Best AI Security markBest AI Security

Head to head · Checked against vendor sites, September 2026

Neo vs Harmonic Security: AI agent security compared

The verdict

Neo scores higher overall on our weights (7.5 vs 7.1 out of 10). Neo scores higher on visibility, tool-call control and identity and audit; Harmonic Security scores higher on footprint and maturity. They tie on policy and breadth. Neither publishes list prices. Harmonic Security publishes tier names.

Neo

Best for approval holds and an agent-level audit trail

Read the Neo review

Harmonic Security

Best for data protection in everyday AI use

Read the Harmonic Security review

How do Neo and Harmonic Security compare on each criterion?

Endpoint AI control score, editorial assessment 0-10. Edge is the higher score on each row.
CriterionWeightNeoHarmonic SecurityEdge
Visibility22%97Neo
Why these scores

Neo: Live inventory of agents, models, skills, MCP servers and extensions on every endpoint, with risk scores from its Neoverse knowledge base.

Harmonic Security: Finds AI tool use across browsers, desktop apps and CLI tools, including local tools on devices.

Tool-call control20%87Neo
Why these scores

Neo: Intercepts agent actions at the endpoint and allows, blocks or holds them for approval before they run.

Harmonic Security: Governs at the MCP layer and tool surface, with permissions for what agents can read, write to and act on.

Policy15%88Tie
Why these scores

Neo: Policies built with a built-in LLM, such as Block secret reads or Hold exports over 10 MB; actions are allow, block, redirect or hold for verified human approval, with an audit mode before enforcement.

Harmonic Security: Block in real time, warn the employee with context, or log silently; data classification by work intent.

Identity and audit12%86Neo
Why these scores

Neo: Ties every action to the human or agent that caused it, in what Neo calls an immutable audit chain, with alerts to a SIEM.

Harmonic Security: Unified governance for humans and agents in Harmonic Command; per-action attribution not detailed.

Footprint13%68Harmonic Security
Why these scores

Neo: A lightweight endpoint sensor with no kernel module, no reboot and no OS hooks; analysis stays on the device. It is a new sensor rather than a rollout through existing EDR, and OS support is not listed on the pages we read.

Harmonic Security: Rolls out through Intune, JAMF, Kandji or Group Policy with no proxy redesign.

Breadth8%66Tie
Why these scores

Neo: Its platform page names desktop and SaaS AI such as ChatGPT Desktop, Slack AI, Notion AI and Salesforce Agentforce alongside coding agents; cloud workloads and red teaming are not described.

Harmonic Security: Centered on data protection in AI use; browser, desktop, MCP and API surfaces.

Maturity10%57Harmonic Security
Why these scores

Neo: Came out of stealth on 20 July 2026 with $100M from Andreessen Horowitz and Bessemer; no documentation portal or pricing on neo.ai.

Harmonic Security: Publishes named packaging tiers (Explore, Guide, Command) but no prices.

Total100%7.57.1Neo

How we score

How do they deploy, and what do they cost?

Published facts, reviewed September 2026.
AttributeNeoHarmonic Security
OwnerNot acquiredNot acquired
How it reaches devicesOwn endpoint sensorIntune, JAMF, Kandji or Group Policy
Deployment detailA lightweight endpoint sensor with no kernel module, no reboot and no OS hooks; analysis stays on the device. It is a new sensor rather than a rollout through existing EDR, and OS support is not listed on the pages we read.Harmonic states it rolls out through Intune, JAMF, Kandji or Group Policy, with no proxy redesign and no certificate changes.
PricingContact sales. Neo does not publish pricing.Tiers are published (Explore, Guide, Command), prices are not. Contact sales.

Source: neo.ai · Neo platform · Neo launch announcement (20 Jul 2026) · harmonic.security · Harmonic Command · Harmonic pricing · Reviewed Sep 2026

Which should you choose?

Choose Neo if

  • Your priority matches our designation for Neo: best for approval holds and an agent-level audit trail.
  • You need a fleet-wide inventory of AI agents, MCP servers, extensions and credentials on devices: Neo scores 9 to 7.
  • You need an audit record that separates agent actions from human actions: Neo scores 8 to 6.

Choose Harmonic Security if

  • Your priority matches our designation for Harmonic Security: best for data protection in everyday AI use.
  • You want a light rollout with published deployment detail, ideally through existing EDR or MDM: Harmonic Security scores 8 to 6.
  • Vendor maturity, public documentation and backing weigh heavily in procurement: Harmonic Security scores 7 to 5.

Frequently asked questions

Which is better, Neo or Harmonic Security?

Neo scores higher overall on our weights (7.5 vs 7.1 out of 10). Neo scores higher on visibility, tool-call control and identity and audit; Harmonic Security scores higher on footprint and maturity. They tie on policy and breadth. Scores are editorial assessments from public vendor material, reviewed September 2026.

Do Neo and Harmonic Security publish prices?

No. Neither publishes list prices, so ask both for a quote. Harmonic Security publishes its tier names (Explore, Guide, Command).

Do Neo or Harmonic Security replace EDR?

No. The tools in this guide add control over AI agent actions and work alongside EDR. Neo: Own endpoint sensor. Harmonic Security: Intune, JAMF, Kandji or Group Policy.

Related

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