.
Strengths: covers both proactive testing (automated red-teaming) and real-time protection; claims prompt-injection detection in under 50ms at 99.83% accuracy; full visibility into MCP security; clear focus on high-stakes regulated sectors.
Limits: accuracy numbers are vendor-reported, with no public independent benchmark; pricing fully opaque; enterprise sales cycle, no self-service for smaller teams.
Quick comparison
| Tool | Main angle | Best for |
|---|---|---|
| Entro Security | Broad NHI discovery + behavioral detection | Teams wanting the widest identity-type coverage |
| Oasis Security | Intent-based lifecycle governance | Large regulated enterprises |
| Token Security | On-prem + hybrid + cloud identity management | Companies with heavy on-prem/hybrid infrastructure |
| Onyx Security | AI agent discovery across SaaS/cloud/dev | Teams wanting one control plane for agent sprawl |
| Autonomous Security | Endpoint-level AI tool discovery | Stopping shadow AI on employee laptops |
| SolonGate | MCP proxy, blocks actions in real time | High-sensitivity government/defense deployments |
| Lasso Security | Prompt-injection testing and defense | Regulated enterprises red-teaming their own AI |
None of these vendors publish pricing, and most are under two years old — this is a category still shaking out, not a settled market with clear leaders. If you're evaluating this space, the practical move is to first decide which layer actually worries you (identity governance, agent discovery, or runtime blocking), since that narrows seven overlapping options down to two or three genuinely comparable ones, then get quotes from those before committing to a pilot.