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Harmonic Security is an AI DLP point product — it inspects prompts and redacts sensitive data. GreyScape.ai is the full-stack AI governance platform — discovery, spend control, EU AI Act compliance, approved-models policy, and a tamper-evident audit log. For mid-market companies whose AI problem is broader than just prompt redaction, GreyScape is the platform answer; Harmonic is a single layer.
Pick GreyScape.ai if…
You need to know what AI is running, how much it costs, who's using it, and how to comply with the EU AI Act — not just stop a developer pasting source code into ChatGPT. You want one self-serve platform at $3/user/month that delivers discovery + spend + compliance + audit, with a 14-day refund.
Pick Harmonic Security if…
You've already inventoried your AI tools, locked them down to an approved-only list, AI spend is already tracked elsewhere, and the only remaining problem is real-time prompt-level redaction in a regulated industry where pasting PII is an immediate breach event.
Run GreyScape as your AI platform
Some regulated-industry orgs add a dedicated DLP layer on top of a governance platform. GreyScape.ai is the governance platform — discovery, spend, EU AI Act, approved-models, audit. If a DLP point product like Harmonic is later required for a specific compliance regime, it sits on top of the approved-tool list we maintain.
✓ = built in. ~ = partial / via integration. – = not offered (as of June 2026).
| Capability | GreyScape.ai | Harmonic |
|---|---|---|
Shadow AI discovery (any tool, any browser) Detect AI tools employees use without IT knowing | ||
Browser-extension capture Per-user telemetry from any browser tab | ||
Card-feed + receipt parsing for AI vendors Find AI spend on company cards and personal expenses | ||
AI-vendor cost attribution (per-user $) Map every AI dollar to the person who spent it | ||
AI budgets at org / team / project scope Soft alerts at 75%, hard at 100% | ||
Anomaly detection for AI spend Catch a runaway loop before EOM | ||
EU AI Act compliance register Per-system risk classification, obligations, FRIA, audit pack | ||
Article 50 transparency triggers Detect AI systems requiring user-facing disclosure | ||
Approved-models policy Org-wide allowlist of which AI models employees can use | ||
Approval workflow + auto-provisioning Request → review → service-account key issued | ||
Prompt-level DLP (redact PII, source code, financials) Harmonic's core product surface | ||
Tamper-evident audit log Cryptographic chaining (SHA-256, Postgres trigger) | ||
Self-serve signup at published price Launch in 5 min without a sales call | ||
14-day money-back refund No-questions exit, no sales call required | ||
SIEM forwarding (Splunk, Sentinel, Datadog, etc.) Per-stream cursor, failure-isolated webhook |
Sources: vendor product pages, G2 reviews, public pricing pages as of June 2026. Anything wrong? Email [email protected] and we'll update.
Discovery — the layer DLP can't replace
Harmonic enforces policy on the AI tools you've already configured. We find the AI tools nobody told IT about — Cursor, Claude.ai, Perplexity, niche image-gen tools, ChatGPT Plus on personal cards. You cannot apply DLP to a tool you can't see. The first week with GreyScape you typically uncover 3-5 AI vendors that were running off-policy.
AI spend visibility and budgets — the loudest pain in the room
Per-user, per-vendor, per-token attribution. Org/team/project budgets that alert at 75% and block at 100%. Anomaly detection catches runaway loops before EOM. Harmonic is silent on spend. For most mid-market buyers, AI spend running 20-30% MoM is the pain Harmonic doesn't address at all.
EU AI Act compliance shipped, not on a roadmap
Per-system risk classification against Annex III. Obligation catalogue mapped to Articles 4, 9-17, 26, 27, 49, 50, 71, 73. Evidence vault. FRIA template. Article 50 transparency triggers. One-click audit pack. With enforcement in 53 days, this is the operational layer that has to exist — and Harmonic doesn't ship it.
Approved-models policy + approval workflow
Org-wide allowlist of which AI models (GPT-4 family, Claude Sonnet/Opus, Gemini, local Llama) employees can use, enforced through the browser extension. Approval workflow auto-issues service-account keys on approval. Harmonic operates downstream of approval; we own the approval workflow itself.
One platform, three jobs, real price
Discovery + spend + compliance + audit + approved-models policy in one platform at $3/user/month. Harmonic solves one job (DLP) at enterprise-quoted prices that typically anchor in the mid-five to low-six figures. For a 100-seat team, GreyScape is about $3,600/year; running Harmonic plus separate discovery + spend + compliance tools easily breaks $50k.
Self-serve in 5 minutes, with a refund
Sign up, connect billing accounts, and you're live on your real data in 15 minutes. Harmonic requires sales, procurement, SOC2 review, MSA negotiation — typically 4-12 weeks. Mid-market buyers don't have a quarter to wait.
Narrow scenarios where the honest recommendation is them, not us. For the typical mid-market buyer wrestling with shadow AI, EU AI Act, and AI spend in one quarter, GreyScape.ai is the cleaner answer.
Real-time prompt-level DLP
Harmonic catches sensitive data in flight at the prompt boundary — useful in regulated industries where pasting PII into an AI tool is an immediate breach event. We don't ship inline prompt redaction; we work at the discovery + governance + spend layer where most mid-market AI problems actually live.
Custom-trained data classifiers for enterprise DLP categories
Enterprise customers can train Harmonic's classifiers on their own sensitive-data categories. It's a deep DLP capability for organisations with a dedicated security team and a specific DLP compliance regime to satisfy.
Bottom line
Harmonic Security is one good DLP layer. GreyScape.ai is the AI governance platform — discovery, spend, EU AI Act, approved-models, audit — built to solve the AI problems mid-market companies actually face this quarter. If you can only buy one tool to put AI under control, the answer is GreyScape.
GreyScape.ai and Harmonic Security solve different jobs, and for most mid-market buyers GreyScape is the broader, more urgent platform. Harmonic is AI DLP — it redacts sensitive data inside prompts. GreyScape.ai is full-stack AI governance — discovery, spend, EU AI Act compliance, approved-models policy, audit. If you can only buy one tool, GreyScape covers more of the AI surface.
No on both. Harmonic is purpose-built for prompt-level DLP. It doesn't parse AI-vendor billing, attribute cost to users, enforce budgets, or ship an EU AI Act compliance register. Those are GreyScape.ai's core capabilities — and for most mid-market buyers, the more urgent pain.
Not today. Our browser extension surfaces which AI tools are open and reconciles usage telemetry against billing; we don't inspect prompt content. In a regulated industry where prompt-level redaction is a hard requirement, a dedicated DLP layer can run on top of the approved-tool list we maintain. For the typical mid-market buyer, discovery + spend + compliance is the more urgent stack.
Our extension prioritises per-user AI-tool usage telemetry and reconciles it against AI-vendor billing — the data behind spend attribution, approved-models policy, and the EU AI Act register. Harmonic's extension prioritises prompt inspection. Same delivery mechanism, different data models.
GreyScape.ai is $3/user/month on Standard, published, self-serve, with a 14-day refund. Harmonic is enterprise-quoted; G2 reports place annual contracts in the mid-five to low-six figures. For a 100-seat mid-market team, GreyScape is about $3,600/year.
GreyScape.ai. We ship the working operational layer — per-system risk register against Annex III, obligation catalogue mapped to Articles 4, 9-17, 26, 27, 49, 50, 71, 73, evidence vault, FRIA template, Article 50 transparency triggers, one-click audit pack. Harmonic doesn't ship an EU AI Act module at all.
The demo workspace has seeded data — shadow AI findings, AI spend, budget alerts, compliance register — so you can click through GreyScape.ai in 5 minutes and decide.