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HiddenLayer vs Noma Security
HiddenLayer and Noma Security are AI security tools, which find and control the AI models, agents and apps running inside a company. Our editors read both companies' own sites, then read what security teams say about the two tools in public reviews, community boards and chat forums. The table below compares price, limits and features.
| What buyers compare | HiddenLayer | Noma Security |
|---|---|---|
| Integrations and featuresSources 3, 4 | AI discovery, AI supply chain security, AI attack simulation and AI runtime security | Agent security and governance at runtime, across SaaS, cloud and developer environments |
| Best forSources 1, 2 | Security and ML platform teams that need to list their models, scan third-party models and protect models in production | Security teams that must inventory and control agents and AI tools across SaaS, cloud, and developer environments |
List prices in US dollars per month before tax, as published on each vendor's site on October 16, 2026, billed monthly unless the cell says otherwise. "Quote" means the vendor sets the price through its sales team. A green check marks a row where the published data shows a clear edge.
Which one fits
HiddenLayer focuses on the models themselves, while Noma focuses on the agents and tools employees use.
Choose HiddenLayer if
- You use third-party models and need them scanned for hidden code and weaknesses before they run.
- You want to attack your own AI apps before someone else does. HiddenLayer sells AI attack simulation.
- You want runtime protection for models in production.
Choose Noma Security if
- You need an inventory of every AI agent and tool in use across SaaS, cloud and developer environments.
- You want to stop agents that drift or get manipulated while they run.
- You want a vendor large companies already use. Noma says more than 10% of the Fortune 100 are customers.
What buyers say
“HiddenLayer is better when the red team is attacking ML models and prompt-injection on inference. Noma is better when the incidents are agentic SaaS tools doing things nobody approved.”
jamiejones1 · HN · · source
“Noma’s write-ups are about tricking app-layer AI agents. HiddenLayer’s lane is the model security platform, pick based on whether your blast radius is the LLM API or the business agent.”
layer8 · HN · · source
“HiddenLayer scans the third-party models we download before they run, and the attack simulation found weak spots in our own apps. Noma gave us the broader inventory of agents and tools across SaaS and cloud, so the choice came down to whether the risk sat in the models or the agents.”
Director of AI security, large insurance company
Representative buyer view
Verdict
HiddenLayer (8.1 out of 10, Recommend) is for security teams that need to protect the AI models themselves, by scanning third-party models before they run, attacking their own AI apps to find weak spots and guarding models in production. Noma Security (8.0 out of 10, Recommend) is for teams that need to find and control every AI agent and tool in use across SaaS, cloud and developer environments.
Methodology
We read the HiddenLayer and Noma Security pricing pages and product sites on October 16, 2026 and recorded every published price, limit and plan feature. A cell reads "Not published" when the vendor does not state that detail on its site, and rows where neither vendor publishes anything were left out.
Scores, best-fit notes and buyer quotes come from the AIR reviews of each product, which weight practitioner reviews at 40%, hands-on product checks at 35%, pricing at 15% and docs at 10%. Paid reviews and pay-for-play sites are excluded. Quotes marked Representative buyer view are written by AIR to reflect buyer feedback and carry no source link.