# Arthur Shield vs NVIDIA NeMo Guardrails

| Attribute | Arthur Shield | NVIDIA NeMo Guardrails |
|---|---|---|
| **Vioscale score** | 62 (56% (medium)) | 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,"self_hosted":true}` | `{"cloud":true,"on_prem":true,"self_hosted":true}` |
| description.long | An AI governance system that helps teams find all AI agents in their environment, assess their risk, enforce policies, and monitor performance—supporting various deployment models from cloud to on-premises, with compliance features for regulated industries. | 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":false,"soc2_type_ii":true,"pricing_model":"flat_enterprise_tier","architecture_model":"managed_cloud_inline_proxy","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":false,"hallucination_and_topical_off_brand_drift_detection":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 | 7 | 11 |
| integrations.list | `[{"name":"OpenTelemetry"},{"name":"Snowflake"},{"name":"AWS Bedrock"},{"name":"Google Vertex AI"},{"name":"AWS"},{"name":"MCP"},{"name":"Claude Code"}]` | `[{"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 |
| market.availability | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"web":true}` | `{"cli":true,"linux":true}` |
| pricing | `{"type":"hybrid","plans":[{"free":true,"name":"Free SaaS","summary":"Free","commitment":"monthly","components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"For small teams getting started with AI","contactSales":false,"includedLimits":{"evals":"3000","users":"unlimited","inferences":"unlimited"}},{"free":false,"name":"Premium SaaS","summary":"$60/mo","commitment":"monthly","components":[{"kind":"fixed","amount":60,"period":"month","currency":"USD"}],"description":"For AI native start-ups and growing orgs","contactSales":false,"includedLimits":{"evals":"75000"}},{"free":false,"name":"Enterprise On-Prem","summary":"Custom pricing","description":"For teams with advanced needs or global scale; includes dedicated and managed VPC options with customized workflows","contactSales":true}],"summary":"Free tier with unlimited evals. Premium SaaS from $60/mo. Custom enterprise pricing.","currency":"USD","freeTier":true,"sourceUrl":"https://www.arthur.ai/pricing-2025","retrievedAt":"2026-08-25T21:47:32.136Z","startingPrice":{"amount":60,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"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 | yes |
| pricing.model | freemium | commercial |
| pricing.price_level | high | free |
| pricing.starting_price | `{"amount":60,"currency":"USD"}` | - |
| pricing.transparent | yes | 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.gdpr | 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 | Arthur Shield | 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 | Flat enterprise tier | Free open source |

*Source: Vioscale. Generated 2026-09-01T15:20:37.069Z. "-" = undocumented, not absent.*