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HiddenLayer
Enterprise AI security platform covering discovery, model supply-chain scanning, attack simulation, and runtime defense for production ML and generative systems. HiddenLayer raised a $100 million Series B in September 2026.
Security and ML platform teams that need model inventory, supply-chain scanning, and runtime defense across predictive and generative AI.
Buyers who only need a lightweight prompt filter on a single chat endpoint, or who require a published self-serve rate card before talking to sales.
Verdict
HiddenLayer is a strong fit for enterprises that treat AI models as assets to inventory, scan, and defend in production. The platform spans discovery, supply-chain checks, attack simulation, and runtime response, which is broader than a simple prompt guardrail. Buyers like the adversarial-research depth and agentless posture; expect a sales-led commercial process and real integration work before the dashboard earns its keep.
Score Breakdown
How HiddenLayer scores in the categories that matter to its buyers.
The Field at a Glance
How HiddenLayer compares with other Security, safety & guardrails vendors we reviewed, by Overall Score and relative typical engagement cost.
HiddenLayer scores 8.1 in Security, safety & guardrails, ahead of Noma Security (8.0), Lasso Security (7.6), Zenity (6.9), and Lakera (6.8). Relative cost lands upper for this subcategory.
Compared with …
- HiddenLayer vs Noma Security 8.1/8.0
- HiddenLayer vs Zenity 8.1/6.9
Use-case matrix
| Use case | Fit | Notes |
|---|---|---|
| Model file & supply-chain scanning | Strong | Scanning many model formats is the core platform strength. |
| Shadow AI discovery | Strong | The product inventories AI assets across the estate. |
| Runtime adversarial detection | Strong | AIDR monitoring works without access to the model. |
| Lightweight chat prompt filter only | Mixed | Peers that focus on request-path checks may be simpler. |
Review Excerpts
Excerpts from company materials and public coverage of HiddenLayer, plus representative buyer views drawn from public information. Paid reviews and pay-for-play sites were excluded.
“Their non-invasive AIDR solution provides robust, real-time protection against adversarial attacks without ever needing to access a customer's sensitive data or proprietary models.”
“Scanning models before deploy caught a poisoned weight that our usual software composition checks missed.”
Representative buyer view
“Pricing is custom and not publicly listed, so we had to talk to the vendor before comparing it with simpler prompt filters.”
Representative buyer view
“Integration work was the real cost, and it added another dashboard to the security stack.”
Representative buyer view
Where customer reviews couldn't be found, our analysts attempted to give a voice to buyer sentiment, drawing on real information from review sites, forums, and product documentation.
Based on: HiddenLayer’s website
Company Facts
- Founded
- 2022 (CB Insights)
- Headquarters
- Leander, Texas, United States (CB Insights)
- Total funding raised
- $156M (CB Insights)
- Key investors
- Ten Eleven Ventures, M12, Booz Allen Ventures, Morgan Stanley, Delta-V Capital (CB Insights)
- Customers
- US Department of Defense (CB Insights)
- Website
- hiddenlayer.com
Key Leadership
Chris Sestito
Co-founder and CEO
Methodology
This page is an independent evaluation of HiddenLayer for buyers comparing options in security, safety & guardrails. AI Industry Reviews accepts no sponsorships, advertising, or pay-for-placement fees. HiddenLayer did not pay for this review.
What we scored
The headline number is an Overall Score on a 0-10 scale. Eight criteria fall under it in two groups.
- Buyer outcomes (for security, safety & guardrails)
- AI discovery & inventory
- Model supply-chain scanning
- Runtime & adversarial defense
- Request-path prompt guardrails
- Company & commercial
- Innovation & product leadership
- Project management & communication
- Pricing
- Contract fairness
Pricing measures whether the price looks fair for the value delivered, including packaging and renewal friction that show up in real buying cycles.
Score Composition
| Input | Weight | What it covers |
|---|---|---|
| Reviews | 40% | A proprietary read of what practitioners say about likes, complaints, and day-to-day use, including public review sites, forums, and private chat rooms. Paid reviews and pay-for-play sites are out of scope. |
| Product | 35% | Hands-on look at screens and workflows. |
| Pricing | 15% | Whether the price looks fair for what you get. |
| Docs & training | 10% | Docs, tutorials, and training material. |
How we balanced the evidence
The Overall Score is the simple average of the eight criteria. Recommendation language follows that score and the use-case matrix above.
Scope
HiddenLayer is graded here as security, safety & guardrails. Criteria scores can move as more review volume and product checks are added.