Both are AI-native.
Choose by stack fit and trial path.
Harmonic and Aona share a category: purpose-built Workforce AI Security with shadow AI discovery, prompt-layer DLP, and policy enforcement. The differences are stack fit, where each one is geographically deep, and how you can evaluate.
AI-native data security platform with shadow AI discovery and prompt-layer DLP, US-headquartered.
Workforce AI Security platform purpose-built for the regulated mid-market, with browser plugin, native endpoint app, and a 90-day self-serve trial.
Pick Harmonic if you are US-based and want the more recognised AI security brand. Pick Aona if you are in the regulated mid-market, want a 90-day self-serve trial, and need hard-block DLP plus layout-preserving file redaction. Both ship browser-level interception and policy enforcement; the differentiation is on trial motion, file redaction depth, and geography.
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When to pick which
Five scenarios. The honest answer for each one.
You are a US-based enterprise with strong preference for US-incumbent AI security vendors.
Harmonic has stronger US brand presence and a longer reference list with US Fortune 500. If brand recognition is a procurement criterion, this is theirs to win.
Your top requirement is MCP / agent-protocol coverage today.
Both ship MCP-aware coverage today. Harmonic's surface is broader on agent protocols. Aona's native endpoint app inspects process plus network plus MCP servers on the device; if a Harmonic deployment has tested MCP coverage in your stack already, it has the depth lead.
You want to evaluate without a paid POC or multi-week sales-led setup.
Aona offers a 90-day self-serve free trial with a proactive 30-min onboarding call. Harmonic typically runs a sales-led evaluation; trial paths are not self-serve.
You need layout-preserving file redaction (DOCX / Excel) on AI uploads.
Aona's redaction engine preserves formatting and uses length-matched, consistent entity replacement so documents stay readable. Most competitors block or label; Aona redacts in place.
You are in the regulated mid-market in EU / UK / AU and want a vendor that ships there from day one.
Aona is Sydney-headquartered with EU and UK go-to-market focus. Data residency starts in AU today with EU and US regions on the way. Harmonic's centre of gravity is the US.
What each tool actually does
Three columns on the Aona side because the browser plugin and the native endpoint app cover different surfaces. Browser-only customers will see fewer green checks than customers with both.
| Capability | Aona browser plugin | Aona native app | Harmonic Security |
|---|---|---|---|
| Discover | |||
| Shadow AI tool discovery on managed devices | Browser surface | Browser plus native AI apps | Browser-based discovery |
| Native desktop AI app interception (ChatGPT, Copilot, Claude desktop) | Plus generic process-signature detection | Browser-first; native scope narrower | |
| AI agent inspection (process, network, MCP) | Process + network + MCP | MCP-aware controls | |
| Govern | |||
| Hard-block DLP on AI prompts | Modal pauses, no override | ||
| Real-time employee coaching | |||
| Custom guardrails (admin-authored or external) | |||
| Out-of-the-box framework templates (EU AI Act, ISO 42001, sector) | Major frameworks covered | ||
| Protect | |||
| File redaction with layout preservation (DOCX / Excel) | Length-matched replacement | Length-matched replacement | Detection plus block, limited layout-preserving |
| Inline prompt redaction before send | |||
| Operations | |||
| Time to first signal | Hours | Hours | Days to weeks |
| Trial motion | 90-day self-serve | 90-day self-serve | Sales-led evaluation |
| macOS at enterprise scale (managed via MDM) | Manual install only today | ||
Based on vendor documentation as of April 2026. Email trust@aona.ai if you find a factual error.
What it takes to ship each one
- Microsoft Intune (Windows MDM, only path shipped)
- Microsoft Entra (admin SSO + user/group sync)
- Browser MDM coverage
- Identity provider for SSO
Where each one falls short
From public docs and customer interviews. If you find a factual error, email trust@aona.ai.
- Smaller US market presence and brand recognition than Harmonic. If the procurement criterion is US-incumbent, this is honest.
- MCP / agent-protocol coverage is newer on Aona's side. Harmonic's surface is broader and more battle-tested at the agent layer.
- SOC 2 Type II only today. No FedRAMP. Some US-federal buyers will need that bar before adopting either vendor.
- No 90-day self-serve free trial. Evaluations are sales-led with longer timelines.
- File redaction is detection-and-block oriented; layout-preserving entity replacement on DOCX / Excel is not the same depth Aona ships.
- Geographic centre of gravity is the US. EU / UK / AU buyers may face longer sales cycles or weaker local support.
Migrating from Harmonic Security
If you are evaluating both side by side, the honest path is a 90-day Aona free trial alongside whatever Harmonic POC you set up. Both ship as endpoint deployments, so they can run on the same machines without conflict during evaluation. Pick by which one fits your stack, your geography, and your trial budget.
- Existing identity provider (Entra / Okta / Google Workspace)
- Existing MDM (Intune)
- Browser allow-list policy at the network layer
- Sales-led, paid POC for AI DLP
- Manual policy authoring without out-of-the-box framework templates
- Block-and-label-only file handling
- Duplicate browser-DLP extensions on the same browser
- Manual incident triage if Aona's policy violation trend reporting covers your board reporting need
Try Aona alongside Harmonic, on your real traffic
90-day self-serve free trial. Deploys alongside any existing AI security platform via Intune and Entra in under an hour. No commitment.