# HiddenLayer vs NVIDIA NeMo Guardrails

| Attribute | HiddenLayer | NVIDIA NeMo Guardrails |
|---|---|---|
| **Vioscale score** | 59.4 (21% (low)) | 61.3 (34% (low)) |
| activity.commits_last_30d | - | 55 |
| adoption.dependent_repos | - | 0 |
| adoption.github_stars | - | 7,016 |
| deployment.options | `{"cloud":true,"hybrid":true,"on_prem":true}` | `{"cloud":true,"on_prem":true,"self_hosted":true}` |
| description.long | A security platform that discovers AI assets, validates model supply chains against vulnerabilities and backdoors, simulates adversarial attacks on AI systems, and enforces runtime protections against inference attacks, model extraction, and model theft without requiring access to proprietary model data. | A Python library that protects language model-based chat applications from common vulnerabilities through modular guardrails. It supports input and output moderation, prompt injection and jailbreak detection, hallucination identification, RAG chunk validation, and integrates with multiple LLM frameworks and safety services. |
| features.capabilities | `{"iso_27001":true,"soc2_type_ii":true,"architecture_model":"managed_cloud_inline_proxy","rag_retrieval_chunk_poisoning_defense":true,"prompt_injection_and_jailbreak_blocking":true,"zero_data_retention_and_prompt_privacy_guarantees":true}` | `{"iso_27001":false,"soc2_type_ii":false,"pricing_model":"free_open_source","architecture_model":"open_source_python_library","rag_retrieval_chunk_poisoning_defense":true,"prompt_injection_and_jailbreak_blocking":true,"inbound_pii_and_credit_card_masking_redaction":true,"streaming_token_interception_and_chunked_eval":true,"sub_50ms_latency_guarantees_for_proxy_routing":false,"custom_regex_and_deterministic_denylist_rulesets":true,"outbound_toxicity_and_competitor_mention_blocking":true,"zero_data_retention_and_prompt_privacy_guarantees":true,"hallucination_and_topical_off_brand_drift_detection":true}` |
| integrations.count | 11 | 11 |
| integrations.list | `[{"name":"CI/CD"},{"name":"MLOps"},{"name":"Data Pipelines"},{"name":"SIEM/SOAR"},{"name":"Microsoft Azure"},{"name":"AWS"},{"name":"Google Cloud Platform"},{"name":"TensorFlow"},{"name":"PyTorch"},{"name":"Microsoft AI Studio"},{"name":"Truefoundry AI Gateway"}]` | `[{"name":"OpenAI"},{"name":"LangChain"},{"name":"Hugging Face"},{"name":"vLLM"},{"name":"KServe"},{"name":"FMS"},{"name":"PrivateAI"},{"name":"Polygraf"},{"name":"NemoGuard"},{"name":"Nemotron"},{"name":"Patronus"}]` |
| language.primary | - | Python |
| platform.support | - | `{"cli":true,"linux":true}` |
| pricing | - | `{"type":"open_source","summary":"Free, open-source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-21T10:59:13.663Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | - | free |
| pricing.transparent | - | yes |
| release.cadence_days | - | 39 |
| release.history | - | `[{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.23.0","date":"2026-07-01T16:22:19Z","type":"stable","version":"v0.23.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.22.0","date":"2026-05-22T20:25:31Z","type":"stable","version":"v0.22.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.21.0","date":"2026-03-12T13:22:49Z","type":"stable","version":"v0.21.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.20.0","date":"2026-01-22T08:44:24Z","type":"stable","version":"v0.20.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.19.0","date":"2025-12-03T17:27:00Z","type":"stable","version":"v0.19.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.18.0","date":"2025-11-06T20:06:41Z","type":"stable","version":"v0.18.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.17.0","date":"2025-10-09T16:45:35Z","type":"stable","version":"v0.17.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.16.0","date":"2025-09-05T19:55:08Z","type":"stable","version":"v0.16.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.15.0","date":"2025-08-08T11:22:08Z","type":"stable","version":"v0.15.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.14.1","date":"2025-07-08T18:50:24Z","type":"stable","version":"v0.14.1"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.14.0","date":"2025-06-11T18:58:04Z","type":"stable","version":"v0.14.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.13.0","date":"2025-03-25T18:25:34Z","type":"stable","version":"v0.13.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.12.0","date":"2025-02-26T18:10:50Z","type":"stable","version":"v0.12.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.11.1","date":"2025-01-16T22:25:48Z","type":"stable","version":"v0.11.1"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.11.0","date":"2024-11-19T13:54:31Z","type":"stable","version":"v0.11.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.10.1","date":"2024-10-02T18:38:56Z","type":"stable","version":"v0.10.1"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.10.0","date":"2024-09-27T21:47:53Z","type":"stable","version":"v0.10.0"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.9.1.1","date":"2024-07-26T11:09:15Z","type":"stable","version":"v0.9.1.1"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.9.1","date":"2024-07-25T12:02:16Z","type":"stable","version":"v0.9.1"},{"url":"https://github.com/NVIDIA-NeMo/Guardrails/releases/tag/v0.9.0","date":"2024-05-10T07:51:27Z","type":"stable","version":"v0.9.0"}]` |
| security.disclosure_policy | - | yes |
| security.iso27001 | yes | - |
| security.soc2 | yes | - |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2FNVIDIA%2FNeMo-Guardrails&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (AI Guardrails)

| Capability | HiddenLayer | NVIDIA NeMo Guardrails |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Architecture model | Managed cloud inline proxy | Open source python library |
| Prompt injection and jailbreak blocking | ✓ | ✓ |
| Inbound pii and credit card masking redaction | - | ✓ |
| Outbound toxicity and competitor mention blocking | - | ✓ |
| Hallucination and topical off brand drift detection | - | ✓ |
| Sub 50ms latency guarantees for proxy routing | - | ✗ |
| Custom regex and deterministic denylist rulesets | - | ✓ |
| Streaming token interception and chunked eval | - | ✓ |
| Rag retrieval chunk poisoning defense | ✓ | ✓ |
| Zero data retention and prompt privacy guarantees | ✓ | ✓ |
| SOC2 type ii | ✓ | ✗ |
| ISO 27001 | ✓ | ✗ |
| Pricing model | - | Free open source |

*Source: Vioscale. Generated 2026-09-01T14:44:49.406Z. "-" = undocumented, not absent.*