WitnessAI
AI security & governance (AI firewall)
WitnessAI is an inline "AI firewall" — agentless network-level discovery (Observe), an intent-based policy engine (Control), and inline protection with PII tokenization and prompt-injection blocking (Protect), enforcing at the tool-call and MCP-server level.
Noma Security
AI security platform (AI-SPM + AI-DR + red teaming)
Noma is a broad AI security platform — AI security posture management (model, pipeline and notebook scanning), AI detection & response, agentic access control, and automated red-teaming — across 80+ data and AI platforms. The most heavily funded vendor in this set.
How they compare
Twelve criteria that decide whether an enterprise can prove — not just hope — that its AI agents stay inside policy.
| Criterion | WitnessAI | Noma |
|---|---|---|
| Deterministic, rule-based authorization | ◐ | ◐ |
| Pre-execution enforcement | ● | ◐ |
| Segregation of Duties enforcement | ○ | ○ |
| Excessive-agency prevention / least privilege | ◐ | ● |
| Design-time action-surface mapping | ○ | ◐ |
| Compliance-classified tools catalog | ◐ | ◐ |
| Full lifecycle coverage (design-time + runtime) | ◐ | ● |
| Named-approver human-in-the-loop routing | ○ | ◐ |
| SOX / GDPR / financial-GRC control mapping & evidence | ◐ | ○ |
| AI-specific standards (ISO 42001, EU AI Act, NIST AI RMF, OWASP LLM) | ○ | ● |
| Immutable / tamper-evident audit ledger | ◐ | ◐ |
| GRC / internal-audit / IT-governance buyer fit | ○ | ◐ |
Where WitnessAI is strong
- Best-in-class agentless AI observability — network-level shadow-AI discovery, no endpoint agents
- Identity-based policy that attributes every agent action back to a human identity
- Strong inline data protection — PII/PCI/PHI tokenization before data reaches a model
- Real inline pre-execution blocking, with heavyweight backing and fast enterprise traction
Where Noma Security is strong
- Deep AI-SPM and AI supply-chain security — model artifacts, serialization risks, pipelines, notebooks
- ML-based threat detection for prompt injection and data leakage, with sensitive-data masking
- Automated red-teaming and broad discovery across 80+ data/AI platforms
- Maps to OWASP LLM, MITRE ATLAS, NIST AI RMF, EU AI Act and ISO 42001 — the standards leader here
What both leave to you: governance
WitnessAI and Noma Security secure how agents operate — but neither enforces Segregation of Duties, maps an agent's action surface at design time, or produces SOX/GDPR-grade compliance evidence. That is the layer LangGuard adds.
- Deterministic, rule-based authorization on every action — reproducible and auditable, not probabilistic
- Segregation-of-Duties enforcement built in — the only vendor in this set to ship it
- Design-time action-surface mapping plus a compliance-classified tools catalog (SoD, SOX, GDPR, ISO 42001)
- Named-approver human-in-the-loop routing and an immutable, tamper-evident audit ledger
- Built for GRC, internal audit and IT governance — with SOX/GDPR control evidence
The bottom line
WitnessAI and Noma Security are both strong runtime security tools. If your requirement is deterministic authorization, Segregation of Duties, design-time action-surface mapping, and audit-grade compliance evidence, LangGuard governs what agents are allowed to do — before they do it — and works alongside either.
Request Free TrialMore comparisons
Find out what your agents can do —
before your auditor does.
LangGuard maps your complete agent action surface in minutes. Free for the first five managed agents. All Scopes — Finance, IT, Procurement, HR — included from day one. No policy writing required.
No credit card required · First 5 agents free · All LOB Scopes included · Enterprise ready